refactor errors / isolate core/http errors

Cargo.lock

@@ -1653,6 +1653,7 @@ dependencies = [
  "jemallocator",
  "levenshtein_automata",
  "log",
+ "meilisearch-error",
  "meilisearch-schema",
  "meilisearch-tokenizer",
  "meilisearch-types",
@@ -1673,6 +1674,13 @@ dependencies = [
  "zerocopy",
 ]
 
+[[package]]
+name = "meilisearch-error"
+version = "0.10.1"
+dependencies = [
+ "actix-http",
+]
+
 [[package]]
 name = "meilisearch-http"
 version = "0.10.1"
@@ -1699,6 +1707,7 @@ dependencies = [
  "log",
  "main_error",
  "meilisearch-core",
+ "meilisearch-error",
  "meilisearch-schema",
  "meilisearch-tokenizer",
  "mime",
@@ -1729,6 +1738,7 @@ version = "0.10.1"
 dependencies = [
  "bincode",
  "indexmap",
+ "meilisearch-error",
  "serde",
  "serde_json",
  "toml",

meilisearch-core/Cargo.toml

@@ -24,6 +24,7 @@ intervaltree = "0.2.5"
 itertools = "0.9.0"
 levenshtein_automata = { version = "0.2.0", features = ["fst_automaton"] }
 log = "0.4.8"
+meilisearch-error = { path = "../meilisearch-error", version = "0.10.1" }
 meilisearch-schema = { path = "../meilisearch-schema", version = "0.10.1" }
 meilisearch-tokenizer = { path = "../meilisearch-tokenizer", version = "0.10.1" }
 meilisearch-types = { path = "../meilisearch-types", version = "0.10.1" }

meilisearch-core/src/database.rs

@@ -4,17 +4,23 @@ use std::path::Path;
 use std::sync::{Arc, RwLock};
 use std::{fs, thread};
 
+use chrono::{DateTime, Utc};
 use crossbeam_channel::{Receiver, Sender};
-use heed::types::{Str, Unit};
+use heed::types::{Str, Unit, SerdeBincode};
 use heed::{CompactionOption, Result as ZResult};
 use log::debug;
 use meilisearch_schema::Schema;
 
-use crate::{store, update, Index, MResult};
+use crate::{store, update, Index, MResult, Error};
 
 pub type BoxUpdateFn = Box<dyn Fn(&str, update::ProcessedUpdateResult) + Send + Sync + 'static>;
 type ArcSwapFn = arc_swap::ArcSwapOption<BoxUpdateFn>;
 
+type SerdeDatetime = SerdeBincode<DateTime<Utc>>;
+
+const UNHEALTHY_KEY: &str = "_is_unhealthy";
+const LAST_UPDATE_KEY: &str = "last-update";
+
 pub struct MainT;
 pub struct UpdateT;
 
@@ -319,20 +325,66 @@ impl Database {
         self.update_fn.swap(None);
     }
 
-    pub fn main_read_txn(&self) -> heed::Result<heed::RoTxn<MainT>> {
-        self.env.typed_read_txn::<MainT>()
+    pub fn main_read_txn(&self) -> MResult<heed::RoTxn<MainT>> {
+        Ok(self.env.typed_read_txn::<MainT>()?)
     }
 
-    pub fn main_write_txn(&self) -> heed::Result<heed::RwTxn<MainT>> {
-        self.env.typed_write_txn::<MainT>()
+    pub(crate) fn main_write_txn(&self) -> MResult<heed::RwTxn<MainT>> {
+        Ok(self.env.typed_write_txn::<MainT>()?)
     }
 
-    pub fn update_read_txn(&self) -> heed::Result<heed::RoTxn<UpdateT>> {
-        self.update_env.typed_read_txn::<UpdateT>()
+    /// Calls f providing it with a writer to the main database. After f is called, makes sure the
+    /// transaction is commited. Returns whatever result f returns.
+    pub fn main_write<F, R, E>(&self, f: F) -> Result<R, E>
+    where
+        F: FnOnce(&mut heed::RwTxn<MainT>) -> Result<R, E>,
+        E: From<Error>,
+    {
+        let mut writer = self.main_write_txn()?;
+        let result = f(&mut writer)?;
+        writer.commit().map_err(Error::Heed)?;
+        Ok(result)
     }
 
-    pub fn update_write_txn(&self) -> heed::Result<heed::RwTxn<UpdateT>> {
-        self.update_env.typed_write_txn::<UpdateT>()
+    /// provides a context with a reader to the main database. experimental.
+    pub fn main_read<F, R, E>(&self, f: F) -> Result<R, E>
+    where
+        F: Fn(&heed::RoTxn<MainT>) -> Result<R, E>,
+        E: From<Error>,
+    {
+        let reader = self.main_read_txn()?;
+        f(&reader)
+    }
+
+    pub fn update_read_txn(&self) -> MResult<heed::RoTxn<UpdateT>> {
+        Ok(self.update_env.typed_read_txn::<UpdateT>()?)
+    }
+
+    /// Calls f providing it with a writer to the main database. After f is called, makes sure the
+    /// transaction is commited. Returns whatever result f returns.
+    pub fn update_write<F, R, E>(&self, f: F) -> Result<R, E>
+    where
+        F: FnOnce(&mut heed::RwTxn<UpdateT>) -> Result<R, E>,
+        E: From<Error>,
+    {
+        let mut writer = self.update_write_txn()?;
+        let result = f(&mut writer)?;
+        writer.commit().map_err(Error::Heed)?;
+        Ok(result)
+    }
+
+    /// provides a context with a reader to the update database. experimental.
+    pub fn update_read<F, R, E>(&self, f: F) -> Result<R, E>
+    where
+        F: Fn(&heed::RoTxn<UpdateT>) -> Result<R, E>,
+        E: From<Error>,
+    {
+        let reader = self.update_read_txn()?;
+        f(&reader)
+    }
+
+    pub fn update_write_txn(&self) -> MResult<heed::RwTxn<UpdateT>> {
+        Ok(self.update_env.typed_write_txn::<UpdateT>()?)
     }
 
     pub fn copy_and_compact_to_path<P: AsRef<Path>>(&self, path: P) -> ZResult<(File, File)> {
@@ -362,9 +414,41 @@ impl Database {
         indexes.keys().cloned().collect()
     }
 
-    pub fn common_store(&self) -> heed::PolyDatabase {
+    pub(crate) fn common_store(&self) -> heed::PolyDatabase {
         self.common_store
     }
+
+    pub fn last_update(&self, reader: &heed::RoTxn<MainT>) -> MResult<Option<DateTime<Utc>>> {
+        match self.common_store()
+            .get::<_, Str, SerdeDatetime>(reader, LAST_UPDATE_KEY)?
+            {
+                Some(datetime) => Ok(Some(datetime)),
+                None => Ok(None),
+            }
+    }
+
+    pub fn set_last_update(&self, writer: &mut heed::RwTxn<MainT>, time: &DateTime<Utc>) -> MResult<()> {
+        self.common_store()
+            .put::<_, Str, SerdeDatetime>(writer, LAST_UPDATE_KEY, time)?;
+        Ok(())
+    }
+
+    pub fn set_healthy(&self, writer: &mut heed::RwTxn<MainT>) -> MResult<()> {
+        let common_store = self.common_store();
+        common_store.delete::<_, Str>(writer, UNHEALTHY_KEY)?;
+        Ok(())
+    }
+
+    pub fn set_unhealthy(&self, writer: &mut heed::RwTxn<MainT>) -> MResult<()> {
+        let common_store = self.common_store();
+        common_store.put::<_, Str, Unit>(writer, UNHEALTHY_KEY, &())?;
+        Ok(())
+    }
+
+    pub fn get_health(&self, reader: &heed::RoTxn<MainT>) -> MResult<Option<()>> {
+        let common_store = self.common_store();
+        Ok(common_store.get::<_, Str, Unit>(&reader, UNHEALTHY_KEY)?)
+    }
 }
 
 #[cfg(test)]
@@ -1094,3 +1178,4 @@ mod tests {
         assert_matches!(iter.next(), None);
     }
 }
+

meilisearch-core/src/error.rs

@@ -9,6 +9,8 @@ pub use fst::Error as FstError;
 pub use heed::Error as HeedError;
 pub use pest::error as pest_error;
 
+use meilisearch_error::{ErrorCode, Code};
+
 pub type MResult<T> = Result<T, Error>;
 
 #[derive(Debug)]
@@ -21,7 +23,7 @@ pub enum Error {
     MissingDocumentId,
     MaxFieldsLimitExceeded,
     Schema(meilisearch_schema::Error),
-    Zlmdb(heed::Error),
+    Heed(heed::Error),
     Fst(fst::Error),
     SerdeJson(SerdeJsonError),
     Bincode(bincode::Error),
@@ -32,6 +34,13 @@ pub enum Error {
     FacetError(FacetError),
 }
 
+impl ErrorCode for Error {
+    fn error_code(&self) -> Code {
+        //TODO populate codes
+        Code::Other
+    }
+}
+
 impl From<io::Error> for Error {
     fn from(error: io::Error) -> Error {
         Error::Io(error)
@@ -74,7 +83,7 @@ impl From<meilisearch_schema::Error> for Error {
 
 impl From<HeedError> for Error {
     fn from(error: HeedError) -> Error {
-        Error::Zlmdb(error)
+        Error::Heed(error)
     }
 }
 
@@ -126,7 +135,7 @@ impl fmt::Display for Error {
             MissingDocumentId => write!(f, "document id is missing"),
             MaxFieldsLimitExceeded => write!(f, "maximum number of fields in a document exceeded"),
             Schema(e) => write!(f, "schema error; {}", e),
-            Zlmdb(e) => write!(f, "heed error; {}", e),
+            Heed(e) => write!(f, "heed error; {}", e),
             Fst(e) => write!(f, "fst error; {}", e),
             SerdeJson(e) => write!(f, "serde json error; {}", e),
             Bincode(e) => write!(f, "bincode error; {}", e),
@@ -174,6 +183,7 @@ pub enum FacetError {
     AttributeNotFound(String),
     AttributeNotSet { expected: Vec<String>, found: String },
     InvalidDocumentAttribute(String),
+    NoFacetAttributes,
 }
 
 impl FacetError {
@@ -198,6 +208,7 @@ impl fmt::Display for FacetError {
             AttributeNotFound(attr) => write!(f, "unknown {:?} attribute", attr),
             AttributeNotSet { found, expected } => write!(f, "`{}` is not set as a faceted attribute. available facet attributes: {}", found, expected.join(", ")),
             InvalidDocumentAttribute(attr) => write!(f, "invalid document attribute {}, accepted types: String and [String]", attr),
+            NoFacetAttributes => write!(f, "No attributes are set for faceting"),
         }
     }
 }

meilisearch-core/src/facets.rs

@@ -13,7 +13,7 @@ use meilisearch_schema::{FieldId, Schema};
 use meilisearch_types::DocumentId;
 
 use crate::database::MainT;
-use crate::error::{FacetError, Error};
+use crate::error::{FacetError, MResult};
 use crate::store::BEU16;
 
 /// Data structure used to represent a boolean expression in the form of nested arrays.
@@ -34,14 +34,13 @@ impl FacetFilter {
         s: &str,
         schema: &Schema,
         attributes_for_faceting: &[FieldId],
-    ) -> Result<Self, FacetError> {
-
+    ) -> MResult<FacetFilter> {
         let parsed = serde_json::from_str::<Value>(s).map_err(|e| FacetError::ParsingError(e.to_string()))?;
         let mut filter = Vec::new();
         match parsed {
             Value::Array(and_exprs) => {
                 if and_exprs.is_empty() {
-                    return Err(FacetError::EmptyArray);
+                    return Err(FacetError::EmptyArray.into());
                 }
                 for expr in and_exprs {
                     match expr {
@@ -51,7 +50,7 @@ impl FacetFilter {
                         }
                         Value::Array(or_exprs) => {
                             if or_exprs.is_empty() {
-                                return Err(FacetError::EmptyArray);
+                                return Err(FacetError::EmptyArray.into());
                             }
                             let mut inner = Vec::new();
                             for expr in or_exprs {
@@ -60,17 +59,17 @@ impl FacetFilter {
                                         let key = FacetKey::from_str( &s, schema, attributes_for_faceting)?;
                                         inner.push(key);
                                     }
-                                    bad_value => return Err(FacetError::unexpected_token(&["String"], bad_value)),
+                                    bad_value => return Err(FacetError::unexpected_token(&["String"], bad_value).into()),
                                 }
                             }
                             filter.push(Either::Left(inner));
                         }
-                        bad_value => return Err(FacetError::unexpected_token(&["Array", "String"], bad_value)),
+                        bad_value => return Err(FacetError::unexpected_token(&["Array", "String"], bad_value).into()),
                     }
                 }
                 return Ok(Self(filter));
             }
-            bad_value => Err(FacetError::unexpected_token(&["Array"], bad_value)),
+            bad_value => Err(FacetError::unexpected_token(&["Array"], bad_value).into()),
         }
     }
 }
@@ -183,7 +182,7 @@ pub fn facet_map_from_docids(
     index: &crate::Index,
     document_ids: &[DocumentId],
     attributes_for_facetting: &[FieldId],
-) -> Result<HashMap<FacetKey, Vec<DocumentId>>, Error> {
+) -> MResult<HashMap<FacetKey, Vec<DocumentId>>> {
     let mut facet_map = HashMap::new();
     for document_id in document_ids {
         for result in index
@@ -210,7 +209,7 @@ pub fn facet_map_from_docs(
     schema: &Schema,
     documents: &HashMap<DocumentId, IndexMap<String, Value>>,
     attributes_for_facetting: &[FieldId],
-) -> Result<HashMap<FacetKey, Vec<DocumentId>>, Error> {
+) -> MResult<HashMap<FacetKey, Vec<DocumentId>>> {
     let mut facet_map = HashMap::new();
     let attributes_for_facetting = attributes_for_facetting
         .iter()

meilisearch-core/src/query_builder.rs

@@ -268,7 +268,7 @@ mod tests {
             let alternatives = self
                 .index
                 .synonyms
-                .synonyms(&writer, word.as_bytes())
+                .synonyms_fst(&writer, word.as_bytes())
                 .unwrap();
 
             let new = sdset_into_fstset(&new);

meilisearch-core/src/query_tree.rs

@@ -147,7 +147,7 @@ fn split_best_frequency<'a>(reader: &heed::RoTxn<MainT>, ctx: &Context, word: &'
 
 fn fetch_synonyms(reader: &heed::RoTxn<MainT>, ctx: &Context, words: &[&str]) -> MResult<Vec<Vec<String>>> {
     let words = normalize_str(&words.join(" "));
-    let set = ctx.synonyms.synonyms(reader, words.as_bytes())?;
+    let set = ctx.synonyms.synonyms_fst(reader, words.as_bytes())?;
 
     let mut strings = Vec::new();
     let mut stream = set.stream();

meilisearch-core/src/store/documents_fields_counts.rs

@@ -4,6 +4,7 @@ use crate::DocumentId;
 use heed::types::OwnedType;
 use heed::Result as ZResult;
 use meilisearch_schema::IndexedPos;
+use crate::MResult;
 
 #[derive(Copy, Clone)]
 pub struct DocumentsFieldsCounts {
@@ -60,7 +61,7 @@ impl DocumentsFieldsCounts {
         Ok(DocumentFieldsCountsIter { iter })
     }
 
-    pub fn documents_ids<'txn>(self, reader: &'txn heed::RoTxn<MainT>) -> ZResult<DocumentsIdsIter<'txn>> {
+    pub fn documents_ids<'txn>(self, reader: &'txn heed::RoTxn<MainT>) -> MResult<DocumentsIdsIter<'txn>> {
         let iter = self.documents_fields_counts.iter(reader)?;
         Ok(DocumentsIdsIter {
             last_seen_id: None,
@@ -102,7 +103,7 @@ pub struct DocumentsIdsIter<'txn> {
 }
 
 impl Iterator for DocumentsIdsIter<'_> {
-    type Item = ZResult<DocumentId>;
+    type Item = MResult<DocumentId>;
 
     fn next(&mut self) -> Option<Self::Item> {
         for result in &mut self.iter {
@@ -114,7 +115,7 @@ impl Iterator for DocumentsIdsIter<'_> {
                         return Some(Ok(document_id));
                     }
                 }
-                Err(e) => return Some(Err(e)),
+                Err(e) => return Some(Err(e.into())),
             }
         }
         None

meilisearch-core/src/store/main.rs

@@ -2,14 +2,13 @@ use std::borrow::Cow;
 use std::collections::HashMap;
 
 use chrono::{DateTime, Utc};
-use heed::Result as ZResult;
 use heed::types::{ByteSlice, OwnedType, SerdeBincode, Str};
 use meilisearch_schema::{FieldId, Schema};
 use meilisearch_types::DocumentId;
 use sdset::Set;
 
 use crate::database::MainT;
-use crate::RankedMap;
+use crate::{RankedMap, MResult};
 use crate::settings::RankingRule;
 use crate::{FstSetCow, FstMapCow};
 use super::{CowSet, DocumentsIds};
@@ -41,39 +40,38 @@ pub struct Main {
 }
 
 impl Main {
-    pub fn clear(self, writer: &mut heed::RwTxn<MainT>) -> ZResult<()> {
-        self.main.clear(writer)
+    pub fn clear(self, writer: &mut heed::RwTxn<MainT>) -> MResult<()> {
+        Ok(self.main.clear(writer)?)
     }
 
-    pub fn put_name(self, writer: &mut heed::RwTxn<MainT>, name: &str) -> ZResult<()> {
-        self.main.put::<_, Str, Str>(writer, NAME_KEY, name)
+    pub fn put_name(self, writer: &mut heed::RwTxn<MainT>, name: &str) -> MResult<()> {
+        Ok(self.main.put::<_, Str, Str>(writer, NAME_KEY, name)?)
     }
 
-    pub fn name(self, reader: &heed::RoTxn<MainT>) -> ZResult<Option<String>> {
+    pub fn name(self, reader: &heed::RoTxn<MainT>) -> MResult<Option<String>> {
         Ok(self
             .main
             .get::<_, Str, Str>(reader, NAME_KEY)?
             .map(|name| name.to_owned()))
     }
 
-    pub fn put_created_at(self, writer: &mut heed::RwTxn<MainT>) -> ZResult<()> {
-        self.main
-            .put::<_, Str, SerdeDatetime>(writer, CREATED_AT_KEY, &Utc::now())
+    pub fn put_created_at(self, writer: &mut heed::RwTxn<MainT>) -> MResult<()> {
+        Ok(self.main.put::<_, Str, SerdeDatetime>(writer, CREATED_AT_KEY, &Utc::now())?)
     }
 
-    pub fn created_at(self, reader: &heed::RoTxn<MainT>) -> ZResult<Option<DateTime<Utc>>> {
-        self.main.get::<_, Str, SerdeDatetime>(reader, CREATED_AT_KEY)
+    pub fn created_at(self, reader: &heed::RoTxn<MainT>) -> MResult<Option<DateTime<Utc>>> {
+        Ok(self.main.get::<_, Str, SerdeDatetime>(reader, CREATED_AT_KEY)?)
     }
 
-    pub fn put_updated_at(self, writer: &mut heed::RwTxn<MainT>) -> ZResult<()> {
-        self.main
-            .put::<_, Str, SerdeDatetime>(writer, UPDATED_AT_KEY, &Utc::now())
+    pub fn put_updated_at(self, writer: &mut heed::RwTxn<MainT>) -> MResult<()> {
+        Ok(self.main.put::<_, Str, SerdeDatetime>(writer, UPDATED_AT_KEY, &Utc::now())?)
     }
 
-    pub fn updated_at(self, reader: &heed::RoTxn<MainT>) -> ZResult<Option<DateTime<Utc>>> {
-        self.main.get::<_, Str, SerdeDatetime>(reader, UPDATED_AT_KEY)
+    pub fn updated_at(self, reader: &heed::RoTxn<MainT>) -> MResult<Option<DateTime<Utc>>> {
+        Ok(self.main.get::<_, Str, SerdeDatetime>(reader, UPDATED_AT_KEY)?)
     }
 
+<<<<<<< HEAD
     pub fn put_internal_docids(self, writer: &mut heed::RwTxn<MainT>, ids: &sdset::Set<DocumentId>) -> ZResult<()> {
         self.main.put::<_, Str, DocumentsIds>(writer, INTERNAL_DOCIDS_KEY, ids)
     }
@@ -120,6 +118,21 @@ impl Main {
         let mut build = fst::MapBuilder::memory();
         while let Some((docid, values)) = op.next() {
             build.insert(docid, values[0].value).unwrap();
+=======
+    pub fn put_words_fst(self, writer: &mut heed::RwTxn<MainT>, fst: &fst::Set) -> MResult<()> {
+        let bytes = fst.as_fst().as_bytes();
+        Ok(self.main.put::<_, Str, ByteSlice>(writer, WORDS_KEY, bytes)?)
+    }
+
+    pub unsafe fn static_words_fst(self, reader: &heed::RoTxn<MainT>) -> MResult<Option<fst::Set>> {
+        match self.main.get::<_, Str, ByteSlice>(reader, WORDS_KEY)? {
+            Some(bytes) => {
+                let bytes: &'static [u8] = std::mem::transmute(bytes);
+                let set = fst::Set::from_static_slice(bytes).unwrap();
+                Ok(Some(set))
+            }
+            None => Ok(None),
+>>>>>>> 5c760d3... refactor errors / isolate core/http errors
         }
         drop(op);
 
@@ -161,58 +174,76 @@ impl Main {
         self.main.put::<_, Str, ByteSlice>(writer, WORDS_KEY, fst.as_fst().as_bytes())
     }
 
-    pub fn words_fst(self, reader: &heed::RoTxn<MainT>) -> ZResult<FstSetCow> {
+    pub fn words_fst(self, reader: &heed::RoTxn<MainT>) -> MResult<Option<fst::Set>> {
         match self.main.get::<_, Str, ByteSlice>(reader, WORDS_KEY)? {
             Some(bytes) => Ok(fst::Set::new(bytes).unwrap().map_data(Cow::Borrowed).unwrap()),
             None => Ok(fst::Set::default().map_data(Cow::Owned).unwrap()),
         }
     }
 
-    pub fn put_schema(self, writer: &mut heed::RwTxn<MainT>, schema: &Schema) -> ZResult<()> {
-        self.main.put::<_, Str, SerdeBincode<Schema>>(writer, SCHEMA_KEY, schema)
+    pub fn put_schema(self, writer: &mut heed::RwTxn<MainT>, schema: &Schema) -> MResult<()> {
+        Ok(self.main.put::<_, Str, SerdeBincode<Schema>>(writer, SCHEMA_KEY, schema)?)
     }
 
-    pub fn schema(self, reader: &heed::RoTxn<MainT>) -> ZResult<Option<Schema>> {
-        self.main.get::<_, Str, SerdeBincode<Schema>>(reader, SCHEMA_KEY)
+    pub fn schema(self, reader: &heed::RoTxn<MainT>) -> MResult<Option<Schema>> {
+        Ok(self.main.get::<_, Str, SerdeBincode<Schema>>(reader, SCHEMA_KEY)?)
     }
 
-    pub fn delete_schema(self, writer: &mut heed::RwTxn<MainT>) -> ZResult<bool> {
-        self.main.delete::<_, Str>(writer, SCHEMA_KEY)
+    pub fn delete_schema(self, writer: &mut heed::RwTxn<MainT>) -> MResult<bool> {
+        Ok(self.main.delete::<_, Str>(writer, SCHEMA_KEY)?)
     }
 
-    pub fn put_ranked_map(self, writer: &mut heed::RwTxn<MainT>, ranked_map: &RankedMap) -> ZResult<()> {
-        self.main.put::<_, Str, SerdeBincode<RankedMap>>(writer, RANKED_MAP_KEY, &ranked_map)
+    pub fn put_ranked_map(self, writer: &mut heed::RwTxn<MainT>, ranked_map: &RankedMap) -> MResult<()> {
+        Ok(self.main.put::<_, Str, SerdeBincode<RankedMap>>(writer, RANKED_MAP_KEY, &ranked_map)?)
     }
 
-    pub fn ranked_map(self, reader: &heed::RoTxn<MainT>) -> ZResult<Option<RankedMap>> {
-        self.main.get::<_, Str, SerdeBincode<RankedMap>>(reader, RANKED_MAP_KEY)
+    pub fn ranked_map(self, reader: &heed::RoTxn<MainT>) -> MResult<Option<RankedMap>> {
+        Ok(self.main.get::<_, Str, SerdeBincode<RankedMap>>(reader, RANKED_MAP_KEY)?)
     }
 
-    pub fn put_synonyms_fst<A: AsRef<[u8]>>(self, writer: &mut heed::RwTxn<MainT>, fst: &fst::Set<A>) -> ZResult<()> {
+    pub fn put_synonyms_fst<A: AsRef<[u8]>>(self, writer: &mut heed::RwTxn<MainT>, fst: &fst::Set<A>) -> MResult<()> {
         let bytes = fst.as_fst().as_bytes();
-        self.main.put::<_, Str, ByteSlice>(writer, SYNONYMS_KEY, bytes)
+        Ok(self.main.put::<_, Str, ByteSlice>(writer, SYNONYMS_KEY, bytes)?)
     }
 
-    pub fn synonyms_fst(self, reader: &heed::RoTxn<MainT>) -> ZResult<FstSetCow> {
+    pub(crate) fn synonyms_fst(self, reader: &heed::RoTxn<MainT>) -> MResult<Option<fst::Set>> {
         match self.main.get::<_, Str, ByteSlice>(reader, SYNONYMS_KEY)? {
             Some(bytes) => Ok(fst::Set::new(bytes).unwrap().map_data(Cow::Borrowed).unwrap()),
             None => Ok(fst::Set::default().map_data(Cow::Owned).unwrap()),
         }
     }
 
-    pub fn put_stop_words_fst<A: AsRef<[u8]>>(self, writer: &mut heed::RwTxn<MainT>, fst: &fst::Set<A>) -> ZResult<()> {
-        let bytes = fst.as_fst().as_bytes();
-        self.main.put::<_, Str, ByteSlice>(writer, STOP_WORDS_KEY, bytes)
+    pub fn synonyms_list(self, reader: &heed::RoTxn<MainT>) -> MResult<Vec<String>> {
+        let synonyms = self
+            .synonyms_fst(&reader)?
+            .unwrap_or_default()
+            .stream()
+            .into_strs()?;
+        Ok(synonyms)
     }
 
-    pub fn stop_words_fst(self, reader: &heed::RoTxn<MainT>) -> ZResult<FstSetCow> {
+    pub fn put_stop_words_fst<A: AsRef<[u8]>>(self, writer: &mut heed::RwTxn<MainT>, fst: &fst::Set<A>) -> MResult<()> {
+        let bytes = fst.as_fst().as_bytes();
+        Ok(self.main.put::<_, Str, ByteSlice>(writer, STOP_WORDS_KEY, bytes)?)
+    }
+
+    pub(crate) fn stop_words_fst(self, reader: &heed::RoTxn<MainT>) -> MResult<FstSetCow> {
         match self.main.get::<_, Str, ByteSlice>(reader, STOP_WORDS_KEY)? {
             Some(bytes) => Ok(fst::Set::new(bytes).unwrap().map_data(Cow::Borrowed).unwrap()),
             None => Ok(fst::Set::default().map_data(Cow::Owned).unwrap()),
         }
     }
 
-    pub fn put_number_of_documents<F>(self, writer: &mut heed::RwTxn<MainT>, f: F) -> ZResult<u64>
+    pub fn stop_words_list(self, reader: &heed::RoTxn<MainT>) -> MResult<Vec<String>> {
+        let stop_word_list = self
+            .stop_words_fst(reader)?
+            .unwrap_or_default()
+            .stream()
+            .into_strs()?;
+        Ok(stop_word_list)
+    }
+
+    pub fn put_number_of_documents<F>(self, writer: &mut heed::RwTxn<MainT>, f: F) -> MResult<u64>
     where
         F: Fn(u64) -> u64,
     {
@@ -222,11 +253,10 @@ impl Main {
         Ok(new)
     }
 
-    pub fn number_of_documents(self, reader: &heed::RoTxn<MainT>) -> ZResult<u64> {
+    pub fn number_of_documents(self, reader: &heed::RoTxn<MainT>) -> MResult<u64> {
         match self
             .main
-            .get::<_, Str, OwnedType<u64>>(reader, NUMBER_OF_DOCUMENTS_KEY)?
-        {
+            .get::<_, Str, OwnedType<u64>>(reader, NUMBER_OF_DOCUMENTS_KEY)? {
             Some(value) => Ok(value),
             None => Ok(0),
         }
@@ -235,13 +265,12 @@ impl Main {
     pub fn put_fields_distribution(
         self,
         writer: &mut heed::RwTxn<MainT>,
-        fields_distribution: &FreqsMap,
-    ) -> ZResult<()> {
-        self.main
-            .put::<_, Str, SerdeFreqsMap>(writer, FIELDS_DISTRIBUTION_KEY, fields_distribution)
+        fields_frequency: &FreqsMap,
+    ) -> MResult<()> {
+        Ok(self.main.put::<_, Str, SerdeFreqsMap>(writer, FIELDS_FREQUENCY_KEY, fields_frequency)?)
     }
 
-    pub fn fields_distribution(&self, reader: &heed::RoTxn<MainT>) -> ZResult<Option<FreqsMap>> {
+    pub fn fields_distribution(&self, reader: &heed::RoTxn<MainT>) -> MResult<Option<FreqsMap>> {
         match self
             .main
             .get::<_, Str, SerdeFreqsMap>(reader, FIELDS_DISTRIBUTION_KEY)?
@@ -251,51 +280,50 @@ impl Main {
         }
     }
 
-    pub fn attributes_for_faceting<'txn>(&self, reader: &'txn heed::RoTxn<MainT>) -> ZResult<Option<Cow<'txn, Set<FieldId>>>> {
-        self.main.get::<_, Str, CowSet<FieldId>>(reader, ATTRIBUTES_FOR_FACETING_KEY)
+    pub fn attributes_for_faceting<'txn>(&self, reader: &'txn heed::RoTxn<MainT>) -> MResult<Option<Cow<'txn, Set<FieldId>>>> {
+        Ok(self.main.get::<_, Str, CowSet<FieldId>>(reader, ATTRIBUTES_FOR_FACETING_KEY)?)
     }
 
-    pub fn put_attributes_for_faceting(self, writer: &mut heed::RwTxn<MainT>, attributes: &Set<FieldId>) -> ZResult<()> {
-        self.main.put::<_, Str, CowSet<FieldId>>(writer, ATTRIBUTES_FOR_FACETING_KEY, attributes)
+    pub fn put_attributes_for_faceting(self, writer: &mut heed::RwTxn<MainT>, attributes: &Set<FieldId>) -> MResult<()> {
+        Ok(self.main.put::<_, Str, CowSet<FieldId>>(writer, ATTRIBUTES_FOR_FACETING_KEY, attributes)?)
     }
 
-    pub fn delete_attributes_for_faceting(self, writer: &mut heed::RwTxn<MainT>) -> ZResult<bool> {
-        self.main.delete::<_, Str>(writer, ATTRIBUTES_FOR_FACETING_KEY)
+    pub fn delete_attributes_for_faceting(self, writer: &mut heed::RwTxn<MainT>) -> MResult<bool> {
+        Ok(self.main.delete::<_, Str>(writer, ATTRIBUTES_FOR_FACETING_KEY)?)
     }
 
-    pub fn ranking_rules(&self, reader: &heed::RoTxn<MainT>) -> ZResult<Option<Vec<RankingRule>>> {
-        self.main.get::<_, Str, SerdeBincode<Vec<RankingRule>>>(reader, RANKING_RULES_KEY)
+    pub fn ranking_rules(&self, reader: &heed::RoTxn<MainT>) -> MResult<Option<Vec<RankingRule>>> {
+        Ok(self.main.get::<_, Str, SerdeBincode<Vec<RankingRule>>>(reader, RANKING_RULES_KEY)?)
     }
 
-    pub fn put_ranking_rules(self, writer: &mut heed::RwTxn<MainT>, value: &[RankingRule]) -> ZResult<()> {
-        self.main.put::<_, Str, SerdeBincode<Vec<RankingRule>>>(writer, RANKING_RULES_KEY, &value.to_vec())
+    pub fn put_ranking_rules(self, writer: &mut heed::RwTxn<MainT>, value: &[RankingRule]) -> MResult<()> {
+        Ok(self.main.put::<_, Str, SerdeBincode<Vec<RankingRule>>>(writer, RANKING_RULES_KEY, &value.to_vec())?)
     }
 
-    pub fn delete_ranking_rules(self, writer: &mut heed::RwTxn<MainT>) -> ZResult<bool> {
-        self.main.delete::<_, Str>(writer, RANKING_RULES_KEY)
+    pub fn delete_ranking_rules(self, writer: &mut heed::RwTxn<MainT>) -> MResult<bool> {
+        Ok(self.main.delete::<_, Str>(writer, RANKING_RULES_KEY)?)
     }
 
-    pub fn distinct_attribute(&self, reader: &heed::RoTxn<MainT>) -> ZResult<Option<String>> {
+    pub fn distinct_attribute(&self, reader: &heed::RoTxn<MainT>) -> MResult<Option<String>> {
         if let Some(value) = self.main.get::<_, Str, Str>(reader, DISTINCT_ATTRIBUTE_KEY)? {
             return Ok(Some(value.to_owned()))
         }
         return Ok(None)
     }
 
-    pub fn put_distinct_attribute(self, writer: &mut heed::RwTxn<MainT>, value: &str) -> ZResult<()> {
-        self.main.put::<_, Str, Str>(writer, DISTINCT_ATTRIBUTE_KEY, value)
+    pub fn put_distinct_attribute(self, writer: &mut heed::RwTxn<MainT>, value: &str) -> MResult<()> {
+        Ok(self.main.put::<_, Str, Str>(writer, DISTINCT_ATTRIBUTE_KEY, value)?)
     }
 
-    pub fn delete_distinct_attribute(self, writer: &mut heed::RwTxn<MainT>) -> ZResult<bool> {
-        self.main.delete::<_, Str>(writer, DISTINCT_ATTRIBUTE_KEY)
+    pub fn delete_distinct_attribute(self, writer: &mut heed::RwTxn<MainT>) -> MResult<bool> {
+        Ok(self.main.delete::<_, Str>(writer, DISTINCT_ATTRIBUTE_KEY)?)
     }
 
-    pub fn put_customs(self, writer: &mut heed::RwTxn<MainT>, customs: &[u8]) -> ZResult<()> {
-        self.main
-            .put::<_, Str, ByteSlice>(writer, CUSTOMS_KEY, customs)
+    pub fn put_customs(self, writer: &mut heed::RwTxn<MainT>, customs: &[u8]) -> MResult<()> {
+        Ok(self.main.put::<_, Str, ByteSlice>(writer, CUSTOMS_KEY, customs)?)
     }
 
-    pub fn customs<'txn>(self, reader: &'txn heed::RoTxn<MainT>) -> ZResult<Option<&'txn [u8]>> {
-        self.main.get::<_, Str, ByteSlice>(reader, CUSTOMS_KEY)
+    pub fn customs<'txn>(self, reader: &'txn heed::RoTxn<MainT>) -> MResult<Option<&'txn [u8]>> {
+        Ok(self.main.get::<_, Str, ByteSlice>(reader, CUSTOMS_KEY)?)
     }
 }

meilisearch-core/src/store/mod.rs

@@ -31,7 +31,6 @@ use std::collections::HashSet;
 use std::convert::TryInto;
 use std::{mem, ptr};
 
-use heed::Result as ZResult;
 use heed::{BytesEncode, BytesDecode};
 use meilisearch_schema::{IndexedPos, FieldId};
 use sdset::{Set, SetBuf};
@@ -279,14 +278,14 @@ impl Index {
         }
     }
 
-    pub fn customs_update(&self, writer: &mut heed::RwTxn<UpdateT>, customs: Vec<u8>) -> ZResult<u64> {
+    pub fn customs_update(&self, writer: &mut heed::RwTxn<UpdateT>, customs: Vec<u8>) -> MResult<u64> {
         let _ = self.updates_notifier.send(UpdateEvent::NewUpdate);
-        update::push_customs_update(writer, self.updates, self.updates_results, customs)
+        Ok(update::push_customs_update(writer, self.updates, self.updates_results, customs)?)
     }
 
-    pub fn settings_update(&self, writer: &mut heed::RwTxn<UpdateT>, update: SettingsUpdate) -> ZResult<u64> {
+    pub fn settings_update(&self, writer: &mut heed::RwTxn<UpdateT>, update: SettingsUpdate) -> MResult<u64> {
         let _ = self.updates_notifier.send(UpdateEvent::NewUpdate);
-        update::push_settings_update(writer, self.updates, self.updates_results, update)
+        Ok(update::push_settings_update(writer, self.updates, self.updates_results, update)?)
     }
 
     pub fn documents_addition<D>(&self) -> update::DocumentsAddition<D> {

meilisearch-core/src/store/synonyms.rs

@@ -4,7 +4,7 @@ use heed::Result as ZResult;
 use heed::types::ByteSlice;
 
 use crate::database::MainT;
-use crate::FstSetCow;
+use crate::{FstSetCow, MResult};
 
 #[derive(Copy, Clone)]
 pub struct Synonyms {
@@ -27,10 +27,19 @@ impl Synonyms {
         self.synonyms.clear(writer)
     }
 
-    pub fn synonyms<'txn>(self, reader: &'txn heed::RoTxn<MainT>, word: &[u8]) -> ZResult<FstSetCow<'txn>> {
+    pub fn synonyms_fst<'txn>(self, reader: &'txn heed::RoTxn<MainT>, word: &[u8]) -> ZResult<FstSetCow<'txn>> {
         match self.synonyms.get(reader, word)? {
             Some(bytes) => Ok(fst::Set::new(bytes).unwrap().map_data(Cow::Borrowed).unwrap()),
             None => Ok(fst::Set::default().map_data(Cow::Owned).unwrap()),
         }
     }
+
+    pub fn synonyms(self, reader: &heed::RoTxn<MainT>, word: &[u8]) -> MResult<Option<Vec<String>>> {
+        let synonyms = self
+            .synonyms_fst(&reader, word)?
+            .map(|list| list.stream().into_strs())
+            .transpose()?;
+        Ok(synonyms)
+    }
 }
+

meilisearch-core/src/update/customs_update.rs

@@ -1,14 +1,13 @@
-use heed::Result as ZResult;
 
 use crate::database::{MainT, UpdateT};
-use crate::store;
+use crate::{store, MResult};
 use crate::update::{next_update_id, Update};
 
 pub fn apply_customs_update(
     writer: &mut heed::RwTxn<MainT>,
     main_store: store::Main,
     customs: &[u8],
-) -> ZResult<()> {
+) -> MResult<()> {
     main_store.put_customs(writer, customs)
 }
 
@@ -17,7 +16,7 @@ pub fn push_customs_update(
     updates_store: store::Updates,
     updates_results_store: store::UpdatesResults,
     customs: Vec<u8>,
-) -> ZResult<u64> {
+) -> MResult<u64> {
     let last_update_id = next_update_id(writer, updates_store, updates_results_store)?;
 
     let update = Update::customs(customs);

meilisearch-http/Cargo.toml

@@ -35,6 +35,7 @@ indexmap = { version = "1.3.2", features = ["serde-1"] }
 log = "0.4.8"
 main_error = "0.1.0"
 meilisearch-core = { path = "../meilisearch-core", version = "0.10.1" }
+meilisearch-error = { path = "../meilisearch-error", version = "0.10.1" }
 meilisearch-schema = { path = "../meilisearch-schema", version = "0.10.1" }
 meilisearch-tokenizer = {path = "../meilisearch-tokenizer", version = "0.10.1"}
 mime = "0.3.16"

meilisearch-http/src/data.rs

@@ -2,20 +2,14 @@ use std::collections::HashMap;
 use std::ops::Deref;
 use std::sync::Arc;
 
-use chrono::{DateTime, Utc};
-use heed::types::{SerdeBincode, Str};
 use log::error;
-use meilisearch_core::{Database, DatabaseOptions, Error as MError, MResult, MainT, UpdateT};
+use meilisearch_core::{Database, DatabaseOptions, MResult, MainT, UpdateT};
 use sha2::Digest;
 use sysinfo::Pid;
 
 use crate::index_update_callback;
 use crate::option::Opt;
 
-const LAST_UPDATE_KEY: &str = "last-update";
-
-type SerdeDatetime = SerdeBincode<DateTime<Utc>>;
-
 #[derive(Clone)]
 pub struct Data {
     inner: Arc<DataInner>,
@@ -70,24 +64,6 @@ impl DataInner {
         }
     }
 
-    pub fn last_update(&self, reader: &heed::RoTxn<MainT>) -> MResult<Option<DateTime<Utc>>> {
-        match self
-            .db
-            .common_store()
-            .get::<_, Str, SerdeDatetime>(reader, LAST_UPDATE_KEY)?
-        {
-            Some(datetime) => Ok(Some(datetime)),
-            None => Ok(None),
-        }
-    }
-
-    pub fn set_last_update(&self, writer: &mut heed::RwTxn<MainT>) -> MResult<()> {
-        self.db
-            .common_store()
-            .put::<_, Str, SerdeDatetime>(writer, LAST_UPDATE_KEY, &Utc::now())
-            .map_err(Into::into)
-    }
-
     pub fn compute_stats(&self, writer: &mut heed::RwTxn<MainT>, index_uid: &str) -> MResult<()> {
         let index = match self.db.open_index(&index_uid) {
             Some(index) => index,
@@ -124,7 +100,6 @@ impl DataInner {
         index
             .main
             .put_fields_distribution(writer, &distribution)
-            .map_err(MError::Zlmdb)
     }
 }
 
@@ -170,3 +145,4 @@ impl Data {
         data
     }
 }
+

meilisearch-http/src/error.rs

@@ -1,4 +1,5 @@
 use std::fmt;
+use std::error;
 
 use actix_http::ResponseBuilder;
 use actix_web as aweb;
@@ -6,6 +7,25 @@ use actix_web::http::StatusCode;
 use serde_json::json;
 use actix_web::error::JsonPayloadError;
 
+use meilisearch_error::{ErrorCode, Code};
+
+#[derive(Debug)]
+pub struct ResponseError {
+    inner: Box<dyn ErrorCode>,
+}
+
+impl fmt::Display for ResponseError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        self.inner.fmt(f)
+    }
+}
+
+impl From<Error> for ResponseError {
+    fn from(error: Error) -> ResponseError {
+        ResponseError { inner: Box::new(error) }
+    }
+}
+
 #[derive(Debug)]
 pub enum Error {
     BadParameter(String, String),
@@ -26,10 +46,18 @@ pub enum Error {
     SearchDocuments(String),
     PayloadTooLarge,
     UnsupportedMediaType,
-    FacetExpression(String),
-    FacetCount(String),
 }
 
+impl error::Error for Error {}
+
+impl ErrorCode for Error {
+    fn error_code(&self) -> Code {
+        //TODO populate with right error codes
+        Code::Other
+    }
+}
+
+#[derive(Debug)]
 pub enum FacetCountError {
     AttributeNotSet(String),
     SyntaxError(String),
@@ -37,6 +65,14 @@ pub enum FacetCountError {
     NoFacetSet,
 }
 
+impl error::Error for FacetCountError {}
+
+impl ErrorCode for FacetCountError {
+    fn error_code(&self) -> Code {
+        unimplemented!()
+    }
+}
+
 impl FacetCountError {
     pub fn unexpected_token(found: impl ToString, expected: &'static [&'static str]) -> FacetCountError {
         let found = found.to_string();
@@ -137,94 +173,42 @@ impl fmt::Display for Error {
             Self::InvalidIndexUid => f.write_str("Index must have a valid uid; Index uid can be of type integer or string only composed of alphanumeric characters, hyphens (-) and underscores (_)."),
             Self::InvalidToken(err) => write!(f, "Invalid API key: {}", err),
             Self::Maintenance => f.write_str("Server is in maintenance, please try again later"),
-            Self::FilterParsing(err) => write!(f, "parsing error: {}", err),
             Self::MissingAuthorizationHeader => f.write_str("You must have an authorization token"),
             Self::MissingHeader(header) => write!(f, "Header {} is missing", header),
             Self::NotFound(err) => write!(f, "{} not found", err),
             Self::OpenIndex(err) => write!(f, "Impossible to open index; {}", err),
             Self::RetrieveDocument(id, err) => write!(f, "impossible to retrieve the document with id: {}; {}", id, err),
             Self::SearchDocuments(err) => write!(f, "impossible to search documents; {}", err),
-            Self::FacetExpression(e) => write!(f, "error parsing facet filter expression: {}", e),
             Self::PayloadTooLarge => f.write_str("Payload to large"),
             Self::UnsupportedMediaType => f.write_str("Unsupported media type"),
-            Self::FacetCount(e) => write!(f, "error with facet count: {}", e),
         }
     }
 }
 
-impl aweb::error::ResponseError for Error {
+impl aweb::error::ResponseError for ResponseError {
     fn error_response(&self) -> aweb::HttpResponse {
+        let error_code = self.inner.error_code().internal();
         ResponseBuilder::new(self.status_code()).json(json!({
             "message": self.to_string(),
+            "errorCode": error_code,
+            "errorLink": format!("docs.meilisearch.come/error/{}", error_code),
         }))
     }
 
     fn status_code(&self) -> StatusCode {
-       match *self {
-            Self::BadParameter(_, _)
-            | Self::BadRequest(_)
-            | Self::CreateIndex(_)
-            | Self::InvalidIndexUid
-            | Self::OpenIndex(_)
-            | Self::RetrieveDocument(_, _)
-            | Self::FacetExpression(_)
-            | Self::SearchDocuments(_)
-            | Self::FacetCount(_)
-            | Self::FilterParsing(_) => StatusCode::BAD_REQUEST,
-            Self::DocumentNotFound(_)
-            | Self::IndexNotFound(_)
-            | Self::NotFound(_) => StatusCode::NOT_FOUND,
-            Self::InvalidToken(_)
-            | Self::MissingHeader(_) => StatusCode::UNAUTHORIZED,
-            Self::MissingAuthorizationHeader => StatusCode::FORBIDDEN,
-            Self::Internal(_) => StatusCode::INTERNAL_SERVER_ERROR,
-            Self::Maintenance => StatusCode::SERVICE_UNAVAILABLE,
-            Self::PayloadTooLarge => StatusCode::PAYLOAD_TOO_LARGE,
-            Self::UnsupportedMediaType => StatusCode::UNSUPPORTED_MEDIA_TYPE,
-        }
+        self.inner.error_code().http()
     }
 }
 
-impl From<meilisearch_core::HeedError> for Error {
-    fn from(err: meilisearch_core::HeedError) -> Error {
-        Error::Internal(err.to_string())
+impl From<meilisearch_core::Error> for ResponseError {
+    fn from(err: meilisearch_core::Error) -> ResponseError {
+        ResponseError { inner: Box::new(err) }
     }
 }
 
-impl From<meilisearch_core::FstError> for Error {
-    fn from(err: meilisearch_core::FstError) -> Error {
-        Error::Internal(err.to_string())
-    }
-}
-
-impl From<meilisearch_core::FacetError> for Error {
-    fn from(error: meilisearch_core::FacetError) -> Error {
-        Error::FacetExpression(error.to_string())
-    }
-}
-
-impl From<meilisearch_core::Error> for Error {
-    fn from(err: meilisearch_core::Error) -> Error {
-        use meilisearch_core::pest_error::LineColLocation::*;
-        match err {
-            meilisearch_core::Error::FilterParseError(e) => {
-                let (line, column) = match e.line_col {
-                    Span((line, _), (column, _)) => (line, column),
-                    Pos((line, column)) => (line, column),
-                };
-                let message = format!("parsing error on line {} at column {}: {}", line, column, e.variant.message());
-
-                Error::FilterParsing(message)
-            },
-            meilisearch_core::Error::FacetError(e) => Error::FacetExpression(e.to_string()),
-            _ => Error::Internal(err.to_string()),
-        }
-    }
-}
-
-impl From<meilisearch_schema::Error> for Error {
-    fn from(err: meilisearch_schema::Error) -> Error {
-        Error::Internal(err.to_string())
+impl From<meilisearch_schema::Error> for ResponseError {
+    fn from(err: meilisearch_schema::Error) -> ResponseError {
+        ResponseError { inner: Box::new(err) }
     }
 }
 
@@ -234,9 +218,9 @@ impl From<actix_http::Error> for Error {
     }
 }
 
-impl From<FacetCountError> for Error {
-    fn from(other: FacetCountError) -> Error {
-        Error::FacetCount(other.to_string())
+impl From<FacetCountError> for ResponseError {
+    fn from(err: FacetCountError) -> ResponseError {
+        ResponseError { inner: Box::new(err) }
     }
 }
 
@@ -251,6 +235,7 @@ impl From<JsonPayloadError> for Error {
     }
 }
 
-pub fn json_error_handler(err: JsonPayloadError) -> Error {
-    err.into()
+pub fn json_error_handler(err: JsonPayloadError) -> ResponseError {
+    let error = Error::from(err);
+    error.into()
 }

meilisearch-http/src/helpers/authentication.rs

@@ -7,7 +7,7 @@ use actix_service::{Service, Transform};
 use actix_web::{dev::ServiceRequest, dev::ServiceResponse};
 use futures::future::{err, ok, Future, Ready};
 
-use crate::error::Error;
+use crate::error::{Error, ResponseError};
 use crate::Data;
 
 #[derive(Clone)]
@@ -71,10 +71,10 @@ where
         let auth_header = match req.headers().get("X-Meili-API-Key") {
             Some(auth) => match auth.to_str() {
                 Ok(auth) => auth,
-                Err(_) => return Box::pin(err(Error::MissingAuthorizationHeader.into())),
+                Err(_) => return Box::pin(err(ResponseError::from(Error::MissingAuthorizationHeader).into())),
             },
             None => {
-                return Box::pin(err(Error::MissingAuthorizationHeader.into()));
+                return Box::pin(err(ResponseError::from(Error::MissingAuthorizationHeader).into()));
             }
         };
 
@@ -95,7 +95,7 @@ where
             Box::pin(svc.call(req))
         } else {
             Box::pin(err(
-                Error::InvalidToken(auth_header.to_string()).into()
+                ResponseError::from(Error::InvalidToken(auth_header.to_string())).into()
             ))
         }
     }

meilisearch-http/src/helpers/meilisearch.rs

@@ -17,7 +17,7 @@ use serde_json::Value;
 use siphasher::sip::SipHasher;
 use slice_group_by::GroupBy;
 
-use crate::error::Error;
+use crate::error::{Error, ResponseError};
 
 pub trait IndexSearchExt {
     fn new_search(&self, query: String) -> SearchBuilder;
@@ -107,7 +107,7 @@ impl<'a> SearchBuilder<'a> {
         self
     }
 
-    pub fn search(self, reader: &heed::RoTxn<MainT>) -> Result<SearchResult, Error> {
+    pub fn search(self, reader: &heed::RoTxn<MainT>) -> Result<SearchResult, ResponseError> {
         let schema = self
             .index
             .main
@@ -260,7 +260,7 @@ impl<'a> SearchBuilder<'a> {
         reader: &heed::RoTxn<MainT>,
         ranked_map: &'a RankedMap,
         schema: &Schema,
-    ) -> Result<Option<Criteria<'a>>, Error> {
+    ) -> Result<Option<Criteria<'a>>, ResponseError> {
         let ranking_rules = self.index.main.ranking_rules(reader)?;
 
         if let Some(ranking_rules) = ranking_rules {

meilisearch-http/src/lib.rs

@@ -7,14 +7,17 @@ pub mod models;
 pub mod option;
 pub mod routes;
 
-pub use self::data::Data;
-use self::error::json_error_handler;
 use actix_http::Error;
 use actix_service::ServiceFactory;
 use actix_web::{dev, web, App};
+use chrono::Utc;
 use log::error;
+
 use meilisearch_core::ProcessedUpdateResult;
 
+pub use self::data::Data;
+use self::error::{json_error_handler, ResponseError};
+
 pub fn create_app(
     data: &Data,
 ) -> App<
@@ -55,28 +58,23 @@ pub fn index_update_callback(index_uid: &str, data: &Data, status: ProcessedUpda
 
     if let Some(index) = data.db.open_index(&index_uid) {
         let db = &data.db;
-        let mut writer = match db.main_write_txn() {
-            Ok(writer) => writer,
-            Err(e) => {
-                error!("Impossible to get write_txn; {}", e);
-                return;
-            }
-        };
-
+        let res = db.main_write::<_, _, ResponseError>(|mut writer| {
             if let Err(e) = data.compute_stats(&mut writer, &index_uid) {
                 error!("Impossible to compute stats; {}", e)
             }
 
-        if let Err(e) = data.set_last_update(&mut writer) {
+            if let Err(e) = data.db.set_last_update(&mut writer, &Utc::now()) {
                 error!("Impossible to update last_update; {}", e)
             }
 
             if let Err(e) = index.main.put_updated_at(&mut writer) {
                 error!("Impossible to update updated_at; {}", e)
             }
-
-        if let Err(e) = writer.commit() {
-            error!("Impossible to get write_txn; {}", e);
+            Ok(())
+        });
+        match res {
+            Ok(_) => (),
+            Err(e) => error!("{}", e),
         }
     }
 }

meilisearch-http/src/routes/document.rs

@@ -7,7 +7,7 @@ use meilisearch_core::update;
 use serde::Deserialize;
 use serde_json::Value;
 
-use crate::error::Error;
+use crate::error::{Error, ResponseError};
 use crate::helpers::Authentication;
 use crate::routes::{IndexParam, IndexUpdateResponse};
 use crate::Data;
@@ -37,7 +37,7 @@ pub fn services(cfg: &mut web::ServiceConfig) {
 async fn get_document(
     data: web::Data<Data>,
     path: web::Path<DocumentParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -46,13 +46,9 @@ async fn get_document(
     let reader = data.db.main_read_txn()?;
     let internal_id = index.main
         .external_to_internal_docid(&reader, &path.document_id)?
-        .ok_or(ResponseError::document_not_found(&path.document_id))?;
-
-    let response: Document = index
-        .document(&reader, None, document_id)?
         .ok_or(Error::document_not_found(&path.document_id))?;
 
-    Ok(HttpResponse::Ok().json(response))
+    Ok(HttpResponse::Ok().json(document))
 }
 
 #[delete(
@@ -62,7 +58,7 @@ async fn get_document(
 async fn delete_document(
     data: web::Data<Data>,
     path: web::Path<DocumentParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -70,14 +66,10 @@ async fn delete_document(
 
     let document_id = meilisearch_core::serde::compute_document_id(&path.document_id);
 
-    let mut update_writer = data.db.update_write_txn()?;
-
     let mut documents_deletion = index.documents_deletion();
     documents_deletion.delete_document_by_external_docid(path.document_id.clone());
 
-    let update_id = documents_deletion.finalize(&mut update_writer)?;
-
-    update_writer.commit()?;
+    let update_id = data.db.update_write::<_, _, ResponseError>(|writer| Ok(documents_deletion.finalize(writer)?))?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
 }
@@ -95,7 +87,7 @@ async fn get_all_documents(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
     params: web::Query<BrowseQuery>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -105,7 +97,6 @@ async fn get_all_documents(
     let limit = params.limit.unwrap_or(20);
 
     let reader = data.db.main_read_txn()?;
-
     let documents_ids: Result<BTreeSet<_>, _> = index
         .documents_fields_counts
         .documents_ids(&reader)?
@@ -113,23 +104,21 @@ async fn get_all_documents(
         .take(limit)
         .collect();
 
-    let documents_ids = documents_ids?;
-
     let attributes: Option<HashSet<&str>> = params
         .attributes_to_retrieve
         .as_ref()
         .map(|a| a.split(',').collect());
 
-    let mut response = Vec::new();
-    for document_id in documents_ids {
+    let mut documents = Vec::new();
+    for document_id in documents_ids? {
         if let Ok(Some(document)) =
             index.document::<Document>(&reader, attributes.as_ref(), document_id)
         {
-            response.push(document);
+            documents.push(document);
         }
     }
 
-    Ok(HttpResponse::Ok().json(response))
+    Ok(HttpResponse::Ok().json(documents))
 }
 
 fn find_primary_key(document: &IndexMap<String, Value>) -> Option<String> {
@@ -153,7 +142,7 @@ async fn update_multiple_documents(
     params: web::Query<UpdateDocumentsQuery>,
     body: web::Json<Vec<Document>>,
     is_partial: bool,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -175,13 +164,14 @@ async fn update_multiple_documents(
                 .ok_or(Error::bad_request("Could not infer a primary key"))?,
         };
 
-        let mut writer = data.db.main_write_txn()?;
-
         schema
             .set_primary_key(&id)
             .map_err(Error::bad_request)?;
+
+        data.db.main_write::<_, _, ResponseError>(|mut writer| {
             index.main.put_schema(&mut writer, &schema)?;
-        writer.commit()?;
+            Ok(())
+        })?;
     }
 
     let mut document_addition = if is_partial {
@@ -194,9 +184,12 @@ async fn update_multiple_documents(
         document_addition.update_document(document);
     }
 
-    let mut update_writer = data.db.update_write_txn()?;
-    let update_id = document_addition.finalize(&mut update_writer)?;
-    update_writer.commit()?;
+    let update_id = data
+        .db
+        .update_write::<_, _, ResponseError>(move |writer| {
+            let update_id = document_addition.finalize(writer)?;
+            Ok(update_id)
+        })?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
 }
@@ -207,7 +200,7 @@ async fn add_documents(
     path: web::Path<IndexParam>,
     params: web::Query<UpdateDocumentsQuery>,
     body: web::Json<Vec<Document>>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     update_multiple_documents(data, path, params, body, false).await
 }
 
@@ -217,7 +210,7 @@ async fn update_documents(
     path: web::Path<IndexParam>,
     params: web::Query<UpdateDocumentsQuery>,
     body: web::Json<Vec<Document>>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     update_multiple_documents(data, path, params, body, true).await
 }
 
@@ -229,13 +222,12 @@ async fn delete_documents(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
     body: web::Json<Vec<Value>>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
         .ok_or(Error::index_not_found(&path.index_uid))?;
 
-    let mut writer = data.db.update_write_txn()?;
 
     let mut documents_deletion = index.documents_deletion();
 
@@ -244,9 +236,7 @@ async fn delete_documents(
         documents_deletion.delete_document_by_external_docid(document_id);
     }
 
-    let update_id = documents_deletion.finalize(&mut writer)?;
-
-    writer.commit()?;
+    let update_id = data.db.update_write::<_, _, ResponseError>(|writer| Ok(documents_deletion.finalize(writer)?))?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
 }
@@ -255,17 +245,13 @@ async fn delete_documents(
 async fn clear_all_documents(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
         .ok_or(Error::index_not_found(&path.index_uid))?;
 
-    let mut writer = data.db.update_write_txn()?;
-
-    let update_id = index.clear_all(&mut writer)?;
-
-    writer.commit()?;
+    let update_id = data.db.update_write::<_, _, ResponseError>(|writer| Ok(index.clear_all(writer)?))?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
 }

meilisearch-http/src/routes/health.rs

@@ -1,46 +1,37 @@
 use actix_web::{web, HttpResponse};
 use actix_web_macros::{get, put};
-use heed::types::{Str, Unit};
 use serde::Deserialize;
 
-use crate::error::Error;
+use crate::error::{Error, ResponseError};
 use crate::helpers::Authentication;
 use crate::Data;
 
-const UNHEALTHY_KEY: &str = "_is_unhealthy";
-
 pub fn services(cfg: &mut web::ServiceConfig) {
     cfg.service(get_health).service(change_healthyness);
 }
 
 #[get("/health", wrap = "Authentication::Private")]
-async fn get_health(data: web::Data<Data>) -> Result<HttpResponse, Error> {
+async fn get_health(data: web::Data<Data>) -> Result<HttpResponse, ResponseError> {
     let reader = data.db.main_read_txn()?;
-
-    let common_store = data.db.common_store();
-
-    if let Ok(Some(_)) = common_store.get::<_, Str, Unit>(&reader, UNHEALTHY_KEY) {
-        return Err(Error::Maintenance);
+    if let Ok(Some(_)) = data.db.get_health(&reader) {
+        return Err(Error::Maintenance.into());
     }
-
     Ok(HttpResponse::Ok().finish())
 }
 
-async fn set_healthy(data: web::Data<Data>) -> Result<HttpResponse, Error> {
-    let mut writer = data.db.main_write_txn()?;
-    let common_store = data.db.common_store();
-    common_store.delete::<_, Str>(&mut writer, UNHEALTHY_KEY)?;
-    writer.commit()?;
-
+async fn set_healthy(data: web::Data<Data>) -> Result<HttpResponse, ResponseError> {
+    data.db.main_write::<_, _, ResponseError>(|writer| {
+        data.db.set_healthy(writer)?;
+        Ok(())
+    })?;
     Ok(HttpResponse::Ok().finish())
 }
 
-async fn set_unhealthy(data: web::Data<Data>) -> Result<HttpResponse, Error> {
-    let mut writer = data.db.main_write_txn()?;
-    let common_store = data.db.common_store();
-    common_store.put::<_, Str, Unit>(&mut writer, UNHEALTHY_KEY, &())?;
-    writer.commit()?;
-
+async fn set_unhealthy(data: web::Data<Data>) -> Result<HttpResponse, ResponseError> {
+    data.db.main_write::<_, _, ResponseError>(|writer| {
+        data.db.set_unhealthy(writer)?;
+        Ok(())
+    })?;
     Ok(HttpResponse::Ok().finish())
 }
 
@@ -52,8 +43,8 @@ struct HealthBody {
 #[put("/health", wrap = "Authentication::Private")]
 async fn change_healthyness(
     data: web::Data<Data>,
-    body: web::Json<HealthBody>,
-) -> Result<HttpResponse, Error> {
+    body: web::Json<HealtBody>,
+) -> Result<HttpResponse, ResponseError> {
     if body.health {
         set_healthy(data).await
     } else {

meilisearch-http/src/routes/index.rs

@@ -5,7 +5,7 @@ use log::error;
 use rand::seq::SliceRandom;
 use serde::{Deserialize, Serialize};
 
-use crate::error::Error;
+use crate::error::{Error, ResponseError};
 use crate::helpers::Authentication;
 use crate::routes::IndexParam;
 use crate::Data;
@@ -40,10 +40,9 @@ struct IndexResponse {
 }
 
 #[get("/indexes", wrap = "Authentication::Private")]
-async fn list_indexes(data: web::Data<Data>) -> Result<HttpResponse, Error> {
+async fn list_indexes(data: web::Data<Data>) -> Result<HttpResponse, ResponseError> {
     let reader = data.db.main_read_txn()?;
-
-    let mut response = Vec::new();
+    let mut indexes = Vec::new();
 
     for index_uid in data.db.indexes_uids() {
         let index = data.db.open_index(&index_uid);
@@ -81,7 +80,7 @@ async fn list_indexes(data: web::Data<Data>) -> Result<HttpResponse, Error> {
                     updated_at,
                     primary_key,
                 };
-                response.push(index_response);
+                indexes.push(index_response);
             }
             None => error!(
                 "Index {} is referenced in the indexes list but cannot be found",
@@ -90,21 +89,20 @@ async fn list_indexes(data: web::Data<Data>) -> Result<HttpResponse, Error> {
         }
     }
 
-    Ok(HttpResponse::Ok().json(response))
+    Ok(HttpResponse::Ok().json(indexes))
 }
 
 #[get("/indexes/{index_uid}", wrap = "Authentication::Private")]
 async fn get_index(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
         .ok_or(Error::index_not_found(&path.index_uid))?;
 
     let reader = data.db.main_read_txn()?;
-
     let name = index.main.name(&reader)?.ok_or(Error::internal(
             "Impossible to get the name of an index",
     ))?;
@@ -128,14 +126,15 @@ async fn get_index(
         },
         _ => None,
     };
-
-    Ok(HttpResponse::Ok().json(IndexResponse {
+    let index_response = IndexResponse {
         name,
         uid: path.index_uid.clone(),
         created_at,
         updated_at,
         primary_key,
-    }))
+    };
+
+    Ok(HttpResponse::Ok().json(index_response))
 }
 
 #[derive(Debug, Deserialize)]
@@ -150,11 +149,11 @@ struct IndexCreateRequest {
 async fn create_index(
     data: web::Data<Data>,
     body: web::Json<IndexCreateRequest>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     if let (None, None) = (body.name.clone(), body.uid.clone()) {
         return Err(Error::bad_request(
             "Index creation must have an uid",
-        ));
+        ).into());
     }
 
     let uid = match &body.uid {
@@ -165,7 +164,7 @@ async fn create_index(
             {
                 uid.to_owned()
             } else {
-                return Err(Error::InvalidIndexUid);
+                return Err(Error::InvalidIndexUid.into());
             }
         }
         None => loop {
@@ -181,8 +180,7 @@ async fn create_index(
         .create_index(&uid)
         .map_err(Error::create_index)?;
 
-    let mut writer = data.db.main_write_txn()?;
-
+    let index_response = data.db.main_write::<_, _, ResponseError>(|mut writer| {
         let name = body.name.as_ref().unwrap_or(&uid);
         created_index.main.put_name(&mut writer, name)?;
 
@@ -204,16 +202,17 @@ async fn create_index(
                 created_index.main.put_schema(&mut writer, &schema)?;
             }
         }
-
-    writer.commit()?;
-
-    Ok(HttpResponse::Created().json(IndexResponse {
+        let index_response = IndexResponse {
             name: name.to_string(),
             uid,
             created_at,
             updated_at,
             primary_key: body.primary_key.clone(),
-    }))
+        };
+        Ok(index_response)
+    })?;
+
+    Ok(HttpResponse::Created().json(index_response))
 }
 
 #[derive(Debug, Deserialize)]
@@ -238,14 +237,13 @@ async fn update_index(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
     body: web::Json<IndexCreateRequest>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
         .ok_or(Error::index_not_found(&path.index_uid))?;
 
-    let mut writer = data.db.main_write_txn()?;
-
+    data.db.main_write::<_, _, ResponseError>(|mut writer| {
         if let Some(name) = &body.name {
             index.main.put_name(&mut writer, name)?;
         }
@@ -256,7 +254,7 @@ async fn update_index(
                     Some(_) => {
                         return Err(Error::bad_request(
                                 "The primary key cannot be updated",
-                    ));
+                        ).into());
                     }
                     None => {
                         schema.set_primary_key(&id)?;
@@ -265,12 +263,11 @@ async fn update_index(
                 }
             }
         }
-
         index.main.put_updated_at(&mut writer)?;
-    writer.commit()?;
+        Ok(())
+    })?;
 
     let reader = data.db.main_read_txn()?;
-
     let name = index.main.name(&reader)?.ok_or(Error::internal(
             "Impossible to get the name of an index",
     ))?;
@@ -295,20 +292,22 @@ async fn update_index(
         _ => None,
     };
 
-    Ok(HttpResponse::Ok().json(IndexResponse {
+    let index_response = IndexResponse {
         name,
         uid: path.index_uid.clone(),
         created_at,
         updated_at,
         primary_key,
-    }))
+    };
+
+    Ok(HttpResponse::Ok().json(index_response))
 }
 
 #[delete("/indexes/{index_uid}", wrap = "Authentication::Private")]
 async fn delete_index(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     data.db.delete_index(&path.index_uid)?;
 
     Ok(HttpResponse::NoContent().finish())
@@ -327,7 +326,7 @@ struct UpdateParam {
 async fn get_update_status(
     data: web::Data<Data>,
     path: web::Path<UpdateParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -342,7 +341,7 @@ async fn get_update_status(
         None => Err(Error::NotFound(format!(
             "Update {} not found",
             path.update_id
-        ))),
+        )).into()),
     }
 }
 
@@ -350,7 +349,7 @@ async fn get_update_status(
 async fn get_all_updates_status(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)

meilisearch-http/src/routes/search.rs

@@ -7,7 +7,7 @@ use actix_web_macros::get;
 use serde::Deserialize;
 use serde_json::Value;
 
-use crate::error::{Error, FacetCountError};
+use crate::error::{Error, FacetCountError, ResponseError};
 use crate::helpers::meilisearch::IndexSearchExt;
 use crate::helpers::Authentication;
 use crate::routes::IndexParam;
@@ -41,14 +41,13 @@ async fn search_with_url_query(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
     params: web::Query<SearchQuery>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
         .ok_or(Error::index_not_found(&path.index_uid))?;
 
     let reader = data.db.main_read_txn()?;
-
     let schema = index
         .main
         .schema(&reader)?
@@ -88,9 +87,9 @@ async fn search_with_url_query(
     }
 
     if let Some(ref facet_filters) = params.facet_filters {
-        match index.main.attributes_for_faceting(&reader)? {
-            Some(ref attrs) => { search_builder.add_facet_filters(FacetFilter::from_str(facet_filters, &schema, attrs)?); },
-            None => return Err(Error::FacetExpression("can't filter on facets, as no facet is set".to_string()))
+        let attrs = index.main.attributes_for_faceting(&reader)?;
+        if let Some(attrs) = attrs {
+            search_builder.add_facet_filters(FacetFilter::from_str(facet_filters, &schema, &attrs)?);
         }
     }
 
@@ -100,7 +99,7 @@ async fn search_with_url_query(
                 let field_ids = prepare_facet_list(&facets, &schema, attrs)?;
                 search_builder.add_facets(field_ids);
             },
-            None => return Err(FacetCountError::NoFacetSet.into())
+            None => todo!() /* return Err(FacetCountError::NoFacetSet.into()) */
         }
     }
 
@@ -160,8 +159,9 @@ async fn search_with_url_query(
             search_builder.get_matches();
         }
     }
+    let search_result = search_builder.search(&reader)?;
 
-    Ok(HttpResponse::Ok().json(search_builder.search(&reader)?))
+    Ok(HttpResponse::Ok().json(search_result))
 }
 
 /// Parses the incoming string into an array of attributes for which to return a count. It returns

meilisearch-http/src/routes/setting.rs

@@ -3,7 +3,7 @@ use actix_web_macros::{delete, get, post};
 use meilisearch_core::settings::{Settings, SettingsUpdate, UpdateState, DEFAULT_RANKING_RULES};
 use std::collections::{BTreeMap, BTreeSet, HashSet};
 
-use crate::error::Error;
+use crate::error::{Error, ResponseError};
 use crate::helpers::Authentication;
 use crate::routes::{IndexParam, IndexUpdateResponse};
 use crate::Data;
@@ -33,19 +33,20 @@ async fn update_all(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
     body: web::Json<Settings>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
         .ok_or(Error::index_not_found(&path.index_uid))?;
 
-    let mut writer = data.db.update_write_txn()?;
+    let update_id = data.db.update_write::<_, _, ResponseError>(|mut writer| {
         let settings = body
             .into_inner()
             .into_update()
             .map_err(Error::bad_request)?;
         let update_id = index.settings_update(&mut writer, settings)?;
-    writer.commit()?;
+        Ok(update_id)
+    })?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
 }
@@ -54,7 +55,7 @@ async fn update_all(
 async fn get_all(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -62,20 +63,22 @@ async fn get_all(
 
     let reader = data.db.main_read_txn()?;
 
-    let stop_words_fst = index.main.stop_words_fst(&reader)?;
-    let stop_words = stop_words_fst.stream().into_strs()?;
-    let stop_words: BTreeSet<String> = stop_words.into_iter().collect();
+    let stop_words: BTreeSet<String> = index
+        .main
+        .stop_words_list(&reader)?
+        .into_iter()
+        .collect();
 
-    let synonyms_fst = index.main.synonyms_fst(&reader)?;
-    let synonyms_list = synonyms_fst.stream().into_strs()?;
+    let synonyms_list = index.main.synonyms_list(&reader)?;
 
     let mut synonyms = BTreeMap::new();
     let index_synonyms = &index.synonyms;
     for synonym in synonyms_list {
         let alternative_list = index_synonyms.synonyms(&reader, synonym.as_bytes())?;
-        let list = alternative_list.stream().into_strs()?;
+        if let Some(list) = alternative_list {
             synonyms.insert(synonym, list);
         }
+    }
 
     let ranking_rules = index
         .main
@@ -134,12 +137,11 @@ async fn get_all(
 async fn delete_all(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
         .ok_or(Error::index_not_found(&path.index_uid))?;
-    let mut writer = data.db.update_write_txn()?;
 
     let settings = SettingsUpdate {
         ranking_rules: UpdateState::Clear,
@@ -153,8 +155,10 @@ async fn delete_all(
         attributes_for_faceting: UpdateState::Clear,
     };
 
-    let update_id = index.settings_update(&mut writer, settings)?;
-    writer.commit()?;
+    let update_id = data.db.update_write::<_, _, ResponseError>(|writer| {
+        let update_id = index.settings_update(writer, settings)?;
+        Ok(update_id)
+    })?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
 }
@@ -166,7 +170,7 @@ async fn delete_all(
 async fn get_rules(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -192,7 +196,7 @@ async fn update_rules(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
     body: web::Json<Option<Vec<String>>>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -203,10 +207,12 @@ async fn update_rules(
         ..Settings::default()
     };
 
-    let mut writer = data.db.update_write_txn()?;
     let settings = settings.into_update().map_err(Error::bad_request)?;
+
+    let update_id = data.db.update_write::<_, _, ResponseError>(|mut writer| {
         let update_id = index.settings_update(&mut writer, settings)?;
-    writer.commit()?;
+        Ok(update_id)
+    })?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
 }
@@ -218,21 +224,21 @@ async fn update_rules(
 async fn delete_rules(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
         .ok_or(Error::index_not_found(&path.index_uid))?;
-    let mut writer = data.db.update_write_txn()?;
 
     let settings = SettingsUpdate {
         ranking_rules: UpdateState::Clear,
         ..SettingsUpdate::default()
     };
 
+    let update_id = data.db.update_write::<_, _, ResponseError>(|mut writer| {
         let update_id = index.settings_update(&mut writer, settings)?;
-
-    writer.commit()?;
+        Ok(update_id)
+    })?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
 }
@@ -244,7 +250,7 @@ async fn delete_rules(
 async fn get_distinct(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -263,7 +269,7 @@ async fn update_distinct(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
     body: web::Json<Option<String>>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -274,10 +280,12 @@ async fn update_distinct(
         ..Settings::default()
     };
 
-    let mut writer = data.db.update_write_txn()?;
     let settings = settings.into_update().map_err(Error::bad_request)?;
+
+    let update_id = data.db.update_write::<_, _, ResponseError>(|mut writer| {
         let update_id = index.settings_update(&mut writer, settings)?;
-    writer.commit()?;
+        Ok(update_id)
+    })?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
 }
@@ -289,21 +297,21 @@ async fn update_distinct(
 async fn delete_distinct(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
         .ok_or(Error::index_not_found(&path.index_uid))?;
-    let mut writer = data.db.update_write_txn()?;
 
     let settings = SettingsUpdate {
         distinct_attribute: UpdateState::Clear,
         ..SettingsUpdate::default()
     };
 
+    let update_id = data.db.update_write::<_, _, ResponseError>(|mut writer| {
         let update_id = index.settings_update(&mut writer, settings)?;
-
-    writer.commit()?;
+        Ok(update_id)
+    })?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
 }
@@ -315,7 +323,7 @@ async fn delete_distinct(
 async fn get_searchable(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -336,7 +344,7 @@ async fn update_searchable(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
     body: web::Json<Option<Vec<String>>>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -347,10 +355,12 @@ async fn update_searchable(
         ..Settings::default()
     };
 
-    let mut writer = data.db.update_write_txn()?;
     let settings = settings.into_update().map_err(Error::bad_request)?;
+
+    let update_id = data.db.update_write::<_, _, ResponseError>(|mut writer| {
         let update_id = index.settings_update(&mut writer, settings)?;
-    writer.commit()?;
+        Ok(update_id)
+    })?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
 }
@@ -362,7 +372,7 @@ async fn update_searchable(
 async fn delete_searchable(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -373,9 +383,10 @@ async fn delete_searchable(
         ..SettingsUpdate::default()
     };
 
-    let mut writer = data.db.update_write_txn()?;
+    let update_id = data.db.update_write::<_, _, ResponseError>(|mut writer| {
         let update_id = index.settings_update(&mut writer, settings)?;
-    writer.commit()?;
+        Ok(update_id)
+    })?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
 }
@@ -387,7 +398,7 @@ async fn delete_searchable(
 async fn get_displayed(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -410,7 +421,7 @@ async fn update_displayed(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
     body: web::Json<Option<HashSet<String>>>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -421,10 +432,12 @@ async fn update_displayed(
         ..Settings::default()
     };
 
-    let mut writer = data.db.update_write_txn()?;
     let settings = settings.into_update().map_err(Error::bad_request)?;
+
+    let update_id = data.db.update_write::<_, _, ResponseError>(|mut writer| {
         let update_id = index.settings_update(&mut writer, settings)?;
-    writer.commit()?;
+        Ok(update_id)
+    })?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
 }
@@ -436,7 +449,7 @@ async fn update_displayed(
 async fn delete_displayed(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -447,9 +460,10 @@ async fn delete_displayed(
         ..SettingsUpdate::default()
     };
 
-    let mut writer = data.db.update_write_txn()?;
+    let update_id = data.db.update_write::<_, _, ResponseError>(|mut writer| {
         let update_id = index.settings_update(&mut writer, settings)?;
-    writer.commit()?;
+        Ok(update_id)
+    })?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
 }
@@ -461,7 +475,7 @@ async fn delete_displayed(
 async fn get_accept_new_fields(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -483,7 +497,7 @@ async fn update_accept_new_fields(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
     body: web::Json<Option<bool>>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -494,10 +508,12 @@ async fn update_accept_new_fields(
         ..Settings::default()
     };
 
-    let mut writer = data.db.update_write_txn()?;
     let settings = settings.into_update().map_err(Error::bad_request)?;
+
+    let update_id = data.db.update_write::<_, _, ResponseError>(|mut writer| {
         let update_id = index.settings_update(&mut writer, settings)?;
-    writer.commit()?;
+        Ok(update_id)
+    })?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
 }

meilisearch-http/src/routes/stats.rs

@@ -10,7 +10,7 @@ use serde::Serialize;
 use sysinfo::{NetworkExt, ProcessExt, ProcessorExt, System, SystemExt};
 use walkdir::WalkDir;
 
-use crate::error::Error;
+use crate::error::{Error, ResponseError};
 use crate::helpers::Authentication;
 use crate::routes::IndexParam;
 use crate::Data;
@@ -35,7 +35,7 @@ struct IndexStatsResponse {
 async fn index_stats(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -71,7 +71,7 @@ struct StatsResult {
 }
 
 #[get("/stats", wrap = "Authentication::Private")]
-async fn get_stats(data: web::Data<Data>) -> Result<HttpResponse, Error> {
+async fn get_stats(data: web::Data<Data>) -> Result<HttpResponse, ResponseError> {
     let mut index_list = HashMap::new();
 
     let reader = data.db.main_read_txn()?;
@@ -111,7 +111,7 @@ async fn get_stats(data: web::Data<Data>) -> Result<HttpResponse, Error> {
         .filter(|metadata| metadata.is_file())
         .fold(0, |acc, m| acc + m.len());
 
-    let last_update = data.last_update(&reader)?;
+    let last_update = data.db.last_update(&reader)?;
 
     Ok(HttpResponse::Ok().json(StatsResult {
         database_size,

meilisearch-http/src/routes/stop_words.rs

@@ -3,7 +3,7 @@ use actix_web_macros::{delete, get, post};
 use meilisearch_core::settings::{SettingsUpdate, UpdateState};
 use std::collections::BTreeSet;
 
-use crate::error::Error;
+use crate::error::{Error, ResponseError};
 use crate::helpers::Authentication;
 use crate::routes::{IndexParam, IndexUpdateResponse};
 use crate::Data;
@@ -19,14 +19,13 @@ pub fn services(cfg: &mut web::ServiceConfig) {
 async fn get(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
         .ok_or(Error::index_not_found(&path.index_uid))?;
     let reader = data.db.main_read_txn()?;
-    let stop_words_fst = index.main.stop_words_fst(&reader)?;
-    let stop_words = stop_words_fst.stream().into_strs()?;
+    let stop_words = index.main.stop_words_list(&reader)?;
 
     Ok(HttpResponse::Ok().json(stop_words))
 }
@@ -39,7 +38,7 @@ async fn update(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
     body: web::Json<BTreeSet<String>>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -50,9 +49,10 @@ async fn update(
         ..SettingsUpdate::default()
     };
 
-    let mut writer = data.db.update_write_txn()?;
+    let update_id = data.db.update_write::<_, _, ResponseError>(|mut writer| {
         let update_id = index.settings_update(&mut writer, settings)?;
-    writer.commit()?;
+        Ok(update_id)
+    })?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
 }
@@ -64,7 +64,7 @@ async fn update(
 async fn delete(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -75,9 +75,10 @@ async fn delete(
         ..SettingsUpdate::default()
     };
 
-    let mut writer = data.db.update_write_txn()?;
+    let update_id = data.db.update_write::<_, _, ResponseError>(|mut writer| {
         let update_id = index.settings_update(&mut writer, settings)?;
-    writer.commit()?;
+        Ok(update_id)
+    })?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
 }

meilisearch-http/src/routes/synonym.rs

@@ -5,7 +5,7 @@ use actix_web_macros::{delete, get, post};
 use indexmap::IndexMap;
 use meilisearch_core::settings::{SettingsUpdate, UpdateState};
 
-use crate::error::Error;
+use crate::error::{Error, ResponseError};
 use crate::helpers::Authentication;
 use crate::routes::{IndexParam, IndexUpdateResponse};
 use crate::Data;
@@ -21,7 +21,7 @@ pub fn services(cfg: &mut web::ServiceConfig) {
 async fn get(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -29,16 +29,16 @@ async fn get(
 
     let reader = data.db.main_read_txn()?;
 
-    let synonyms_fst = index.main.synonyms_fst(&reader)?;
-    let synonyms_list = synonyms_fst.stream().into_strs()?;
+    let synonyms_list = index.main.synonyms_list(&reader)?;
 
     let mut synonyms = IndexMap::new();
     let index_synonyms = &index.synonyms;
     for synonym in synonyms_list {
         let alternative_list = index_synonyms.synonyms(&reader, synonym.as_bytes())?;
-        let list = alternative_list.stream().into_strs()?;
+        if let Some(list) = alternative_list {
             synonyms.insert(synonym, list);
         }
+    }
 
     Ok(HttpResponse::Ok().json(synonyms))
 }
@@ -51,7 +51,7 @@ async fn update(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
     body: web::Json<BTreeMap<String, Vec<String>>>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -62,9 +62,10 @@ async fn update(
         ..SettingsUpdate::default()
     };
 
-    let mut writer = data.db.update_write_txn()?;
+    let update_id = data.db.update_write::<_, _, ResponseError>(|mut writer| {
         let update_id = index.settings_update(&mut writer, settings)?;
-    writer.commit()?;
+        Ok(update_id)
+    })?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
 }
@@ -76,7 +77,7 @@ async fn update(
 async fn delete(
     data: web::Data<Data>,
     path: web::Path<IndexParam>,
-) -> Result<HttpResponse, Error> {
+) -> Result<HttpResponse, ResponseError> {
     let index = data
         .db
         .open_index(&path.index_uid)
@@ -87,10 +88,10 @@ async fn delete(
         ..SettingsUpdate::default()
     };
 
-    let mut writer = data.db.update_write_txn()?;
+    let update_id = data.db.update_write::<_, _, ResponseError>(|mut writer| {
         let update_id = index.settings_update(&mut writer, settings)?;
-
-    writer.commit()?;
+        Ok(update_id)
+    })?;
 
     Ok(HttpResponse::Accepted().json(IndexUpdateResponse::with_id(update_id)))
 }

meilisearch-http/tests/documents_delete.rs

@@ -21,6 +21,7 @@ async fn delete_batch() {
     server.populate_movies().await;
 
     let (_response, status_code) = server.get_document(419704).await;
+    println!("{:?}", _response);
     assert_eq!(status_code, 200);
 
     let body = serde_json::json!([419704, 512200, 181812]);

meilisearch-schema/Cargo.toml

@@ -8,6 +8,7 @@ edition = "2018"
 [dependencies]
 bincode = "1.2.1"
 indexmap = { version = "1.3.2", features = ["serde-1"] }
+meilisearch-error = { path = "../meilisearch-error", version = "0.10.1" }
 serde = { version = "1.0.105", features = ["derive"] }
 serde_json = { version = "1.0.50", features = ["preserve_order"] }
 toml = { version = "0.5.6", features = ["preserve_order"] }

meilisearch-schema/src/error.rs

@@ -1,6 +1,7 @@
-
 use std::{error, fmt};
 
+use meilisearch_error::{ErrorCode, Code};
+
 pub type SResult<T> = Result<T, Error>;
 
 #[derive(Debug)]
@@ -22,3 +23,9 @@ impl fmt::Display for Error {
 }
 
 impl error::Error for Error {}
+
+impl ErrorCode for Error {
+    fn error_code(&self) -> Code {
+        unimplemented!()
+    }
+}