review the internal schema to allow to create schema without identifier; fix #513

meilisearch-core/src/database.rs

@@ -8,6 +8,7 @@ use crossbeam_channel::{Receiver, Sender};
 use heed::types::{Str, Unit};
 use heed::{CompactionOption, Result as ZResult};
 use log::debug;
+use meilisearch_schema::Schema;
 
 use crate::{store, update, Index, MResult};
 
@@ -242,6 +243,7 @@ impl Database {
                 index.main.put_name(&mut writer, name)?;
                 index.main.put_created_at(&mut writer)?;
                 index.main.put_updated_at(&mut writer)?;
+                index.main.put_schema(&mut writer, &Schema::new())?;
 
                 let env_clone = self.env.clone();
                 let update_env_clone = self.update_env.clone();

meilisearch-core/src/update/documents_addition.rs

@@ -115,7 +115,7 @@ pub fn apply_documents_addition<'a, 'b>(
         None => return Err(Error::SchemaMissing),
     };
 
-    let identifier = schema.identifier();
+    let identifier = schema.identifier().ok_or(Error::MissingIdentifier)?;
 
     // 1. store documents ids for future deletion
     for document in addition {
@@ -184,7 +184,7 @@ pub fn apply_documents_partial_addition<'a, 'b>(
         None => return Err(Error::SchemaMissing),
     };
 
-    let identifier = schema.identifier();
+    let identifier = schema.identifier().ok_or(Error::MissingIdentifier)?;
 
     // 1. store documents ids for future deletion
     for mut document in addition {

meilisearch-core/src/update/documents_deletion.rs

@@ -40,7 +40,7 @@ impl DocumentsDeletion {
     where
         D: serde::Serialize,
     {
-        let identifier = schema.identifier();
+        let identifier = schema.identifier().ok_or(Error::MissingIdentifier)?;
         let document_id = match extract_document_id(&identifier, &document)? {
             Some(id) => id,
             None => return Err(Error::MissingDocumentId),

meilisearch-http/src/routes/document.rs

@@ -1,7 +1,6 @@
 use std::collections::{BTreeSet, HashSet};
 
 use indexmap::IndexMap;
-use meilisearch_schema::Schema;
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
 use tide::{Request, Response};
@@ -134,10 +133,11 @@ async fn update_multiple_documents(mut ctx: Request<Data>, is_partial: bool) ->
     let query: UpdateDocumentsQuery = ctx.query().unwrap_or_default();
 
     let db = &ctx.state().db;
-    let reader = db.main_read_txn()?;
 
-    let current_schema = index.main.schema(&reader)?;
+    let reader = db.main_read_txn()?;
-    if current_schema.is_none() {
+    let mut schema = index.main.schema(&reader)?.ok_or(ResponseError::internal("schema not found"))?;
+
+    if schema.identifier().is_none() {
         let id = match query.identifier {
             Some(id) => id,
             None => match data.first().and_then(|docs| find_identifier(docs)) {
@@ -145,10 +145,13 @@ async fn update_multiple_documents(mut ctx: Request<Data>, is_partial: bool) ->
                 None => return Err(ResponseError::bad_request("Could not infer a schema")),
             },
         };
+
+        if schema.set_identifier(&id).is_ok() {
             let mut writer = db.main_write_txn()?;
-        index.main.put_schema(&mut writer, &Schema::with_identifier(&id))?;
+            index.main.put_schema(&mut writer, &schema)?;
             writer.commit()?;
         }
+    }
 
     let mut document_addition = if is_partial {
         index.documents_partial_addition()

meilisearch-http/src/routes/index.rs

@@ -1,7 +1,6 @@
 use chrono::{DateTime, Utc};
 use log::error;
 use meilisearch_core::ProcessedUpdateResult;
-use meilisearch_schema::Schema;
 use rand::seq::SliceRandom;
 use serde::{Deserialize, Serialize};
 use serde_json::json;
@@ -41,7 +40,10 @@ pub async fn list_indexes(ctx: Request<Data>) -> SResult<Response> {
                 let updated_at = index.main.updated_at(&reader)?.into_internal_error()?;
 
                 let identifier = match index.main.schema(&reader) {
-                    Ok(Some(schema)) => Some(schema.identifier().to_owned()),
+                    Ok(Some(schema)) => match schema.identifier() {
+                        Some(identifier) => Some(identifier.to_owned()),
+                        None => None
+                    },
                     _ => None,
                 };
 
@@ -88,7 +90,10 @@ pub async fn get_index(ctx: Request<Data>) -> SResult<Response> {
     let updated_at = index.main.updated_at(&reader)?.into_internal_error()?;
 
     let identifier = match index.main.schema(&reader) {
-        Ok(Some(schema)) => Some(schema.identifier().to_owned()),
+        Ok(Some(schema)) => match schema.identifier() {
+            Some(identifier) => Some(identifier.to_owned()),
+            None => None
+        },
         _ => None,
     };
 
@@ -171,9 +176,11 @@ pub async fn create_index(mut ctx: Request<Data>) -> SResult<Response> {
         .into_internal_error()?;
 
     if let Some(id) = body.identifier.clone() {
-        created_index
+        if let Some(mut schema) = created_index.main.schema(&mut writer)? {
-            .main
+            if let Ok(_) = schema.set_identifier(&id) {
-            .put_schema(&mut writer, &Schema::with_identifier(&id))?;
+                created_index.main.put_schema(&mut writer, &schema)?;
+            }
+        }
     }
 
     writer.commit()?;
@@ -224,15 +231,19 @@ pub async fn update_index(mut ctx: Request<Data>) -> SResult<Response> {
         index.main.put_name(&mut writer, &name)?;
     }
 
-    if let Some(identifier) = body.identifier {
+    if let Some(id) = body.identifier.clone() {
-        if let Ok(Some(_)) = index.main.schema(&writer) {
+        if let Some(mut schema) = index.main.schema(&mut writer)? {
-            return Err(ResponseError::bad_request(
+            match schema.identifier() {
-                "The index identifier cannot be updated",
+                Some(_) => {
-            ));
+                    return Err(ResponseError::bad_request("The index identifier cannot be updated"));
+                },
+                None => {
+                    if let Ok(_) = schema.set_identifier(&id) {
+                        index.main.put_schema(&mut writer, &schema)?;
+                    }
+                }
+            }
         }
-        index
-            .main
-            .put_schema(&mut writer, &Schema::with_identifier(&identifier))?;
     }
 
     index.main.put_updated_at(&mut writer)?;
@@ -244,7 +255,15 @@ pub async fn update_index(mut ctx: Request<Data>) -> SResult<Response> {
     let updated_at = index.main.updated_at(&reader)?.into_internal_error()?;
 
     let identifier = match index.main.schema(&reader) {
-        Ok(Some(schema)) => Some(schema.identifier().to_owned()),
+        Ok(Some(schema)) => {
+            match schema.identifier() {
+                Some(identifier) => {
+                    Some(identifier.to_owned())
+                },
+                None => None
+            }
+
+        },
         _ => None,
     };
 

meilisearch-http/src/routes/setting.rs

@@ -50,11 +50,7 @@ pub async fn get_all(ctx: Request<Data>) -> SResult<Response> {
             .iter()
             .map(|s| (*s).to_string())
             .collect::<Vec<String>>();
-        if attrs.is_empty() {
-            None
-        } else {
         Some(attrs)
-        }
     });
 
     let displayed_attributes = schema.clone().map(|s| {
@@ -63,11 +59,7 @@ pub async fn get_all(ctx: Request<Data>) -> SResult<Response> {
             .iter()
             .map(|s| (*s).to_string())
             .collect::<HashSet<String>>();
-        if attrs.is_empty() {
-            None
-        } else {
         Some(attrs)
-        }
     });
     let accept_new_fields = schema.map(|s| s.accept_new_fields());
 

meilisearch-http/tests/common.rs

@@ -57,7 +57,7 @@ impl Server {
             block_on(res.into_body().read_to_end(&mut buf)).unwrap();
             let response: Value = serde_json::from_slice(&buf).unwrap();
 
-            if response["status"] == "processed" {
+            if response["status"] == "processed" || response["status"] == "error" {
                 eprintln!("{:#?}", response);
                 return;
             }

meilisearch-http/tests/index.rs

@@ -8,31 +8,28 @@ fn create_index_with_name() {
     let mut server = common::Server::with_uid("movies");
 
     // 1 - Create a new index
-    // Index with only a name "movies"
-    // POST: /indexes
 
     let body = json!({
         "name": "movies",
     });
 
     let (res1_value, status_code) = server.create_index(body);
+
     assert_eq!(status_code, 201);
     assert_eq!(res1_value.as_object().unwrap().len(), 5);
     let r1_name = res1_value["name"].as_str().unwrap();
     let r1_uid = res1_value["uid"].as_str().unwrap();
     let r1_created_at = res1_value["createdAt"].as_str().unwrap();
     let r1_updated_at = res1_value["updatedAt"].as_str().unwrap();
-
     assert_eq!(r1_name, "movies");
     assert_eq!(r1_uid.len(), 8);
     assert!(r1_created_at.len() > 1);
     assert!(r1_updated_at.len() > 1);
 
     // 2 - Check the list of indexes
-    // Must have 1 index with the exact same content that the request 1
-    // GET: /indexes
 
     let (res2_value, status_code) = server.list_indexes();
+
     assert_eq!(status_code, 200);
     assert_eq!(res2_value.as_array().unwrap().len(), 1);
     assert_eq!(res2_value[0].as_object().unwrap().len(), 5);
@@ -40,7 +37,6 @@ fn create_index_with_name() {
     let r2_uid = res2_value[0]["uid"].as_str().unwrap();
     let r2_created_at = res2_value[0]["createdAt"].as_str().unwrap();
     let r2_updated_at = res2_value[0]["updatedAt"].as_str().unwrap();
-
     assert_eq!(r2_name, r1_name);
     assert_eq!(r2_uid.len(), r1_uid.len());
     assert_eq!(r2_created_at.len(), r1_created_at.len());
@@ -52,31 +48,28 @@ fn create_index_with_uid() {
     let mut server = common::Server::with_uid("movies");
 
     // 1 - Create a new index
-    // Index with only an uid "movies"
-    // POST: /indexes
 
     let body = json!({
         "uid": "movies",
     });
 
     let (res1_value, status_code) = server.create_index(body);
+
     assert_eq!(status_code, 201);
     assert_eq!(res1_value.as_object().unwrap().len(), 5);
     let r1_name = res1_value["name"].as_str().unwrap();
     let r1_uid = res1_value["uid"].as_str().unwrap();
     let r1_created_at = res1_value["createdAt"].as_str().unwrap();
     let r1_updated_at = res1_value["updatedAt"].as_str().unwrap();
-
     assert_eq!(r1_name, "movies");
     assert_eq!(r1_uid, "movies");
     assert!(r1_created_at.len() > 1);
     assert!(r1_updated_at.len() > 1);
 
     // 2 - Check the list of indexes
-    // Must have 1 index with the exact same content that the request 1
-    // GET: /indexes
 
     let (res2_value, status_code) = server.list_indexes();
+
     assert_eq!(status_code, 200);
     assert_eq!(res2_value.as_array().unwrap().len(), 1);
     assert_eq!(res2_value[0].as_object().unwrap().len(), 5);
@@ -84,7 +77,6 @@ fn create_index_with_uid() {
     let r2_uid = res2_value[0]["uid"].as_str().unwrap();
     let r2_created_at = res2_value[0]["createdAt"].as_str().unwrap();
     let r2_updated_at = res2_value[0]["updatedAt"].as_str().unwrap();
-
     assert_eq!(r2_name, r1_name);
     assert_eq!(r2_uid, r1_uid);
     assert_eq!(r2_created_at.len(), r1_created_at.len());
@@ -96,41 +88,35 @@ fn create_index_with_name_and_uid() {
     let mut server = common::Server::with_uid("movies");
 
     // 1 - Create a new index
-    // Index with a name "Films" and an uid "fn_movies"
-    // POST: /indexes
 
     let body = json!({
         "name": "Films",
         "uid": "fr_movies",
     });
     let (res1_value, status_code) = server.create_index(body);
-    assert_eq!(status_code, 201);
 
+    assert_eq!(status_code, 201);
     assert_eq!(res1_value.as_object().unwrap().len(), 5);
     let r1_name = res1_value["name"].as_str().unwrap();
     let r1_uid = res1_value["uid"].as_str().unwrap();
     let r1_created_at = res1_value["createdAt"].as_str().unwrap();
     let r1_updated_at = res1_value["updatedAt"].as_str().unwrap();
-
     assert_eq!(r1_name, "Films");
     assert_eq!(r1_uid, "fr_movies");
     assert!(r1_created_at.len() > 1);
     assert!(r1_updated_at.len() > 1);
 
     // 2 - Check the list of indexes
-    // Must have 1 index with the exact same content that the request 1
-    // GET: /indexes
 
     let (res2_value, status_code) = server.list_indexes();
-    assert_eq!(status_code, 200);
 
+    assert_eq!(status_code, 200);
     assert_eq!(res2_value.as_array().unwrap().len(), 1);
     assert_eq!(res2_value[0].as_object().unwrap().len(), 5);
     let r2_name = res2_value[0]["name"].as_str().unwrap();
     let r2_uid = res2_value[0]["uid"].as_str().unwrap();
     let r2_created_at = res2_value[0]["createdAt"].as_str().unwrap();
     let r2_updated_at = res2_value[0]["updatedAt"].as_str().unwrap();
-
     assert_eq!(r2_name, r1_name);
     assert_eq!(r2_uid, r1_uid);
     assert_eq!(r2_created_at.len(), r1_created_at.len());
@@ -140,9 +126,8 @@ fn create_index_with_name_and_uid() {
 #[test]
 fn rename_index() {
     let mut server = common::Server::with_uid("movies");
+
     // 1 - Create a new index
-    // Index with only a name "movies"
-    // POST: /indexes
 
     let body = json!({
         "name": "movies",
@@ -150,55 +135,48 @@ fn rename_index() {
     });
 
     let (res1_value, status_code) = server.create_index(body);
-    assert_eq!(status_code, 201);
 
+    assert_eq!(status_code, 201);
     assert_eq!(res1_value.as_object().unwrap().len(), 5);
     let r1_name = res1_value["name"].as_str().unwrap();
     let r1_uid = res1_value["uid"].as_str().unwrap();
     let r1_created_at = res1_value["createdAt"].as_str().unwrap();
     let r1_updated_at = res1_value["updatedAt"].as_str().unwrap();
-
     assert_eq!(r1_name, "movies");
     assert_eq!(r1_uid.len(), 6);
     assert!(r1_created_at.len() > 1);
     assert!(r1_updated_at.len() > 1);
 
     // 2 - Update an index name
-    // Update "movies" to "TV Shows"
-    // PUT: /indexes/:uid
 
     let body = json!({
         "name": "TV Shows",
     });
 
     let (res2_value, status_code) = server.update_index(body);
-    assert_eq!(status_code, 200);
 
+    assert_eq!(status_code, 200);
     assert_eq!(res2_value.as_object().unwrap().len(), 5);
     let r2_name = res2_value["name"].as_str().unwrap();
     let r2_uid = res2_value["uid"].as_str().unwrap();
     let r2_created_at = res2_value["createdAt"].as_str().unwrap();
     let r2_updated_at = res2_value["updatedAt"].as_str().unwrap();
-
     assert_eq!(r2_name, "TV Shows");
     assert_eq!(r2_uid, r1_uid);
     assert_eq!(r2_created_at, r1_created_at);
     assert!(r2_updated_at.len() > 1);
 
     // 3 - Check the list of indexes
-    // Must have 1 index with the exact same content that the request 2
-    // GET: /indexes
 
     let (res3_value, status_code) = server.list_indexes();
-    assert_eq!(status_code, 200);
 
+    assert_eq!(status_code, 200);
     assert_eq!(res3_value.as_array().unwrap().len(), 1);
     assert_eq!(res3_value[0].as_object().unwrap().len(), 5);
     let r3_name = res3_value[0]["name"].as_str().unwrap();
     let r3_uid = res3_value[0]["uid"].as_str().unwrap();
     let r3_created_at = res3_value[0]["createdAt"].as_str().unwrap();
     let r3_updated_at = res3_value[0]["updatedAt"].as_str().unwrap();
-
     assert_eq!(r3_name, r2_name);
     assert_eq!(r3_uid.len(), r1_uid.len());
     assert_eq!(r3_created_at.len(), r1_created_at.len());
@@ -210,8 +188,6 @@ fn delete_index_and_recreate_it() {
     let mut server = common::Server::with_uid("movies");
 
     // 1 - Create a new index
-    // Index with only a name "movies"
-    // POST: /indexes
 
     let body = json!({
         "name": "movies",
@@ -219,90 +195,76 @@ fn delete_index_and_recreate_it() {
     });
 
     let (res1_value, status_code) = server.create_index(body);
-    assert_eq!(status_code, 201);
 
+    assert_eq!(status_code, 201);
     assert_eq!(res1_value.as_object().unwrap().len(), 5);
     let r1_name = res1_value["name"].as_str().unwrap();
     let r1_uid = res1_value["uid"].as_str().unwrap();
     let r1_created_at = res1_value["createdAt"].as_str().unwrap();
     let r1_updated_at = res1_value["updatedAt"].as_str().unwrap();
-
     assert_eq!(r1_name, "movies");
     assert_eq!(r1_uid.len(), 6);
     assert!(r1_created_at.len() > 1);
     assert!(r1_updated_at.len() > 1);
 
     // 2 - Check the list of indexes
-    // Must have 1 index with the exact same content that the request 1
-    // GET: /indexes
 
     let (res2_value, status_code) = server.list_indexes();
-    assert_eq!(status_code, 200);
 
+    assert_eq!(status_code, 200);
     assert_eq!(res2_value.as_array().unwrap().len(), 1);
     assert_eq!(res2_value[0].as_object().unwrap().len(), 5);
     let r2_name = res2_value[0]["name"].as_str().unwrap();
     let r2_uid = res2_value[0]["uid"].as_str().unwrap();
     let r2_created_at = res2_value[0]["createdAt"].as_str().unwrap();
     let r2_updated_at = res2_value[0]["updatedAt"].as_str().unwrap();
-
     assert_eq!(r2_name, r1_name);
     assert_eq!(r2_uid.len(), r1_uid.len());
     assert_eq!(r2_created_at.len(), r1_created_at.len());
     assert_eq!(r2_updated_at.len(), r1_updated_at.len());
 
     // 3- Delete an index
-    // Update "movies" to "TV Shows"
-    // DELETE: /indexes/:uid
 
     let (_res2_value, status_code) = server.delete_index();
+
     assert_eq!(status_code, 204);
 
     // 4 - Check the list of indexes
-    // Must have 0 index
-    // GET: /indexes
 
     let (res2_value, status_code) = server.list_indexes();
-    assert_eq!(status_code, 200);
 
+    assert_eq!(status_code, 200);
     assert_eq!(res2_value.as_array().unwrap().len(), 0);
 
     // 5 - Create a new index
-    // Index with only a name "movies"
-    // POST: /indexes
 
     let body = json!({
         "name": "movies",
     });
 
     let (res1_value, status_code) = server.create_index(body);
-    assert_eq!(status_code, 201);
 
+    assert_eq!(status_code, 201);
     assert_eq!(res1_value.as_object().unwrap().len(), 5);
     let r1_name = res1_value["name"].as_str().unwrap();
     let r1_uid = res1_value["uid"].as_str().unwrap();
     let r1_created_at = res1_value["createdAt"].as_str().unwrap();
     let r1_updated_at = res1_value["updatedAt"].as_str().unwrap();
-
     assert_eq!(r1_name, "movies");
     assert_eq!(r1_uid.len(), 8);
     assert!(r1_created_at.len() > 1);
     assert!(r1_updated_at.len() > 1);
 
     // 6 - Check the list of indexes
-    // Must have 1 index with the exact same content that the request 1
-    // GET: /indexes
 
     let (res2_value, status_code) = server.list_indexes();
     assert_eq!(status_code, 200);
-
     assert_eq!(res2_value.as_array().unwrap().len(), 1);
     assert_eq!(res2_value[0].as_object().unwrap().len(), 5);
     let r2_name = res2_value[0]["name"].as_str().unwrap();
     let r2_uid = res2_value[0]["uid"].as_str().unwrap();
     let r2_created_at = res2_value[0]["createdAt"].as_str().unwrap();
     let r2_updated_at = res2_value[0]["updatedAt"].as_str().unwrap();
-
     assert_eq!(r2_name, r1_name);
     assert_eq!(r2_uid.len(), r1_uid.len());
     assert_eq!(r2_created_at.len(), r1_created_at.len());
@@ -314,89 +276,75 @@ fn check_multiples_indexes() {
     let mut server = common::Server::with_uid("movies");
 
     // 1 - Create a new index
-    // Index with only a name "movies"
-    // POST: /indexes
 
     let body = json!({
         "name": "movies",
     });
 
     let (res1_value, status_code) = server.create_index(body);
-    assert_eq!(status_code, 201);
 
+    assert_eq!(status_code, 201);
     assert_eq!(res1_value.as_object().unwrap().len(), 5);
     let r1_name = res1_value["name"].as_str().unwrap();
     let r1_uid = res1_value["uid"].as_str().unwrap();
     let r1_created_at = res1_value["createdAt"].as_str().unwrap();
     let r1_updated_at = res1_value["updatedAt"].as_str().unwrap();
-
     assert_eq!(r1_name, "movies");
     assert_eq!(r1_uid.len(), 8);
     assert!(r1_created_at.len() > 1);
     assert!(r1_updated_at.len() > 1);
 
     // 2 - Check the list of indexes
-    // Must have 1 index with the exact same content that the request 1
-    // GET: /indexes
 
     let (res2_value, status_code) = server.list_indexes();
-    assert_eq!(status_code, 200);
 
+    assert_eq!(status_code, 200);
     assert_eq!(res2_value.as_array().unwrap().len(), 1);
     assert_eq!(res2_value[0].as_object().unwrap().len(), 5);
     let r2_0_name = res2_value[0]["name"].as_str().unwrap();
     let r2_0_uid = res2_value[0]["uid"].as_str().unwrap();
     let r2_0_created_at = res2_value[0]["createdAt"].as_str().unwrap();
     let r2_0_updated_at = res2_value[0]["updatedAt"].as_str().unwrap();
-
     assert_eq!(r2_0_name, r1_name);
     assert_eq!(r2_0_uid.len(), r1_uid.len());
     assert_eq!(r2_0_created_at.len(), r1_created_at.len());
     assert_eq!(r2_0_updated_at.len(), r1_updated_at.len());
 
     // 3 - Create a new index
-    // Index with only a name "films"
-    // POST: /indexes
 
     let body = json!({
         "name": "films",
     });
 
     let (res3_value, status_code) = server.create_index(body);
-    assert_eq!(status_code, 201);
 
+    assert_eq!(status_code, 201);
     assert_eq!(res3_value.as_object().unwrap().len(), 5);
     let r3_name = res3_value["name"].as_str().unwrap();
     let r3_uid = res3_value["uid"].as_str().unwrap();
     let r3_created_at = res3_value["createdAt"].as_str().unwrap();
     let r3_updated_at = res3_value["updatedAt"].as_str().unwrap();
-
     assert_eq!(r3_name, "films");
     assert_eq!(r3_uid.len(), 8);
     assert!(r3_created_at.len() > 1);
     assert!(r3_updated_at.len() > 1);
 
     // 4 - Check the list of indexes
-    // Must have 2 index with the exact same content that the request 1 and 3
-    // GET: /indexes
 
     let (res4_value, status_code) = server.list_indexes();
+
     assert_eq!(status_code, 200);
-
     assert_eq!(res4_value.as_array().unwrap().len(), 2);
-
     assert_eq!(res4_value[0].as_object().unwrap().len(), 5);
     let r4_0_name = res4_value[0]["name"].as_str().unwrap();
     let r4_0_uid = res4_value[0]["uid"].as_str().unwrap();
     let r4_0_created_at = res4_value[0]["createdAt"].as_str().unwrap();
     let r4_0_updated_at = res4_value[0]["updatedAt"].as_str().unwrap();
-
     assert_eq!(res4_value[1].as_object().unwrap().len(), 5);
     let r4_1_name = res4_value[1]["name"].as_str().unwrap();
     let r4_1_uid = res4_value[1]["uid"].as_str().unwrap();
     let r4_1_created_at = res4_value[1]["createdAt"].as_str().unwrap();
     let r4_1_updated_at = res4_value[1]["updatedAt"].as_str().unwrap();
-
     if r4_0_name == r1_name {
         assert_eq!(r4_0_name, r1_name);
         assert_eq!(r4_0_uid.len(), r1_uid.len());
@@ -408,7 +356,6 @@ fn check_multiples_indexes() {
         assert_eq!(r4_0_created_at.len(), r3_created_at.len());
         assert_eq!(r4_0_updated_at.len(), r3_updated_at.len());
     }
-
     if r4_1_name == r1_name {
         assert_eq!(r4_1_name, r1_name);
         assert_eq!(r4_1_uid.len(), r1_uid.len());
@@ -427,19 +374,17 @@ fn create_index_failed() {
     let mut server = common::Server::with_uid("movies");
 
     // 2 - Push index creation with empty json body
-    // POST: /indexes
 
     let body = json!({});
 
     let (res_value, status_code) = server.create_index(body);
-    assert_eq!(status_code, 400);
 
+    assert_eq!(status_code, 400);
     let message = res_value["message"].as_str().unwrap();
     assert_eq!(res_value.as_object().unwrap().len(), 1);
     assert_eq!(message, "Index creation must have an uid");
 
     // 3 - Create a index with extra data
-    // POST: /indexes
 
     let body = json!({
         "name": "movies",
@@ -447,14 +392,13 @@ fn create_index_failed() {
     });
 
     let (res_value, status_code) = server.create_index(body);
-    assert_eq!(status_code, 400);
 
+    assert_eq!(status_code, 400);
     let message = res_value["message"].as_str().unwrap();
     assert_eq!(res_value.as_object().unwrap().len(), 1);
     assert_eq!(message, "invalid data");
 
     // 3 - Create a index with wrong data type
-    // POST: /indexes
 
     let body = json!({
         "name": "movies",
@@ -462,8 +406,8 @@ fn create_index_failed() {
     });
 
     let (res_value, status_code) = server.create_index(body);
-    assert_eq!(status_code, 400);
 
+    assert_eq!(status_code, 400);
     let message = res_value["message"].as_str().unwrap();
     assert_eq!(res_value.as_object().unwrap().len(), 1);
     assert_eq!(message, "invalid data");
@@ -476,6 +420,8 @@ fn create_index_failed() {
 fn create_index_with_identifier_and_index() {
     let mut server = common::Server::with_uid("movies");
 
+    // 1 - Create the index
+
     let body = json!({
         "uid": "movies",
         "identifier": "id",
@@ -484,6 +430,8 @@ fn create_index_with_identifier_and_index() {
     let (_response, status_code) = server.create_index(body);
     assert_eq!(status_code, 201);
 
+    // 2 - Add content
+
     let body = json!([{
         "id": 123,
         "text": "The mask"
@@ -491,6 +439,8 @@ fn create_index_with_identifier_and_index() {
 
     server.add_or_replace_multiple_documents(body.clone());
 
+    // 3 - Retreive document
+
     let (response, _status_code) = server.get_document(123);
 
     let expect = json!({
@@ -502,51 +452,181 @@ fn create_index_with_identifier_and_index() {
 }
 
 // Resolve issue https://github.com/meilisearch/MeiliSearch/issues/497
+// Test when the given index uid is not valid
+// Should have a 400 status code
+// Should have the right error message
 #[test]
 fn create_index_with_invalid_uid() {
     let mut server = common::Server::with_uid("");
 
+    // 1 - Create the index with invalid uid
+
     let body = json!({
         "uid": "the movies"
     });
 
     let (response, status_code) = server.create_index(body);
-    assert_eq!(status_code, 400);
 
+    assert_eq!(status_code, 400);
     let message = response["message"].as_str().unwrap();
     assert_eq!(response.as_object().unwrap().len(), 1);
     assert_eq!(message, "Index must have a valid uid; Index uid can be of type integer or string only composed of alphanumeric characters, hyphens (-) and underscores (_).");
 
+    // 2 - Create the index with invalid uid
+
     let body = json!({
         "uid": "%$#"
     });
 
     let (response, status_code) = server.create_index(body);
-    assert_eq!(status_code, 400);
 
+    assert_eq!(status_code, 400);
     let message = response["message"].as_str().unwrap();
     assert_eq!(response.as_object().unwrap().len(), 1);
     assert_eq!(message, "Index must have a valid uid; Index uid can be of type integer or string only composed of alphanumeric characters, hyphens (-) and underscores (_).");
 
+    // 3 - Create the index with invalid uid
+
     let body = json!({
         "uid": "the~movies"
     });
 
     let (response, status_code) = server.create_index(body);
-    assert_eq!(status_code, 400);
 
+    assert_eq!(status_code, 400);
     let message = response["message"].as_str().unwrap();
     assert_eq!(response.as_object().unwrap().len(), 1);
     assert_eq!(message, "Index must have a valid uid; Index uid can be of type integer or string only composed of alphanumeric characters, hyphens (-) and underscores (_).");
 
+    // 4 - Create the index with invalid uid
+
     let body = json!({
         "uid": "🎉"
     });
 
     let (response, status_code) = server.create_index(body);
-    assert_eq!(status_code, 400);
 
+    assert_eq!(status_code, 400);
     let message = response["message"].as_str().unwrap();
     assert_eq!(response.as_object().unwrap().len(), 1);
     assert_eq!(message, "Index must have a valid uid; Index uid can be of type integer or string only composed of alphanumeric characters, hyphens (-) and underscores (_).");
 }
+
+// Test that it's possible to add identifier if it's not already set on index creation
+#[test]
+fn create_index_and_add_indentifier_after() {
+    let mut server = common::Server::with_uid("movies");
+
+    // 1 - Create the index with no identifier
+
+    let body = json!({
+        "uid": "movies",
+    });
+    let (response, status_code) = server.create_index(body);
+    assert_eq!(status_code, 201);
+    assert_eq!(response["identifier"], json!(null));
+
+    // 2 - Update the index and add an identifier.
+
+    let body = json!({
+        "identifier": "id",
+    });
+
+    let (response, status_code) = server.update_index(body);
+    assert_eq!(status_code, 200);
+    eprintln!("response: {:#?}", response);
+    assert_eq!(response["identifier"].as_str().unwrap(), "id");
+
+    // 3 - Get index to verify if the identifier is good
+
+    let (response, status_code) = server.get_index();
+    assert_eq!(status_code, 200);
+    assert_eq!(response["identifier"].as_str().unwrap(), "id");
+
+}
+
+// Test that it's impossible to change the identifier
+#[test]
+fn create_index_and_update_indentifier_after() {
+    let mut server = common::Server::with_uid("movies");
+
+    // 1 - Create the index with no identifier
+
+    let body = json!({
+        "uid": "movies",
+        "identifier": "id",
+    });
+    let (response, status_code) = server.create_index(body);
+    assert_eq!(status_code, 201);
+    assert_eq!(response["identifier"].as_str().unwrap(), "id");
+
+    // 2 - Update the index and add an identifier.
+
+    let body = json!({
+        "identifier": "skuid",
+    });
+
+    let (_response, status_code) = server.update_index(body);
+    assert_eq!(status_code, 400);
+
+    // 3 - Get index to verify if the identifier still the first one
+
+    let (response, status_code) = server.get_index();
+    assert_eq!(status_code, 200);
+    assert_eq!(response["identifier"].as_str().unwrap(), "id");
+}
+
+
+// Test that schema inference work well
+#[test]
+fn create_index_without_identifier_and_add_document() {
+    let mut server = common::Server::with_uid("movies");
+
+    // 1 - Create the index with no identifier
+
+    let body = json!({
+        "uid": "movies",
+    });
+    let (response, status_code) = server.create_index(body);
+    assert_eq!(status_code, 201);
+    assert_eq!(response["identifier"], json!(null));
+
+    // 2 - Add a document
+
+    let body = json!([{
+        "id": 123,
+        "title": "I'm a legend",
+    }]);
+
+    server.add_or_update_multiple_documents(body);
+
+    // 3 - Get index to verify if the identifier is good
+
+    let (response, status_code) = server.get_index();
+    assert_eq!(status_code, 200);
+    assert_eq!(response["identifier"].as_str().unwrap(), "id");
+}
+
+
+// Test search with no identifier
+#[test]
+fn create_index_without_identifier_and_search() {
+    let mut server = common::Server::with_uid("movies");
+
+    // 1 - Create the index with no identifier
+
+    let body = json!({
+        "uid": "movies",
+    });
+    let (response, status_code) = server.create_index(body);
+    assert_eq!(status_code, 201);
+    assert_eq!(response["identifier"], json!(null));
+
+    // 2 - Search
+
+    let query = "q=captain&limit=3";
+
+    let (response, status_code) = server.search(&query);
+    assert_eq!(status_code, 200);
+    assert_eq!(response["hits"].as_array().unwrap().len(), 0);
+}

meilisearch-http/tests/settings.rs

@@ -252,3 +252,73 @@ fn write_all_and_update() {
 
     assert_json_eq!(expected, response, ordered: false);
 }
+
+
+#[test]
+fn test_default_settings() {
+    let mut server = common::Server::with_uid("movies");
+    let body = json!({
+        "uid": "movies",
+    });
+    server.create_index(body);
+
+    // 1 - Get all settings and compare to the previous one
+
+    let body = json!({
+        "rankingRules": [
+            "typo",
+            "words",
+            "proximity",
+            "attribute",
+            "wordsPosition",
+            "exactness"
+        ],
+        "distinctAttribute": null,
+        "searchableAttributes": [],
+        "displayedAttributes": [],
+        "stopWords": [],
+        "synonyms": {},
+        "acceptNewFields": true,
+    });
+
+    let (response, _status_code) = server.get_all_settings();
+
+    assert_json_eq!(body, response, ordered: false);
+}
+
+#[test]
+fn test_default_settings_2() {
+    let mut server = common::Server::with_uid("movies");
+    let body = json!({
+        "uid": "movies",
+        "identifier": "id",
+    });
+    server.create_index(body);
+
+    // 1 - Get all settings and compare to the previous one
+
+    let body = json!({
+        "rankingRules": [
+            "typo",
+            "words",
+            "proximity",
+            "attribute",
+            "wordsPosition",
+            "exactness"
+        ],
+        "distinctAttribute": null,
+        "searchableAttributes": [
+            "id"
+        ],
+        "displayedAttributes": [
+            "id"
+        ],
+        "stopWords": [],
+        "synonyms": {},
+        "acceptNewFields": true,
+    });
+
+    let (response, _status_code) = server.get_all_settings();
+
+    assert_json_eq!(body, response, ordered: false);
+}

meilisearch-schema/src/error.rs

@@ -6,6 +6,7 @@ pub type SResult<T> = Result<T, Error>;
 #[derive(Debug)]
 pub enum Error {
     FieldNameNotFound(String),
+    IdentifierAlreadyPresent,
     MaxFieldsLimitExceeded,
 }
 
@@ -14,6 +15,7 @@ impl fmt::Display for Error {
         use self::Error::*;
         match self {
             FieldNameNotFound(field) => write!(f, "The field {:?} doesn't exist", field),
+            IdentifierAlreadyPresent => write!(f, "The schema already have an identifier. It's impossible to update it"),
             MaxFieldsLimitExceeded => write!(f, "The maximum of possible reattributed field id has been reached"),
         }
     }

meilisearch-schema/src/schema.rs

@@ -6,7 +6,7 @@ use std::collections::{HashMap, HashSet};
 pub struct Schema {
     fields_map: FieldsMap,
 
-    identifier: FieldId,
+    identifier: Option<FieldId>,
     ranked: HashSet<FieldId>,
     displayed: HashSet<FieldId>,
 
@@ -17,6 +17,18 @@ pub struct Schema {
 }
 
 impl Schema {
+    pub fn new() -> Schema {
+        Schema {
+            fields_map: FieldsMap::default(),
+            identifier: None,
+            ranked: HashSet::new(),
+            displayed: HashSet::new(),
+            indexed: Vec::new(),
+            indexed_map: HashMap::new(),
+            accept_new_fields: true,
+        }
+    }
+
     pub fn with_identifier(name: &str) -> Schema {
         let mut fields_map = FieldsMap::default();
         let field_id = fields_map.insert(name).unwrap();
@@ -31,7 +43,7 @@ impl Schema {
 
         Schema {
             fields_map,
-            identifier: field_id,
+            identifier: Some(field_id),
             ranked: HashSet::new(),
             displayed,
             indexed,
@@ -40,18 +52,21 @@ impl Schema {
         }
     }
 
-    pub fn identifier(&self) -> &str {
+    pub fn identifier(&self) -> Option<&str> {
-        self.fields_map.name(self.identifier).unwrap()
+        self.identifier.map(|id| self.fields_map.name(id).unwrap())
     }
 
-    pub fn set_identifier(&mut self, id: &str) -> SResult<()> {
+    pub fn set_identifier(&mut self, name: &str) -> SResult<FieldId> {
-        match self.id(id) {
+        if self.identifier.is_some() {
-            Some(id) => {
+            return Err(Error::IdentifierAlreadyPresent)
-                self.identifier = id;
-                Ok(())
-            },
-            None => Err(Error::FieldNameNotFound(id.to_string()))
         }
+
+        let id = self.insert(name)?;
+        self.identifier = Some(id);
+        self.set_indexed(name)?;
+        self.set_displayed(name)?;
+
+        Ok(id)
     }
 
     pub fn id(&self, name: &str) -> Option<FieldId> {