Rename MeiliDB into MeiliSearch

meilisearch-core/src/serde/convert_to_number.rs

@@ -0,0 +1,198 @@
+use std::str::FromStr;
+
+use ordered_float::OrderedFloat;
+use serde::ser;
+use serde::Serialize;
+
+use super::SerializerError;
+use crate::Number;
+
+pub struct ConvertToNumber;
+
+impl ser::Serializer for ConvertToNumber {
+    type Ok = Number;
+    type Error = SerializerError;
+    type SerializeSeq = ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeTuple = ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeTupleStruct = ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeTupleVariant = ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeMap = ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeStruct = ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeStructVariant = ser::Impossible<Self::Ok, Self::Error>;
+
+    fn serialize_bool(self, value: bool) -> Result<Self::Ok, Self::Error> {
+        Ok(Number::Unsigned(u64::from(value)))
+    }
+
+    fn serialize_char(self, _value: char) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnrankableType { type_name: "char" })
+    }
+
+    fn serialize_i8(self, value: i8) -> Result<Self::Ok, Self::Error> {
+        Ok(Number::Signed(i64::from(value)))
+    }
+
+    fn serialize_i16(self, value: i16) -> Result<Self::Ok, Self::Error> {
+        Ok(Number::Signed(i64::from(value)))
+    }
+
+    fn serialize_i32(self, value: i32) -> Result<Self::Ok, Self::Error> {
+        Ok(Number::Signed(i64::from(value)))
+    }
+
+    fn serialize_i64(self, value: i64) -> Result<Self::Ok, Self::Error> {
+        Ok(Number::Signed(value))
+    }
+
+    fn serialize_u8(self, value: u8) -> Result<Self::Ok, Self::Error> {
+        Ok(Number::Unsigned(u64::from(value)))
+    }
+
+    fn serialize_u16(self, value: u16) -> Result<Self::Ok, Self::Error> {
+        Ok(Number::Unsigned(u64::from(value)))
+    }
+
+    fn serialize_u32(self, value: u32) -> Result<Self::Ok, Self::Error> {
+        Ok(Number::Unsigned(u64::from(value)))
+    }
+
+    fn serialize_u64(self, value: u64) -> Result<Self::Ok, Self::Error> {
+        Ok(Number::Unsigned(value))
+    }
+
+    fn serialize_f32(self, value: f32) -> Result<Self::Ok, Self::Error> {
+        Ok(Number::Float(OrderedFloat(f64::from(value))))
+    }
+
+    fn serialize_f64(self, value: f64) -> Result<Self::Ok, Self::Error> {
+        Ok(Number::Float(OrderedFloat(value)))
+    }
+
+    fn serialize_str(self, value: &str) -> Result<Self::Ok, Self::Error> {
+        Ok(Number::from_str(value)?)
+    }
+
+    fn serialize_bytes(self, _v: &[u8]) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnrankableType { type_name: "&[u8]" })
+    }
+
+    fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnrankableType {
+            type_name: "Option",
+        })
+    }
+
+    fn serialize_some<T: ?Sized>(self, _value: &T) -> Result<Self::Ok, Self::Error>
+    where
+        T: Serialize,
+    {
+        Err(SerializerError::UnrankableType {
+            type_name: "Option",
+        })
+    }
+
+    fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnrankableType { type_name: "()" })
+    }
+
+    fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnrankableType {
+            type_name: "unit struct",
+        })
+    }
+
+    fn serialize_unit_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+    ) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnrankableType {
+            type_name: "unit variant",
+        })
+    }
+
+    fn serialize_newtype_struct<T: ?Sized>(
+        self,
+        _name: &'static str,
+        value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: Serialize,
+    {
+        value.serialize(self)
+    }
+
+    fn serialize_newtype_variant<T: ?Sized>(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: Serialize,
+    {
+        Err(SerializerError::UnrankableType {
+            type_name: "newtype variant",
+        })
+    }
+
+    fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
+        Err(SerializerError::UnrankableType {
+            type_name: "sequence",
+        })
+    }
+
+    fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
+        Err(SerializerError::UnrankableType { type_name: "tuple" })
+    }
+
+    fn serialize_tuple_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleStruct, Self::Error> {
+        Err(SerializerError::UnrankableType {
+            type_name: "tuple struct",
+        })
+    }
+
+    fn serialize_tuple_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleVariant, Self::Error> {
+        Err(SerializerError::UnrankableType {
+            type_name: "tuple variant",
+        })
+    }
+
+    fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
+        Err(SerializerError::UnrankableType { type_name: "map" })
+    }
+
+    fn serialize_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStruct, Self::Error> {
+        Err(SerializerError::UnrankableType {
+            type_name: "struct",
+        })
+    }
+
+    fn serialize_struct_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStructVariant, Self::Error> {
+        Err(SerializerError::UnrankableType {
+            type_name: "struct variant",
+        })
+    }
+}

meilisearch-core/src/serde/convert_to_string.rs

@@ -0,0 +1,258 @@
+use serde::ser;
+use serde::Serialize;
+
+use super::SerializerError;
+
+pub struct ConvertToString;
+
+impl ser::Serializer for ConvertToString {
+    type Ok = String;
+    type Error = SerializerError;
+    type SerializeSeq = ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeTuple = ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeTupleStruct = ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeTupleVariant = ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeMap = MapConvertToString;
+    type SerializeStruct = StructConvertToString;
+    type SerializeStructVariant = ser::Impossible<Self::Ok, Self::Error>;
+
+    fn serialize_bool(self, _value: bool) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "boolean",
+        })
+    }
+
+    fn serialize_char(self, value: char) -> Result<Self::Ok, Self::Error> {
+        Ok(value.to_string())
+    }
+
+    fn serialize_i8(self, value: i8) -> Result<Self::Ok, Self::Error> {
+        Ok(value.to_string())
+    }
+
+    fn serialize_i16(self, value: i16) -> Result<Self::Ok, Self::Error> {
+        Ok(value.to_string())
+    }
+
+    fn serialize_i32(self, value: i32) -> Result<Self::Ok, Self::Error> {
+        Ok(value.to_string())
+    }
+
+    fn serialize_i64(self, value: i64) -> Result<Self::Ok, Self::Error> {
+        Ok(value.to_string())
+    }
+
+    fn serialize_u8(self, value: u8) -> Result<Self::Ok, Self::Error> {
+        Ok(value.to_string())
+    }
+
+    fn serialize_u16(self, value: u16) -> Result<Self::Ok, Self::Error> {
+        Ok(value.to_string())
+    }
+
+    fn serialize_u32(self, value: u32) -> Result<Self::Ok, Self::Error> {
+        Ok(value.to_string())
+    }
+
+    fn serialize_u64(self, value: u64) -> Result<Self::Ok, Self::Error> {
+        Ok(value.to_string())
+    }
+
+    fn serialize_f32(self, value: f32) -> Result<Self::Ok, Self::Error> {
+        Ok(value.to_string())
+    }
+
+    fn serialize_f64(self, value: f64) -> Result<Self::Ok, Self::Error> {
+        Ok(value.to_string())
+    }
+
+    fn serialize_str(self, value: &str) -> Result<Self::Ok, Self::Error> {
+        Ok(value.to_string())
+    }
+
+    fn serialize_bytes(self, _v: &[u8]) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnserializableType { type_name: "&[u8]" })
+    }
+
+    fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "Option",
+        })
+    }
+
+    fn serialize_some<T: ?Sized>(self, _value: &T) -> Result<Self::Ok, Self::Error>
+    where
+        T: Serialize,
+    {
+        Err(SerializerError::UnserializableType {
+            type_name: "Option",
+        })
+    }
+
+    fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnserializableType { type_name: "()" })
+    }
+
+    fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "unit struct",
+        })
+    }
+
+    fn serialize_unit_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+    ) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "unit variant",
+        })
+    }
+
+    fn serialize_newtype_struct<T: ?Sized>(
+        self,
+        _name: &'static str,
+        value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: Serialize,
+    {
+        value.serialize(self)
+    }
+
+    fn serialize_newtype_variant<T: ?Sized>(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: Serialize,
+    {
+        Err(SerializerError::UnserializableType {
+            type_name: "newtype variant",
+        })
+    }
+
+    fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "sequence",
+        })
+    }
+
+    fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
+        Err(SerializerError::UnserializableType { type_name: "tuple" })
+    }
+
+    fn serialize_tuple_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleStruct, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "tuple struct",
+        })
+    }
+
+    fn serialize_tuple_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleVariant, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "tuple variant",
+        })
+    }
+
+    fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
+        Ok(MapConvertToString {
+            text: String::new(),
+        })
+    }
+
+    fn serialize_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStruct, Self::Error> {
+        Ok(StructConvertToString {
+            text: String::new(),
+        })
+    }
+
+    fn serialize_struct_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStructVariant, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "struct variant",
+        })
+    }
+}
+
+pub struct MapConvertToString {
+    text: String,
+}
+
+impl ser::SerializeMap for MapConvertToString {
+    type Ok = String;
+    type Error = SerializerError;
+
+    fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<(), Self::Error>
+    where
+        T: ser::Serialize,
+    {
+        let text = key.serialize(ConvertToString)?;
+        self.text.push_str(&text);
+        self.text.push_str(" ");
+        Ok(())
+    }
+
+    fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
+    where
+        T: ser::Serialize,
+    {
+        let text = value.serialize(ConvertToString)?;
+        self.text.push_str(&text);
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        Ok(self.text)
+    }
+}
+
+pub struct StructConvertToString {
+    text: String,
+}
+
+impl ser::SerializeStruct for StructConvertToString {
+    type Ok = String;
+    type Error = SerializerError;
+
+    fn serialize_field<T: ?Sized>(
+        &mut self,
+        key: &'static str,
+        value: &T,
+    ) -> Result<(), Self::Error>
+    where
+        T: ser::Serialize,
+    {
+        let value = value.serialize(ConvertToString)?;
+        self.text.push_str(key);
+        self.text.push_str(" ");
+        self.text.push_str(&value);
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        Ok(self.text)
+    }
+}

meilisearch-core/src/serde/deserializer.rs

@@ -0,0 +1,158 @@
+use std::collections::HashSet;
+use std::io::Cursor;
+use std::{error::Error, fmt};
+
+use meilisearch_schema::{Schema, SchemaAttr};
+use serde::{de, forward_to_deserialize_any};
+use serde_json::de::IoRead as SerdeJsonIoRead;
+use serde_json::Deserializer as SerdeJsonDeserializer;
+use serde_json::Error as SerdeJsonError;
+
+use crate::store::DocumentsFields;
+use crate::DocumentId;
+
+#[derive(Debug)]
+pub enum DeserializerError {
+    SerdeJson(SerdeJsonError),
+    Zlmdb(heed::Error),
+    Custom(String),
+}
+
+impl de::Error for DeserializerError {
+    fn custom<T: fmt::Display>(msg: T) -> Self {
+        DeserializerError::Custom(msg.to_string())
+    }
+}
+
+impl fmt::Display for DeserializerError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            DeserializerError::SerdeJson(e) => write!(f, "serde json related error: {}", e),
+            DeserializerError::Zlmdb(e) => write!(f, "heed related error: {}", e),
+            DeserializerError::Custom(s) => f.write_str(s),
+        }
+    }
+}
+
+impl Error for DeserializerError {}
+
+impl From<SerdeJsonError> for DeserializerError {
+    fn from(error: SerdeJsonError) -> DeserializerError {
+        DeserializerError::SerdeJson(error)
+    }
+}
+
+impl From<heed::Error> for DeserializerError {
+    fn from(error: heed::Error) -> DeserializerError {
+        DeserializerError::Zlmdb(error)
+    }
+}
+
+pub struct Deserializer<'a> {
+    pub document_id: DocumentId,
+    pub reader: &'a heed::RoTxn,
+    pub documents_fields: DocumentsFields,
+    pub schema: &'a Schema,
+    pub attributes: Option<&'a HashSet<SchemaAttr>>,
+}
+
+impl<'de, 'a, 'b> de::Deserializer<'de> for &'b mut Deserializer<'a> {
+    type Error = DeserializerError;
+
+    fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
+    where
+        V: de::Visitor<'de>,
+    {
+        self.deserialize_option(visitor)
+    }
+
+    fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Self::Error>
+    where
+        V: de::Visitor<'de>,
+    {
+        self.deserialize_map(visitor)
+    }
+
+    fn deserialize_map<V>(self, visitor: V) -> Result<V::Value, Self::Error>
+    where
+        V: de::Visitor<'de>,
+    {
+        let mut error = None;
+
+        let iter = self
+            .documents_fields
+            .document_fields(self.reader, self.document_id)?
+            .filter_map(|result| {
+                let (attr, value) = match result {
+                    Ok(value) => value,
+                    Err(e) => {
+                        error = Some(e);
+                        return None;
+                    }
+                };
+
+                let is_displayed = self.schema.props(attr).is_displayed();
+                if is_displayed && self.attributes.map_or(true, |f| f.contains(&attr)) {
+                    let attribute_name = self.schema.attribute_name(attr);
+
+                    let cursor = Cursor::new(value.to_owned());
+                    let ioread = SerdeJsonIoRead::new(cursor);
+                    let value = Value(SerdeJsonDeserializer::new(ioread));
+
+                    Some((attribute_name, value))
+                } else {
+                    None
+                }
+            });
+
+        let mut iter = iter.peekable();
+
+        let result = match iter.peek() {
+            Some(_) => {
+                let map_deserializer = de::value::MapDeserializer::new(iter);
+                visitor
+                    .visit_some(map_deserializer)
+                    .map_err(DeserializerError::from)
+            }
+            None => visitor.visit_none(),
+        };
+
+        match error.take() {
+            Some(error) => Err(error.into()),
+            None => result,
+        }
+    }
+
+    forward_to_deserialize_any! {
+        bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string
+        bytes byte_buf unit unit_struct newtype_struct seq tuple
+        tuple_struct struct enum identifier ignored_any
+    }
+}
+
+struct Value(SerdeJsonDeserializer<SerdeJsonIoRead<Cursor<Vec<u8>>>>);
+
+impl<'de> de::IntoDeserializer<'de, SerdeJsonError> for Value {
+    type Deserializer = Self;
+
+    fn into_deserializer(self) -> Self::Deserializer {
+        self
+    }
+}
+
+impl<'de> de::Deserializer<'de> for Value {
+    type Error = SerdeJsonError;
+
+    fn deserialize_any<V>(mut self, visitor: V) -> Result<V::Value, Self::Error>
+    where
+        V: de::Visitor<'de>,
+    {
+        self.0.deserialize_any(visitor)
+    }
+
+    forward_to_deserialize_any! {
+        bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string
+        bytes byte_buf option unit unit_struct newtype_struct seq tuple
+        tuple_struct map struct enum identifier ignored_any
+    }
+}

meilisearch-core/src/serde/extract_document_id.rs

@@ -0,0 +1,295 @@
+use std::hash::{Hash, Hasher};
+
+use crate::DocumentId;
+use serde::{ser, Serialize};
+use serde_json::Value;
+use siphasher::sip::SipHasher;
+
+use super::{ConvertToString, SerializerError};
+
+pub fn extract_document_id<D>(
+    identifier: &str,
+    document: &D,
+) -> Result<Option<DocumentId>, SerializerError>
+where
+    D: serde::Serialize,
+{
+    let serializer = ExtractDocumentId { identifier };
+    document.serialize(serializer)
+}
+
+pub fn value_to_string(value: &Value) -> Option<String> {
+    match value {
+        Value::Null => None,
+        Value::Bool(_) => None,
+        Value::Number(value) => Some(value.to_string()),
+        Value::String(value) => Some(value.to_string()),
+        Value::Array(_) => None,
+        Value::Object(_) => None,
+    }
+}
+
+pub fn compute_document_id<H: Hash>(t: H) -> DocumentId {
+    let mut s = SipHasher::new();
+    t.hash(&mut s);
+    let hash = s.finish();
+    DocumentId(hash)
+}
+
+struct ExtractDocumentId<'a> {
+    identifier: &'a str,
+}
+
+impl<'a> ser::Serializer for ExtractDocumentId<'a> {
+    type Ok = Option<DocumentId>;
+    type Error = SerializerError;
+    type SerializeSeq = ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeTuple = ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeTupleStruct = ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeTupleVariant = ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeMap = ExtractDocumentIdMapSerializer<'a>;
+    type SerializeStruct = ExtractDocumentIdStructSerializer<'a>;
+    type SerializeStructVariant = ser::Impossible<Self::Ok, Self::Error>;
+
+    forward_to_unserializable_type! {
+        bool => serialize_bool,
+        char => serialize_char,
+
+        i8  => serialize_i8,
+        i16 => serialize_i16,
+        i32 => serialize_i32,
+        i64 => serialize_i64,
+
+        u8  => serialize_u8,
+        u16 => serialize_u16,
+        u32 => serialize_u32,
+        u64 => serialize_u64,
+
+        f32 => serialize_f32,
+        f64 => serialize_f64,
+    }
+
+    fn serialize_str(self, _value: &str) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnserializableType { type_name: "str" })
+    }
+
+    fn serialize_bytes(self, _value: &[u8]) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnserializableType { type_name: "&[u8]" })
+    }
+
+    fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "Option",
+        })
+    }
+
+    fn serialize_some<T: ?Sized>(self, _value: &T) -> Result<Self::Ok, Self::Error>
+    where
+        T: Serialize,
+    {
+        Err(SerializerError::UnserializableType {
+            type_name: "Option",
+        })
+    }
+
+    fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnserializableType { type_name: "()" })
+    }
+
+    fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "unit struct",
+        })
+    }
+
+    fn serialize_unit_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+    ) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "unit variant",
+        })
+    }
+
+    fn serialize_newtype_struct<T: ?Sized>(
+        self,
+        _name: &'static str,
+        value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: Serialize,
+    {
+        value.serialize(self)
+    }
+
+    fn serialize_newtype_variant<T: ?Sized>(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: Serialize,
+    {
+        Err(SerializerError::UnserializableType {
+            type_name: "newtype variant",
+        })
+    }
+
+    fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "sequence",
+        })
+    }
+
+    fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
+        Err(SerializerError::UnserializableType { type_name: "tuple" })
+    }
+
+    fn serialize_tuple_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleStruct, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "tuple struct",
+        })
+    }
+
+    fn serialize_tuple_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleVariant, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "tuple variant",
+        })
+    }
+
+    fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
+        let serializer = ExtractDocumentIdMapSerializer {
+            identifier: self.identifier,
+            document_id: None,
+            current_key_name: None,
+        };
+
+        Ok(serializer)
+    }
+
+    fn serialize_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStruct, Self::Error> {
+        let serializer = ExtractDocumentIdStructSerializer {
+            identifier: self.identifier,
+            document_id: None,
+        };
+
+        Ok(serializer)
+    }
+
+    fn serialize_struct_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStructVariant, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "struct variant",
+        })
+    }
+}
+
+pub struct ExtractDocumentIdMapSerializer<'a> {
+    identifier: &'a str,
+    document_id: Option<DocumentId>,
+    current_key_name: Option<String>,
+}
+
+impl<'a> ser::SerializeMap for ExtractDocumentIdMapSerializer<'a> {
+    type Ok = Option<DocumentId>;
+    type Error = SerializerError;
+
+    fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<(), Self::Error>
+    where
+        T: Serialize,
+    {
+        let key = key.serialize(ConvertToString)?;
+        self.current_key_name = Some(key);
+        Ok(())
+    }
+
+    fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
+    where
+        T: Serialize,
+    {
+        let key = self.current_key_name.take().unwrap();
+        self.serialize_entry(&key, value)
+    }
+
+    fn serialize_entry<K: ?Sized, V: ?Sized>(
+        &mut self,
+        key: &K,
+        value: &V,
+    ) -> Result<(), Self::Error>
+    where
+        K: Serialize,
+        V: Serialize,
+    {
+        let key = key.serialize(ConvertToString)?;
+
+        if self.identifier == key {
+            let value = serde_json::to_string(value).and_then(|s| serde_json::from_str(&s))?;
+            match value_to_string(&value).map(|s| compute_document_id(&s)) {
+                Some(document_id) => self.document_id = Some(document_id),
+                None => return Err(SerializerError::InvalidDocumentIdType),
+            }
+        }
+
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        Ok(self.document_id)
+    }
+}
+
+pub struct ExtractDocumentIdStructSerializer<'a> {
+    identifier: &'a str,
+    document_id: Option<DocumentId>,
+}
+
+impl<'a> ser::SerializeStruct for ExtractDocumentIdStructSerializer<'a> {
+    type Ok = Option<DocumentId>;
+    type Error = SerializerError;
+
+    fn serialize_field<T: ?Sized>(
+        &mut self,
+        key: &'static str,
+        value: &T,
+    ) -> Result<(), Self::Error>
+    where
+        T: Serialize,
+    {
+        if self.identifier == key {
+            let value = serde_json::to_string(value).and_then(|s| serde_json::from_str(&s))?;
+            match value_to_string(&value).map(compute_document_id) {
+                Some(document_id) => self.document_id = Some(document_id),
+                None => return Err(SerializerError::InvalidDocumentIdType),
+            }
+        }
+
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        Ok(self.document_id)
+    }
+}

meilisearch-core/src/serde/indexer.rs

@@ -0,0 +1,365 @@
+use meilisearch_schema::SchemaAttr;
+use serde::ser;
+use serde::Serialize;
+
+use super::{ConvertToString, SerializerError};
+use crate::raw_indexer::RawIndexer;
+use crate::DocumentId;
+
+pub struct Indexer<'a> {
+    pub attribute: SchemaAttr,
+    pub indexer: &'a mut RawIndexer,
+    pub document_id: DocumentId,
+}
+
+impl<'a> ser::Serializer for Indexer<'a> {
+    type Ok = Option<usize>;
+    type Error = SerializerError;
+    type SerializeSeq = SeqIndexer<'a>;
+    type SerializeTuple = TupleIndexer<'a>;
+    type SerializeTupleStruct = ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeTupleVariant = ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeMap = MapIndexer<'a>;
+    type SerializeStruct = StructIndexer<'a>;
+    type SerializeStructVariant = ser::Impossible<Self::Ok, Self::Error>;
+
+    fn serialize_bool(self, _value: bool) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnindexableType {
+            type_name: "boolean",
+        })
+    }
+
+    fn serialize_char(self, value: char) -> Result<Self::Ok, Self::Error> {
+        let text = value.serialize(ConvertToString)?;
+        self.serialize_str(&text)
+    }
+
+    fn serialize_i8(self, value: i8) -> Result<Self::Ok, Self::Error> {
+        let text = value.serialize(ConvertToString)?;
+        self.serialize_str(&text)
+    }
+
+    fn serialize_i16(self, value: i16) -> Result<Self::Ok, Self::Error> {
+        let text = value.serialize(ConvertToString)?;
+        self.serialize_str(&text)
+    }
+
+    fn serialize_i32(self, value: i32) -> Result<Self::Ok, Self::Error> {
+        let text = value.serialize(ConvertToString)?;
+        self.serialize_str(&text)
+    }
+
+    fn serialize_i64(self, value: i64) -> Result<Self::Ok, Self::Error> {
+        let text = value.serialize(ConvertToString)?;
+        self.serialize_str(&text)
+    }
+
+    fn serialize_u8(self, value: u8) -> Result<Self::Ok, Self::Error> {
+        let text = value.serialize(ConvertToString)?;
+        self.serialize_str(&text)
+    }
+
+    fn serialize_u16(self, value: u16) -> Result<Self::Ok, Self::Error> {
+        let text = value.serialize(ConvertToString)?;
+        self.serialize_str(&text)
+    }
+
+    fn serialize_u32(self, value: u32) -> Result<Self::Ok, Self::Error> {
+        let text = value.serialize(ConvertToString)?;
+        self.serialize_str(&text)
+    }
+
+    fn serialize_u64(self, value: u64) -> Result<Self::Ok, Self::Error> {
+        let text = value.serialize(ConvertToString)?;
+        self.serialize_str(&text)
+    }
+
+    fn serialize_f32(self, value: f32) -> Result<Self::Ok, Self::Error> {
+        let text = value.serialize(ConvertToString)?;
+        self.serialize_str(&text)
+    }
+
+    fn serialize_f64(self, value: f64) -> Result<Self::Ok, Self::Error> {
+        let text = value.serialize(ConvertToString)?;
+        self.serialize_str(&text)
+    }
+
+    fn serialize_str(self, text: &str) -> Result<Self::Ok, Self::Error> {
+        let number_of_words = self
+            .indexer
+            .index_text(self.document_id, self.attribute, text);
+        Ok(Some(number_of_words))
+    }
+
+    fn serialize_bytes(self, _v: &[u8]) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnindexableType { type_name: "&[u8]" })
+    }
+
+    fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnindexableType {
+            type_name: "Option",
+        })
+    }
+
+    fn serialize_some<T: ?Sized>(self, value: &T) -> Result<Self::Ok, Self::Error>
+    where
+        T: ser::Serialize,
+    {
+        let text = value.serialize(ConvertToString)?;
+        let number_of_words = self
+            .indexer
+            .index_text(self.document_id, self.attribute, &text);
+        Ok(Some(number_of_words))
+    }
+
+    fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnindexableType { type_name: "()" })
+    }
+
+    fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnindexableType {
+            type_name: "unit struct",
+        })
+    }
+
+    fn serialize_unit_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+    ) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnindexableType {
+            type_name: "unit variant",
+        })
+    }
+
+    fn serialize_newtype_struct<T: ?Sized>(
+        self,
+        _name: &'static str,
+        value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: ser::Serialize,
+    {
+        value.serialize(self)
+    }
+
+    fn serialize_newtype_variant<T: ?Sized>(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: ser::Serialize,
+    {
+        Err(SerializerError::UnindexableType {
+            type_name: "newtype variant",
+        })
+    }
+
+    fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
+        let indexer = SeqIndexer {
+            attribute: self.attribute,
+            document_id: self.document_id,
+            indexer: self.indexer,
+            texts: Vec::new(),
+        };
+
+        Ok(indexer)
+    }
+
+    fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
+        let indexer = TupleIndexer {
+            attribute: self.attribute,
+            document_id: self.document_id,
+            indexer: self.indexer,
+            texts: Vec::new(),
+        };
+
+        Ok(indexer)
+    }
+
+    fn serialize_tuple_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleStruct, Self::Error> {
+        Err(SerializerError::UnindexableType {
+            type_name: "tuple struct",
+        })
+    }
+
+    fn serialize_tuple_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleVariant, Self::Error> {
+        Err(SerializerError::UnindexableType {
+            type_name: "tuple variant",
+        })
+    }
+
+    fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
+        let indexer = MapIndexer {
+            attribute: self.attribute,
+            document_id: self.document_id,
+            indexer: self.indexer,
+            texts: Vec::new(),
+        };
+
+        Ok(indexer)
+    }
+
+    fn serialize_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStruct, Self::Error> {
+        Err(SerializerError::UnindexableType {
+            type_name: "struct",
+        })
+    }
+
+    fn serialize_struct_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStructVariant, Self::Error> {
+        Err(SerializerError::UnindexableType {
+            type_name: "struct variant",
+        })
+    }
+}
+
+pub struct SeqIndexer<'a> {
+    attribute: SchemaAttr,
+    document_id: DocumentId,
+    indexer: &'a mut RawIndexer,
+    texts: Vec<String>,
+}
+
+impl<'a> ser::SerializeSeq for SeqIndexer<'a> {
+    type Ok = Option<usize>;
+    type Error = SerializerError;
+
+    fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
+    where
+        T: ser::Serialize,
+    {
+        let text = value.serialize(ConvertToString)?;
+        self.texts.push(text);
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        let texts = self.texts.iter().map(String::as_str);
+        self.indexer
+            .index_text_seq(self.document_id, self.attribute, texts);
+        Ok(None)
+    }
+}
+
+pub struct MapIndexer<'a> {
+    attribute: SchemaAttr,
+    document_id: DocumentId,
+    indexer: &'a mut RawIndexer,
+    texts: Vec<String>,
+}
+
+impl<'a> ser::SerializeMap for MapIndexer<'a> {
+    type Ok = Option<usize>;
+    type Error = SerializerError;
+
+    fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<(), Self::Error>
+    where
+        T: ser::Serialize,
+    {
+        let text = key.serialize(ConvertToString)?;
+        self.texts.push(text);
+        Ok(())
+    }
+
+    fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
+    where
+        T: ser::Serialize,
+    {
+        let text = value.serialize(ConvertToString)?;
+        self.texts.push(text);
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        let texts = self.texts.iter().map(String::as_str);
+        self.indexer
+            .index_text_seq(self.document_id, self.attribute, texts);
+        Ok(None)
+    }
+}
+
+pub struct StructIndexer<'a> {
+    attribute: SchemaAttr,
+    document_id: DocumentId,
+    indexer: &'a mut RawIndexer,
+    texts: Vec<String>,
+}
+
+impl<'a> ser::SerializeStruct for StructIndexer<'a> {
+    type Ok = Option<usize>;
+    type Error = SerializerError;
+
+    fn serialize_field<T: ?Sized>(
+        &mut self,
+        key: &'static str,
+        value: &T,
+    ) -> Result<(), Self::Error>
+    where
+        T: ser::Serialize,
+    {
+        let key_text = key.to_owned();
+        let value_text = value.serialize(ConvertToString)?;
+        self.texts.push(key_text);
+        self.texts.push(value_text);
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        let texts = self.texts.iter().map(String::as_str);
+        self.indexer
+            .index_text_seq(self.document_id, self.attribute, texts);
+        Ok(None)
+    }
+}
+
+pub struct TupleIndexer<'a> {
+    attribute: SchemaAttr,
+    document_id: DocumentId,
+    indexer: &'a mut RawIndexer,
+    texts: Vec<String>,
+}
+
+impl<'a> ser::SerializeTuple for TupleIndexer<'a> {
+    type Ok = Option<usize>;
+    type Error = SerializerError;
+
+    fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
+    where
+        T: Serialize,
+    {
+        let text = value.serialize(ConvertToString)?;
+        self.texts.push(text);
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        let texts = self.texts.iter().map(String::as_str);
+        self.indexer
+            .index_text_seq(self.document_id, self.attribute, texts);
+        Ok(None)
+    }
+}

meilisearch-core/src/serde/mod.rs

@@ -0,0 +1,103 @@
+macro_rules! forward_to_unserializable_type {
+    ($($ty:ident => $se_method:ident,)*) => {
+        $(
+            fn $se_method(self, _v: $ty) -> Result<Self::Ok, Self::Error> {
+                Err(SerializerError::UnserializableType { type_name: "$ty" })
+            }
+        )*
+    }
+}
+
+mod convert_to_number;
+mod convert_to_string;
+mod deserializer;
+mod extract_document_id;
+mod indexer;
+mod serializer;
+
+pub use self::convert_to_number::ConvertToNumber;
+pub use self::convert_to_string::ConvertToString;
+pub use self::deserializer::{Deserializer, DeserializerError};
+pub use self::extract_document_id::{compute_document_id, extract_document_id, value_to_string};
+pub use self::indexer::Indexer;
+pub use self::serializer::{serialize_value, Serializer};
+
+use std::{error::Error, fmt};
+
+use serde::ser;
+use serde_json::Error as SerdeJsonError;
+
+use crate::ParseNumberError;
+
+#[derive(Debug)]
+pub enum SerializerError {
+    DocumentIdNotFound,
+    InvalidDocumentIdType,
+    Zlmdb(heed::Error),
+    SerdeJson(SerdeJsonError),
+    ParseNumber(ParseNumberError),
+    UnserializableType { type_name: &'static str },
+    UnindexableType { type_name: &'static str },
+    UnrankableType { type_name: &'static str },
+    Custom(String),
+}
+
+impl ser::Error for SerializerError {
+    fn custom<T: fmt::Display>(msg: T) -> Self {
+        SerializerError::Custom(msg.to_string())
+    }
+}
+
+impl fmt::Display for SerializerError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            SerializerError::DocumentIdNotFound => {
+                f.write_str("serialized document does not have an id according to the schema")
+            }
+            SerializerError::InvalidDocumentIdType => {
+                f.write_str("document identifier can only be of type string or number")
+            }
+            SerializerError::Zlmdb(e) => write!(f, "heed related error: {}", e),
+            SerializerError::SerdeJson(e) => write!(f, "serde json error: {}", e),
+            SerializerError::ParseNumber(e) => {
+                write!(f, "error while trying to parse a number: {}", e)
+            }
+            SerializerError::UnserializableType { type_name } => {
+                write!(f, "{} is not a serializable type", type_name)
+            }
+            SerializerError::UnindexableType { type_name } => {
+                write!(f, "{} is not an indexable type", type_name)
+            }
+            SerializerError::UnrankableType { type_name } => {
+                write!(f, "{} types can not be used for ranking", type_name)
+            }
+            SerializerError::Custom(s) => f.write_str(s),
+        }
+    }
+}
+
+impl Error for SerializerError {}
+
+impl From<String> for SerializerError {
+    fn from(value: String) -> SerializerError {
+        SerializerError::Custom(value)
+    }
+}
+
+impl From<SerdeJsonError> for SerializerError {
+    fn from(error: SerdeJsonError) -> SerializerError {
+        SerializerError::SerdeJson(error)
+    }
+}
+
+impl From<heed::Error> for SerializerError {
+    fn from(error: heed::Error) -> SerializerError {
+        SerializerError::Zlmdb(error)
+    }
+}
+
+impl From<ParseNumberError> for SerializerError {
+    fn from(error: ParseNumberError) -> SerializerError {
+        SerializerError::ParseNumber(error)
+    }
+}

meilisearch-core/src/serde/serializer.rs

@@ -0,0 +1,338 @@
+use meilisearch_schema::{Schema, SchemaAttr, SchemaProps};
+use serde::ser;
+
+use crate::raw_indexer::RawIndexer;
+use crate::store::{DocumentsFields, DocumentsFieldsCounts};
+use crate::{DocumentId, RankedMap};
+
+use super::{ConvertToNumber, ConvertToString, Indexer, SerializerError};
+
+pub struct Serializer<'a, 'b> {
+    pub txn: &'a mut heed::RwTxn<'b>,
+    pub schema: &'a Schema,
+    pub document_store: DocumentsFields,
+    pub document_fields_counts: DocumentsFieldsCounts,
+    pub indexer: &'a mut RawIndexer,
+    pub ranked_map: &'a mut RankedMap,
+    pub document_id: DocumentId,
+}
+
+impl<'a, 'b> ser::Serializer for Serializer<'a, 'b> {
+    type Ok = ();
+    type Error = SerializerError;
+    type SerializeSeq = ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeTuple = ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeTupleStruct = ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeTupleVariant = ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeMap = MapSerializer<'a, 'b>;
+    type SerializeStruct = StructSerializer<'a, 'b>;
+    type SerializeStructVariant = ser::Impossible<Self::Ok, Self::Error>;
+
+    forward_to_unserializable_type! {
+        bool => serialize_bool,
+        char => serialize_char,
+
+        i8  => serialize_i8,
+        i16 => serialize_i16,
+        i32 => serialize_i32,
+        i64 => serialize_i64,
+
+        u8  => serialize_u8,
+        u16 => serialize_u16,
+        u32 => serialize_u32,
+        u64 => serialize_u64,
+
+        f32 => serialize_f32,
+        f64 => serialize_f64,
+    }
+
+    fn serialize_str(self, _v: &str) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnserializableType { type_name: "str" })
+    }
+
+    fn serialize_bytes(self, _v: &[u8]) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnserializableType { type_name: "&[u8]" })
+    }
+
+    fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "Option",
+        })
+    }
+
+    fn serialize_some<T: ?Sized>(self, _value: &T) -> Result<Self::Ok, Self::Error>
+    where
+        T: ser::Serialize,
+    {
+        Err(SerializerError::UnserializableType {
+            type_name: "Option",
+        })
+    }
+
+    fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnserializableType { type_name: "()" })
+    }
+
+    fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "unit struct",
+        })
+    }
+
+    fn serialize_unit_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+    ) -> Result<Self::Ok, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "unit variant",
+        })
+    }
+
+    fn serialize_newtype_struct<T: ?Sized>(
+        self,
+        _name: &'static str,
+        value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: ser::Serialize,
+    {
+        value.serialize(self)
+    }
+
+    fn serialize_newtype_variant<T: ?Sized>(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: ser::Serialize,
+    {
+        Err(SerializerError::UnserializableType {
+            type_name: "newtype variant",
+        })
+    }
+
+    fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "sequence",
+        })
+    }
+
+    fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
+        Err(SerializerError::UnserializableType { type_name: "tuple" })
+    }
+
+    fn serialize_tuple_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleStruct, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "tuple struct",
+        })
+    }
+
+    fn serialize_tuple_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleVariant, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "tuple variant",
+        })
+    }
+
+    fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
+        Ok(MapSerializer {
+            txn: self.txn,
+            schema: self.schema,
+            document_id: self.document_id,
+            document_store: self.document_store,
+            document_fields_counts: self.document_fields_counts,
+            indexer: self.indexer,
+            ranked_map: self.ranked_map,
+            current_key_name: None,
+        })
+    }
+
+    fn serialize_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStruct, Self::Error> {
+        Ok(StructSerializer {
+            txn: self.txn,
+            schema: self.schema,
+            document_id: self.document_id,
+            document_store: self.document_store,
+            document_fields_counts: self.document_fields_counts,
+            indexer: self.indexer,
+            ranked_map: self.ranked_map,
+        })
+    }
+
+    fn serialize_struct_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStructVariant, Self::Error> {
+        Err(SerializerError::UnserializableType {
+            type_name: "struct variant",
+        })
+    }
+}
+
+pub struct MapSerializer<'a, 'b> {
+    txn: &'a mut heed::RwTxn<'b>,
+    schema: &'a Schema,
+    document_id: DocumentId,
+    document_store: DocumentsFields,
+    document_fields_counts: DocumentsFieldsCounts,
+    indexer: &'a mut RawIndexer,
+    ranked_map: &'a mut RankedMap,
+    current_key_name: Option<String>,
+}
+
+impl<'a, 'b> ser::SerializeMap for MapSerializer<'a, 'b> {
+    type Ok = ();
+    type Error = SerializerError;
+
+    fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<(), Self::Error>
+    where
+        T: ser::Serialize,
+    {
+        let key = key.serialize(ConvertToString)?;
+        self.current_key_name = Some(key);
+        Ok(())
+    }
+
+    fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
+    where
+        T: ser::Serialize,
+    {
+        let key = self.current_key_name.take().unwrap();
+        self.serialize_entry(&key, value)
+    }
+
+    fn serialize_entry<K: ?Sized, V: ?Sized>(
+        &mut self,
+        key: &K,
+        value: &V,
+    ) -> Result<(), Self::Error>
+    where
+        K: ser::Serialize,
+        V: ser::Serialize,
+    {
+        let key = key.serialize(ConvertToString)?;
+        match self.schema.attribute(&key) {
+            Some(attribute) => serialize_value(
+                self.txn,
+                attribute,
+                self.schema.props(attribute),
+                self.document_id,
+                self.document_store,
+                self.document_fields_counts,
+                self.indexer,
+                self.ranked_map,
+                value,
+            ),
+            None => Ok(()),
+        }
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        Ok(())
+    }
+}
+
+pub struct StructSerializer<'a, 'b> {
+    txn: &'a mut heed::RwTxn<'b>,
+    schema: &'a Schema,
+    document_id: DocumentId,
+    document_store: DocumentsFields,
+    document_fields_counts: DocumentsFieldsCounts,
+    indexer: &'a mut RawIndexer,
+    ranked_map: &'a mut RankedMap,
+}
+
+impl<'a, 'b> ser::SerializeStruct for StructSerializer<'a, 'b> {
+    type Ok = ();
+    type Error = SerializerError;
+
+    fn serialize_field<T: ?Sized>(
+        &mut self,
+        key: &'static str,
+        value: &T,
+    ) -> Result<(), Self::Error>
+    where
+        T: ser::Serialize,
+    {
+        match self.schema.attribute(key) {
+            Some(attribute) => serialize_value(
+                self.txn,
+                attribute,
+                self.schema.props(attribute),
+                self.document_id,
+                self.document_store,
+                self.document_fields_counts,
+                self.indexer,
+                self.ranked_map,
+                value,
+            ),
+            None => Ok(()),
+        }
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        Ok(())
+    }
+}
+
+pub fn serialize_value<T: ?Sized>(
+    txn: &mut heed::RwTxn,
+    attribute: SchemaAttr,
+    props: SchemaProps,
+    document_id: DocumentId,
+    document_store: DocumentsFields,
+    documents_fields_counts: DocumentsFieldsCounts,
+    indexer: &mut RawIndexer,
+    ranked_map: &mut RankedMap,
+    value: &T,
+) -> Result<(), SerializerError>
+where
+    T: ser::Serialize,
+{
+    let serialized = serde_json::to_vec(value)?;
+    document_store.put_document_field(txn, document_id, attribute, &serialized)?;
+
+    if props.is_indexed() {
+        let indexer = Indexer {
+            attribute,
+            indexer,
+            document_id,
+        };
+        if let Some(number_of_words) = value.serialize(indexer)? {
+            documents_fields_counts.put_document_field_count(
+                txn,
+                document_id,
+                attribute,
+                number_of_words as u64,
+            )?;
+        }
+    }
+
+    if props.is_ranked() {
+        let number = value.serialize(ConvertToNumber)?;
+        ranked_map.insert(document_id, attribute, number);
+    }
+
+    Ok(())
+}