fix deserializer

meilisearch-core/src/serde/deserializer.rs

@@ -55,6 +55,7 @@ pub struct Deserializer<'a> {
     pub documents_fields: DocumentsFields,
     pub schema: &'a Schema,
     pub fields: Option<&'a HashSet<FieldId>>,
+    pub displayed: bool,
 }
 
 impl<'de, 'a, 'b> de::Deserializer<'de> for &'b mut Deserializer<'a> {
@@ -93,7 +94,7 @@ impl<'de, 'a, 'b> de::Deserializer<'de> for &'b mut Deserializer<'a> {
                 };
 
                 let is_displayed = self.schema.is_displayed(attr);
-                if is_displayed && self.fields.map_or(true, |f| f.contains(&attr)) {
+                if !self.displayed || (is_displayed && self.fields.map_or(true, |f| f.contains(&attr))) {
                     if let Some(attribute_name) = self.schema.name(attr) {
                         let cursor = Cursor::new(value.to_owned());
                         let ioread = SerdeJsonIoRead::new(cursor);

meilisearch-core/src/store/mod.rs

@@ -243,6 +243,7 @@ impl Index {
             documents_fields: self.documents_fields,
             schema: &schema,
             fields: attributes.as_ref(),
+            displayed: true,
         };
 
         Ok(Option::<T>::deserialize(&mut deserializer)?)

meilisearch-core/src/update/documents_addition.rs

@@ -197,6 +197,7 @@ pub fn apply_addition<'a, 'b>(
                 documents_fields: index.documents_fields,
                 schema: &schema,
                 fields: None,
+                displayed: false,
             };
 
             let old_document = Option::<HashMap<String, Value>>::deserialize(&mut deserializer)?;