Add support for seq values

meilisearch-core/src/serde/convert_to_string.rs

@@ -8,7 +8,7 @@ pub struct ConvertToString;
 impl ser::Serializer for ConvertToString {
     type Ok = String;
     type Error = SerializerError;
-    type SerializeSeq = ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeSeq = SeqConvertToString;
     type SerializeTuple = ser::Impossible<Self::Ok, Self::Error>;
     type SerializeTupleStruct = ser::Impossible<Self::Ok, Self::Error>;
     type SerializeTupleVariant = ser::Impossible<Self::Ok, Self::Error>;
@@ -135,8 +135,8 @@ impl ser::Serializer for ConvertToString {
     }
 
     fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
-        Err(SerializerError::UnserializableType {
-            type_name: "sequence",
+        Ok(SeqConvertToString {
+            text: String::new(),
         })
     }
 
@@ -254,3 +254,26 @@ impl ser::SerializeStruct for StructConvertToString {
         Ok(self.text)
     }
 }
+
+pub struct SeqConvertToString {
+    text: String,
+}
+
+impl ser::SerializeSeq for SeqConvertToString {
+    type Ok = String;
+    type Error = SerializerError;
+
+    fn serialize_element<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 end(self) -> Result<Self::Ok, Self::Error> {
+        Ok(self.text)
+    }
+}

meilisearch-http/tests/documents_add.rs

@@ -30,7 +30,7 @@ fn check_add_documents_with_primary_key_param() {
     let update_id = response["updateId"].as_u64().unwrap();
     server.wait_update_id(update_id);
 
-    // 3 - Check update sucess
+    // 3 - Check update success
 
     let (response, status_code) = server.get_update_status(update_id);
     assert_eq!(status_code, 200);
@@ -70,7 +70,7 @@ fn check_add_documents_with_nested_boolean() {
     let update_id = response["updateId"].as_u64().unwrap();
     server.wait_update_id(update_id);
 
-    // 3 - Check update sucess
+    // 3 - Check update success
 
     let (response, status_code) = server.get_update_status(update_id);
     assert_eq!(status_code, 200);
@@ -105,9 +105,56 @@ fn check_add_documents_with_nested_null() {
     let update_id = response["updateId"].as_u64().unwrap();
     server.wait_update_id(update_id);
 
-    // 3 - Check update sucess
+    // 3 - Check update success
 
     let (response, status_code) = server.get_update_status(update_id);
     assert_eq!(status_code, 200);
     assert_eq!(response["status"], "processed");
 }
+
+// Test issue https://github.com/meilisearch/MeiliSearch/issues/574
+#[test]
+fn check_add_documents_with_nested_sequence() {
+    let mut server = common::Server::with_uid("tasks");
+
+    // 1 - Create the index with no primary_key
+
+    let body = json!({ "uid": "tasks" });
+    let (response, status_code) = server.create_index(body);
+    assert_eq!(status_code, 201);
+    assert_eq!(response["primaryKey"], json!(null));
+
+    // 2 - Add a document that contains a seq in a nested object
+
+    let body = json!([{ 
+        "id": 0, 
+        "foo": { 
+            "bar": [123],
+            "fez": [{
+                "id": 255,
+                "baz": "leesz",
+                "fuzz": {
+                    "fax": [234]
+                }
+            }]
+        }
+    }]);
+
+    let url = "/indexes/tasks/documents";
+    let (response, status_code) = server.post_request(&url, body.clone());
+    eprintln!("{:#?}", response);
+    assert_eq!(status_code, 202);
+    let update_id = response["updateId"].as_u64().unwrap();
+    server.wait_update_id(update_id);
+
+    // 3 - Check update success
+
+    let (response, status_code) = server.get_update_status(update_id);
+    assert_eq!(status_code, 200);
+    assert_eq!(response["status"], "processed");
+
+    let url = "/indexes/tasks/search?q=leesz";
+    let (response, status_code) = server.get_request(&url);
+    assert_eq!(status_code, 200);
+    assert_eq!(response["hits"], body);
+}