type '_$_Location' is not a subtype of type 'Map<String, dynamic>' in type cast

[Velliane]

Hi there,

I finally got to save my data locally, but I encountered a problem using model class with complex object.
I have this error in repository.initialize() after data was saved.

type '_$_Location' is not a subtype of type 'Map<String, dynamic>' in type cast

I think that I probably must do something with serialize/deserialize, but I don't know what.

@freezed
@DataRepository([PlaceAdapter], remote: false)
class Place extends DataModel<Place> with _$Place {
  Place._();

  factory Place({
    required String id,
    required String name,
    required String address,
    required Location location,
  }) = _Place;

  factory Place.fromJson(Map<String, Object?> json) => _$PlaceFromJson(json);
}

@freezed
@DataRepository([])
class Location extends DataModel<Location> with _$Location {
  Location._();

  factory Location({
    required int? id,
    required String type,
    required List<double> coordinates,
  }) = _Location;

  factory Location.fromJson(Map<String, Object?> json) => _$LocationFromJson(json);
}

And my adapter:

mixin PlaceAdapter<Place extends DataModel<Place>> on RemoteAdapter<Place> {

  @override
  String urlForFindOne(id, Map<String, dynamic> params) {
    return "/places/$id";
  }

  @override
  FutureOr<Map<String, String>> get defaultHeaders {
    return {"accept": "application/json"};
  }

  @override
  String get baseUrl => "https://*********";
}

Edit: After more search, seems like it's the same problem as here "https://github.com/flutterdata/flutter_data/issues/182, but I'm not on Flutter Web :/

[frank06]

Is Location a relationship? If so you must use BelongsTo<Location>