Ignoring fields to send to the server

[Enhed]

I need a mechanism for marking fields so that they are not sent to the server. For example id, date_created, date_updated and other fields that should be loaded locally, but cannot be send(edited by rules) on the server. Is there any way I can implement this with the current mechanisms?

[frank06]

If those were relationships you could use the annotation @DataRelationship(serialize: false) but unfortunately there is no such thing for attributes yet. You can override serialize and remove those fields from the JSON map.

[Enhed]

if serialize method work only before send data to remote its good solution, thx

[Enhed]

1. Create BaseRepository by https://flutterdata.dev/docs/models/#polymorphic-models :

abstract class BaseRepository<T extends BaseRepository<T>> extends DataModel<T>{
  @JsonKey(ignore: true) List<String> get ignoreSerializeFields;
}

2. Extends real repository:

part 'todo.g.dart';

@JsonSerializable(anyMap: true)
@DataRepository([BaseAdapter, ItemsAdapter])
class Todo extends BaseRepository<Todo> {
  @override
  @JsonKey(includeIfNull: false) final String? id;
  final String title;
  final bool completed;

  @JsonKey(includeIfNull: false) final Map<String, dynamic>? meta;
  @JsonKey(name: 'date_created', includeIfNull: false) final DateTime? dateCreated;
  @JsonKey(name: 'date_updated', includeIfNull: false) final DateTime? dateUpdated;

  Todo({this.id, required this.title, this.completed = false, this.dateCreated, this.dateUpdated, this.meta});

  Todo toggleCompleted() {
    return Todo(title: title, id: id, meta: meta, completed: !completed).withKeyOf(this);
  }

  @override
  final List<String> ignoreSerializeFields = [
    'meta', 'id', 'date_created', 'date_updated'
  ];
}

3. Update adapter:

mixin ItemsAdapter <T extends DataModel<T>> on RemoteAdapter<T> {
  @override
  Future<Map<String, dynamic>> serialize(model, {bool withRelationships = true}) async {
    final result = await super.serialize(model, withRelationships: withRelationships);

    if(model is BaseRepository) {
      final fields = (model as BaseRepository).ignoreSerializeFields;
      fields.forEach((field) => result.remove(field));
    }

    return result;
  }
}

woks fine :)

[frank06]

Clever!