Mobx.dart: [mobx_codegen] Add MST like snapshot functionality to mobx.dart

[vadimtsushko]

I would be great if mobx_codegen emmited some form of serialization/deserialization functions for Observable objects. toJson/fromJson or something like this.

[pavanpodila]

Great idea. By default we can generate the code that only includes the Observable properties. Computed will be skipped.

[pavanpodila]

Lot of this functionality overlaps with what is offered by json_serializable. Perhaps we can take a dependency on it?

[katis]

Marking the mixed class with @JsonSerializable works for me:

@JsonSerializable(nullable: false)
class User extends _User with _$User {
  User(int id) : super(id);

  factory User.fromJson(Map<String, dynamic> json) => _$UserFromJson(json);
  Map<String, dynamic> toJson() => _$UserToJson(this);
}

abstract class _User implements Store {
  _User(this.id);

  final int id;

  @observable
  String firstName = 'Jane';

  @observable
  String lastName = 'Doe';

  @computed
  String get fullName => '$firstName $lastName';

  @action
  void updateNames({String firstName, String lastName}) {
    if (firstName != null) this.firstName = firstName;
    if (lastName != null) this.lastName = lastName;
  }
}

generates the Store mixin and the serialization code for User:

User _$UserFromJson(Map<String, dynamic> json) {
  return User(json['id'] as int)
    ..firstName = json['firstName'] as String
    ..lastName = json['lastName'] as String;
}

Map<String, dynamic> _$UserToJson(User instance) => <String, dynamic>{
      'id': instance.id,
      'firstName': instance.firstName,
      'lastName': instance.lastName
    };

[canewsin]

If suppose id is not a string but a Map we have to parse it manually and also we cannot use jsonkey annotation for custom keys
still @katis thanks for your catch your comment helps me to some extent

[pavanpodila]

Closing this for now. json_serializable is the way to go right now.