Severe error during build with @reflector and @JsonKey on the same class.

[binzheng]

When using both @reflector and @JsonKey annotations on the same class, the flutter pub run build_runner build command produces a severe error.

Here is the code snippet causing the issue:

part 'sample_item.g.dart';

@JsonSerializable()
@reflector
class SampleItem {
  final int id;
  @JsonKey(includeFromJson: true, toJson: _decodeString)
  String? descriptionActivity;
  SampleItem(this.id, {this.descriptionActivity});
  static String? _decodeString(String? image) => image;

  factory SampleItem.fromJson(Map<String, dynamic> json) => _$SampleItemFromJson(json);
  Map<String, dynamic> toJson() => _$SampleItemToJson(this);
}

The error messages are:

[SEVERE] reflectable on lib/main.dart (cached): Cannot handle private identifier _decodeString [SEVERE] reflectable on lib/main.dart (cached): Could not format because the source could not be parsed: ... Expected an identifier.

I believe this issue lies within the reflector package's handling of @JsonKey annotations. More specifically, it appears to struggle with parsing the toJson attribute when it refers to a private method, like _decodeString in my example.

Any guidance or fixes would be greatly appreciated.

[eernstg]

Reflectable cannot generate code that accesses private members, so we can't reflect on those members in any way.

You should be able to use something like the capability instanceInvokeCapability('^[^_]') to avoid attempting to include support for any members with a private name. The string '^[^_]' is a regular expression, and it just says that the member name doesn't start with an underscore.

Check out https://github.com/google/reflectable.dart/blob/master/test_reflectable/test/member_capability_test.dart for an example where members are included in / excluded from reflective support by means of this mechanism.