Use pub.dev/packages/json_factory_generator
with JsonFactory auto gen
```
import 'package:example/generated/json_factory.dart';
import 'package:json_annotation/json_annotation.dart';
part 'base_response.g.dart';
/// Generic API response wrapper with JsonSerializable
@JsonSerializable(genericArgumentFactories: true)
class BaseResponse<T> {
final bool success;
final String message;
@DataConverter()
final T? data;
final int? code;
BaseResponse({
required this.success,
required this.message,
this.data,
this.code,
});
/// Generated fromJson with generic type support
factory BaseResponse.fromJson(
Map<String, dynamic> json,
T Function(Object? json) fromJsonT,
) => _$BaseResponseFromJson(json, fromJsonT);
/// Generated toJson with generic type support
Map<String, dynamic> toJson(Object? Function(T value) toJsonT) =>
_$BaseResponseToJson(this, toJsonT);
@override
String toString() {
return 'BaseResponse(success: $success, message: $message, data: $data, code: $code)';
}
}
class DataConverter<T> implements JsonConverter<T?, Object?> {
const DataConverter();
@override
T? fromJson(Object? json) {
return JsonFactory.fromJson(json);
}
@override
Object? toJson(T? object) {
return object;
}
}
```
Use <https://pub.dev/packages/json_factory_generator>
And run: `dart run build_runner build`
```
import 'package:example/generated/json_factory.dart';
import 'package:json_annotation/json_annotation.dart';
part 'base_response.g.dart';
/// Generic API response wrapper with JsonSerializable
@JsonSerializable(genericArgumentFactories: true)
class BaseResponse<T> {
final bool success;
final String message;
@DataConverter()
final T? data;
final int? code;
BaseResponse({
required this.success,
required this.message,
this.data,
this.code,
});
/// Generated fromJson with generic type support
factory BaseResponse.fromJson(
Map<String, dynamic> json,
T Function(Object? json) fromJsonT,
) => _$BaseResponseFromJson(json, fromJsonT);
/// Generated toJson with generic type support
Map<String, dynamic> toJson(Object? Function(T value) toJsonT) =>
_$BaseResponseToJson(this, toJsonT);
@override
String toString() {
return 'BaseResponse(success: $success, message: $message, data: $data, code: $code)';
}
}
class DataConverter<T> implements JsonConverter<T?, Object?> {
const DataConverter();
@override
T? fromJson(Object? json) {
return JsonFactory.fromJson(json);
}
@override
Object? toJson(T? object) {
return object;
}
}
```
