json-serializable

Dart package for JSON serialization and deserialization

Mobile Dev Flutter json_serializable fromJson Error: Nested Classes Fix

Resolve 'The method 'fromJson' isn't defined for SubOne/SubTwo' in Flutter json_serializable nested classes. Add factory delegates with explicitToJson for self-referential lists. Full code, build_runner steps, and best practices.

#build-runner
#dart
#flutter
#json-serializable
#serialization

1 answer• 1 view

02/03/2026, 04:42 PM