Flutter Bloc 8.1 - why encountering "this.state invalid reference error"? - flutter

Question

I'm using the Bloc state mangement Library -
currently the version of the Library is 8.1.1
I've followed some guides and tutorials online , but I encountered an error regarding the reference to "this" in AddItem event functions below:
import 'dart:async';
import 'package:foodapptest/models/basket_model.dart';
import 'package:equatable/equatable.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import '../../models.dart';
import 'package:foodapptest/ResturantMenuItem.dart';
part 'basket_event.dart';
part 'basket_state.dart';
class BasketBloc extends Bloc<BasketEvent,BasketState>
//TO do fix bloc
{
BasketBloc() : super(BasketLoading()) {
on<BasketStart>(_onStartBasket);
on<ItemAdd>(_onAddItem);
}
}
Future<void> _onStartBasket(
BasketStart event,
Emitter<BasketState> emit,
) async {
emit( BasketLoading());
try{
emit(BasketLoaded(basket: Basket(),),);
}catch (e) {
print(e);
}
}
Future<void> _onAddItem(
ItemAdd event,
Emitter<BasketState> emit,
) async {
final state = this.state;
if(state is BasketLoaded) {
try {
emit(BasketLoaded(basket: state.basket.copyWith(items: List.from(state.basket.items)..add(event.item))));
} catch (_) {}
}
}
}
The error 1:
The error 2:
all helps appreciated :)
Thank you!

Answer 1

Problem solved: The functions _onAddItem.. should be inside the class.
import 'dart:async';
import 'package:foodapptest/models/basket_model.dart';
import 'package:equatable/equatable.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import '../../models.dart';
import 'package:foodapptest/ResturantMenuItem.dart';
part 'basket_event.dart';
part 'basket_state.dart';
class BasketBloc extends Bloc<BasketEvent,BasketState>
//TO do fix bloc
{
BasketBloc() : super(BasketLoading()) {
on<BasketStart>(_onStartBasket);
on<ItemAdd>(_onAddItem);
}
Future<void> _onStartBasket(
BasketStart event,
Emitter<BasketState> emit,
) async {
emit( BasketLoading());
try{
emit(BasketLoaded(basket: Basket(),),);
}catch (e) {
print(e);
}
}
Future<void> _onAddItem(
ItemAdd event,
Emitter<BasketState> emit,
) async {
final state = this.state;
if(state is BasketLoaded) {
try {
emit(BasketLoaded(basket: state.basket.copyWith(items: List.from(state.basket.items)..ad
d(event.item))));
} catch (_) {}
}
}
}
}