Flutter 在创建肘部并使用冻结时，无法使用中的Copy With方法

我正在创造一个手肘.但是，在运行build_runner命令后，不会生成copyWith()方法. 我的search_cubit.dart文件:

import 'package:book_ai/domain/book/book.dart';
import 'package:book_ai/domain/book/i_book_repository.dart';
import 'package:book_ai/domain/search/search_failure.dart';
import 'package:book_ai/domain/search/value_objects.dart';
import 'package:dartz/dartz.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:freezed_annotation/freezed_annotation.dart';
import 'package:injectable/injectable.dart';

part 'search_cubit.freezed.dart';
part 'search_state.dart';

@injectable
class SearchCubit extends Cubit<SearchState> {
  final IBookRepository _bookRepository;

  SearchCubit(this._bookRepository) : super(SearchState.initial());

  void updateSearchQuery(String typedQuery) {
    emit(state.copyWith(
      searchQuery: SearchQuery(typedQuery),
      searchFailureOrSuccessOption: none(),
    ));
  }

  Future<void> search() async {
    emit(state.copyWith(isSubmitting: true));

    final possibleFailure =
        await _bookRepository.get(state.searchQuery.getOrCrash());

    emit(possibleFailure.fold(
      (failure) {
        failure.maybeWhen(
            unexpected: () => emit(
                  state.copyWith(
                    isSubmitting: false,
                    searchFailureOrSuccessOption: some(
                      left(
                        const SearchFailure.otherFailure('unknown'),
                      ),
                    ),
                  ),
                ),
            orElse: () => const SearchFailure.serverError());
      },
      (books) => SearchState.searchSuccess(books),
    ));

    // emit(state.copyWith(
    //   isSubmitting: false,
    //   searchFailureOrSuccessOption: optionOf(result),
    // ));
  }
}

我的search_state.dart个文件:

part of 'search_cubit.dart';

@freezed
class SearchState with _$SearchState {
  const factory SearchState({
    required SearchQuery searchQuery,
    required bool isSubmitting,
    required Option<Either<SearchFailure, Unit>> searchFailureOrSuccessOption,
  }) = _SearchState;

  const SearchState._();

  const factory SearchState.initial() = _Initial;
  const factory SearchState.loading() = _Loading;
  const factory SearchState.searchFailure(SearchFailure failure) =
      _SearchFailure;
  const factory SearchState.searchSuccess(List<Book> books) = _SearchSuccess;
}

我try 修改search_state.dart文件以明确定义SearchState.initial()，如下所示:

factory SearchState.initial() => SearchState(
      searchQuery: SearchQuery(''),
      isSubmitting: false,
      searchFailureOrSuccessOption: none());

同时删除其他状态.在这种情况下，copyWith方法起作用.然而，我也希望能够使用其他州.