Flutter Freezed - объект имеет по два каждого поля

Question

Все мои объекты в приложении, использующие @freezed , создают по 2 каждого поля.

Я на freezed: ^0.12.7

Когда я копирую и вставляю пример из документации версии 0.12.7:

      import 'package:freezed_annotation/freezed_annotation.dart';

part 'x.freezed.dart';

@freezed
abstract class Person implements _$Person {
  // uses implements instead of with
  const Person._(); // Added constructor
  const factory Person(String name, {int age}) = _Person;

  void method() {
    print('hello world');
  }
}

Удвоение происходит:

РЕДАКТИРОВАТЬ: Я даже обновил свое приложение до flutter 2 и Freezed 0.14.1 + 2 и попытался создать объект с методами путем копирования и вставки из официальных документов:

      @freezed
class Person with _$Person {
  const Person._(); // Added constructor
  const factory Person(String name, {int? age}) = _Person;

  void method() {
    print('hello world');
  }
}

И в нем даже нет метода method()...: D Мне интересно, есть ли ошибка в обеих версиях Freezed, или я нахожу странные крайние случаи в обеих версиях. В любом случае меня это очень тошнит, поскольку я копирую и вставляю официальные документы в нескольких версиях.

Это сгенерированный код из замороженного 0.14.1+2:

      // GENERATED CODE - DO NOT MODIFY BY HAND
// ignore_for_file: unused_element, deprecated_member_use, deprecated_member_use_from_same_package, use_function_type_syntax_for_parameters, unnecessary_const, avoid_init_to_null, invalid_override_different_default_values_named, prefer_expression_function_bodies, annotate_overrides

part of 'person.dart';

// **************************************************************************
// FreezedGenerator
// **************************************************************************

T _$identity<T>(T value) => value;

final _privateConstructorUsedError = UnsupportedError(
    'It seems like you constructed your class using `MyClass._()`. This constructor is only meant to be used by freezed and you are not supposed to need it nor use it.\nPlease check the documentation here for more informations: https://github.com/rrousselGit/freezed#custom-getters-and-methods');

/// @nodoc
class _$PersonTearOff {
  const _$PersonTearOff();

  _Person call(String name, {int? age}) {
    return _Person(
      name,
      age: age,
    );
  }
}

/// @nodoc
const $Person = _$PersonTearOff();

/// @nodoc
mixin _$Person {
  String get name => throw _privateConstructorUsedError;
  int? get age => throw _privateConstructorUsedError;

  @JsonKey(ignore: true)
  $PersonCopyWith<Person> get copyWith => throw _privateConstructorUsedError;
}

/// @nodoc
abstract class $PersonCopyWith<$Res> {
  factory $PersonCopyWith(Person value, $Res Function(Person) then) =
      _$PersonCopyWithImpl<$Res>;
  $Res call({String name, int? age});
}

/// @nodoc
class _$PersonCopyWithImpl<$Res> implements $PersonCopyWith<$Res> {
  _$PersonCopyWithImpl(this._value, this._then);

  final Person _value;
  // ignore: unused_field
  final $Res Function(Person) _then;

  @override
  $Res call({
    Object? name = freezed,
    Object? age = freezed,
  }) {
    return _then(_value.copyWith(
      name: name == freezed
          ? _value.name
          : name // ignore: cast_nullable_to_non_nullable
              as String,
      age: age == freezed
          ? _value.age
          : age // ignore: cast_nullable_to_non_nullable
              as int?,
    ));
  }
}

/// @nodoc
abstract class _$PersonCopyWith<$Res> implements $PersonCopyWith<$Res> {
  factory _$PersonCopyWith(_Person value, $Res Function(_Person) then) =
      __$PersonCopyWithImpl<$Res>;
  @override
  $Res call({String name, int? age});
}

/// @nodoc
class __$PersonCopyWithImpl<$Res> extends _$PersonCopyWithImpl<$Res>
    implements _$PersonCopyWith<$Res> {
  __$PersonCopyWithImpl(_Person _value, $Res Function(_Person) _then)
      : super(_value, (v) => _then(v as _Person));

  @override
  _Person get _value => super._value as _Person;

  @override
  $Res call({
    Object? name = freezed,
    Object? age = freezed,
  }) {
    return _then(_Person(
      name == freezed
          ? _value.name
          : name // ignore: cast_nullable_to_non_nullable
              as String,
      age: age == freezed
          ? _value.age
          : age // ignore: cast_nullable_to_non_nullable
              as int?,
    ));
  }
}

/// @nodoc
class _$_Person extends _Person {
  const _$_Person(this.name, {this.age}) : super._();

  @override
  final String name;
  @override
  final int? age;

  @override
  String toString() {
    return 'Person(name: $name, age: $age)';
  }

  @override
  bool operator ==(dynamic other) {
    return identical(this, other) ||
        (other is _Person &&
            (identical(other.name, name) ||
                const DeepCollectionEquality().equals(other.name, name)) &&
            (identical(other.age, age) ||
                const DeepCollectionEquality().equals(other.age, age)));
  }

  @override
  int get hashCode =>
      runtimeType.hashCode ^
      const DeepCollectionEquality().hash(name) ^
      const DeepCollectionEquality().hash(age);

  @JsonKey(ignore: true)
  @override
  _$PersonCopyWith<_Person> get copyWith =>
      __$PersonCopyWithImpl<_Person>(this, _$identity);
}

abstract class _Person extends Person {
  const factory _Person(String name, {int? age}) = _$_Person;
  const _Person._() : super._();

  @override
  String get name => throw _privateConstructorUsedError;
  @override
  int? get age => throw _privateConstructorUsedError;
  @override
  @JsonKey(ignore: true)
  _$PersonCopyWith<_Person> get copyWith => throw _privateConstructorUsedError;
}

Answer 1

Я получаю хорошее поколение Personобъект из вашего кода. Может быть какая-то ошибка, связанная с вашим partутверждение. При создании нового класса используйте @freeze с участием part 'name.freezed.dart', так что в этом случае это должно быть:

      import 'package:freezed_annotation/freezed_annotation.dart';

part 'person.freezed.dart';

@freezed
abstract class Person implements _$Person {
  // uses implements instead of with
  const Person._(); // Added constructor
  const factory Person(String name, {int age}) = _Person;

  void method() {
    print('hello world');
  }
}

Вот моя генерация кода после запуска flutter pub run build_runner build команда:

      // GENERATED CODE - DO NOT MODIFY BY HAND
// ignore_for_file: deprecated_member_use, deprecated_member_use_from_same_package, use_function_type_syntax_for_parameters, unnecessary_const, avoid_init_to_null, invalid_override_different_default_values_named, prefer_expression_function_bodies

part of 'person.dart';

// **************************************************************************
// FreezedGenerator
// **************************************************************************

T _$identity<T>(T value) => value;

/// @nodoc
class _$PersonTearOff {
  const _$PersonTearOff();

// ignore: unused_element
  _Person call(String name, {int age}) {
    return _Person(
      name,
      age: age,
    );
  }
}

/// @nodoc
// ignore: unused_element
const $Person = _$PersonTearOff();

/// @nodoc
mixin _$Person {
  String get name;
  int get age;

  @JsonKey(ignore: true)
  $PersonCopyWith<Person> get copyWith;
}

/// @nodoc
abstract class $PersonCopyWith<$Res> {
  factory $PersonCopyWith(Person value, $Res Function(Person) then) =
      _$PersonCopyWithImpl<$Res>;
  $Res call({String name, int age});
}

/// @nodoc
class _$PersonCopyWithImpl<$Res> implements $PersonCopyWith<$Res> {
  _$PersonCopyWithImpl(this._value, this._then);

  final Person _value;
  // ignore: unused_field
  final $Res Function(Person) _then;

  @override
  $Res call({
    Object name = freezed,
    Object age = freezed,
  }) {
    return _then(_value.copyWith(
      name: name == freezed ? _value.name : name as String,
      age: age == freezed ? _value.age : age as int,
    ));
  }
}

/// @nodoc
abstract class _$PersonCopyWith<$Res> implements $PersonCopyWith<$Res> {
  factory _$PersonCopyWith(_Person value, $Res Function(_Person) then) =
      __$PersonCopyWithImpl<$Res>;
  @override
  $Res call({String name, int age});
}

/// @nodoc
class __$PersonCopyWithImpl<$Res> extends _$PersonCopyWithImpl<$Res>
    implements _$PersonCopyWith<$Res> {
  __$PersonCopyWithImpl(_Person _value, $Res Function(_Person) _then)
      : super(_value, (v) => _then(v as _Person));

  @override
  _Person get _value => super._value as _Person;

  @override
  $Res call({
    Object name = freezed,
    Object age = freezed,
  }) {
    return _then(_Person(
      name == freezed ? _value.name : name as String,
      age: age == freezed ? _value.age : age as int,
    ));
  }
}

/// @nodoc
class _$_Person extends _Person {
  const _$_Person(this.name, {this.age})
      : assert(name != null),
        super._();

  @override
  final String name;
  @override
  final int age;

  @override
  String toString() {
    return 'Person(name: $name, age: $age)';
  }

  @override
  bool operator ==(dynamic other) {
    return identical(this, other) ||
        (other is _Person &&
            (identical(other.name, name) ||
                const DeepCollectionEquality().equals(other.name, name)) &&
            (identical(other.age, age) ||
                const DeepCollectionEquality().equals(other.age, age)));
  }

  @override
  int get hashCode =>
      runtimeType.hashCode ^
      const DeepCollectionEquality().hash(name) ^
      const DeepCollectionEquality().hash(age);

  @JsonKey(ignore: true)
  @override
  _$PersonCopyWith<_Person> get copyWith =>
      __$PersonCopyWithImpl<_Person>(this, _$identity);
}

abstract class _Person extends Person {
  const _Person._() : super._();
  const factory _Person(String name, {int age}) = _$_Person;

  @override
  String get name;
  @override
  int get age;
  @override
  @JsonKey(ignore: true)
  _$PersonCopyWith<_Person> get copyWith;
}