Flutter - 使用 Freezed 实现接口(interface)时出错

Question

我正在尝试使用 Freezed 对接口(interface)进行编程.我希望能够在我的整个应用程序中指定类型 IUserRegistrationEntity;

我的界面:

abstract class IUserRegistrationEntity {
  String nickName;
  String email;
  String confirmEmail;
  String password;
  String confirmPassword;
}

我的卡住类:

import 'package:freezed_annotation/freezed_annotation.dart';
import 'package:vepo/domain/user_registration/i_user_registration_entity.dart';

part 'user_registration_entity.freezed.dart';

@freezed
abstract class UserRegistrationEntity with _$UserRegistrationEntity {
  @Implements(IUserRegistrationEntity)
  factory UserRegistrationEntity(
      {String nickName,
      String email,
      String confirmEmail,
      String password,
      String confirmPassword}) = _UserRegistrationEntity;
}

运行应用程序时出现错误:

lib/domain/user_registration/user_registration_entity.freezed.dart:165:7: Error: The non-abstract class '_$_UserRegistrationEntity' is missing implementations for these members:
 - IUserRegistrationEntity.confirmEmail
 - IUserRegistrationEntity.confirmPassword
 - IUserRegistrationEntity.email
 - IUserRegistrationEntity.nickName
 - IUserRegistrationEntity.password
Try to either
 - provide an implementation,
 - inherit an implementation from a superclass or mixin,
 - mark the class as abstract, or
 - provide a 'noSuchMethod' implementation.

class _$_UserRegistrationEntity implements _UserRegistrationEntity {
      ^^^^^^^^^^^^^^^^^^^^^^^^^
lib/domain/user_registration/i_user_registration_entity.dart:4:10: Context: 'IUserRegistrationEntity.confirmEmail' is defined here.
  String confirmEmail;

         ^^^^^^^^^^^^
lib/domain/user_registration/i_user_registration_entity.dart:6:10: Context: 'IUserRegistrationEntity.confirmPassword' is defined here.
  String confirmPassword;
         ^^^^^^^^^^^^^^^
lib/domain/user_registration/i_user_registration_entity.dart:3:10: Context: 'IUserRegistrationEntity.email' is defined here.
  String email;
         ^^^^^
lib/domain/user_registration/i_user_registration_entity.dart:2:10: Context: 'IUserRegistrationEntity.nickName' is defined here.
  String nickName;
         ^^^^^^^^

lib/domain/user_registration/i_user_registration_entity.dart:5:10: Context: 'IUserRegistrationEntity.password' is defined here.
  String password;

         ^^^^^^^^

我做错了什么？

编辑:包文档中的这段引述是否意味着不可能？

Note 2: You cannot use @With/@Implements with freezed classes. Freezedclasses can neither be extended nor implemented.

很想知道人们是否认为这是一个缺点。

Answer 1

我测试了您的代码并从生成的文件中发现了问题。问题是，freezed 不会覆盖已实现的抽象类中的 setter。因此，对于您的 IUserRegistrationEntity，将参数设置为 getter。像这样:

abstract class IUserRegistrationEntity {
  String get nickName;
  String get email;
  String get confirmEmail;
  String get password;
  String get confirmPassword;
}