未在 Flutter(Dart) 中创建 .g.dart 类

Question

我在

flutter

中使用了json_serializable库并创建了一个类并创建了库的

Annotation

，即类中的json_serialized，如下例所示：

import 'package:json_annotation/json_annotation.dart';
part 'AppData.g.dart';

@JsonSerializable()
class AppData {
  String? Username;
  String? Password;
  String? Avatar;
  String? Name;
  String? Family;
  String? FullName;
  String? UserType;
  String? Email;
  String? Mobile;

  AppData({this.Username, this.Password, this.Email,
    this.Family, this.Name, this.FullName, this.UserType, this.Mobile, this.Avatar})

  factory AppData.fromJson(Map<String, dynamic> json) =>
      _$AppDataFromJson(json);

  Map<String, dynamic> toJson() => _$AppDataToJson(this);
}

问题是，当我在

terminal

中输入 dart run build_runner build 时，它会给出错误并且不会创建

AppData.g.dart

类。

终端中给出的错误图像：

Answer 1

您缺少一个分号来关闭 AppData 构造函数：

AppData({this.Username, this.Password, this.Email,this.Family, this.Name, this.FullName, this.UserType, this.Mobile, this.Avatar});