单用户 api fetch, flutter

Question

我只想 fetch/get 单个 api 数据，我试图打印来自 service 的响应我得到了所有 api 数据但是当我试图通过controller 模型变量不正确，我已经在寻找使用 Service 获取单个 api 和使用 GetX 获取 Controller 架构的答案，但我没有找到任何合适的答案，我希望你能帮助我很重要。谢谢

我使用 http 和 GetX

the problem is here

 var user = <UserModel>{}.obs;
    user.value = _user;

它告诉

UserModel _user A value of type 'UserModel' can't be assigned to a variable of type 'Set'. Try changing the type of the variable, or casting the right-hand type to 'Set

这是代码

Api Service

class ApiService {
  Future<UserModel> fetchApi(id) async {
    var url = 'https://reqres.in/api/users/$id';

    var response = await http.get(Uri.parse(url));

    if(response.statusCode == 200){
      var dataResponse = jsonDecode(response.body)['data'];

    UserModel user = UserModel.fromJson(dataResponse);

    return user;
    } else {
      throw Exception('Failed Get API');
    }
  }
}

Controller

class Controller extends GetxController {
  var user = <UserModel>{}.obs;

  Future fetchApi(id) async {
    try {
      var _user = await ApiService().fetchApi(id);
      user.value = _user;
      print(user);
    } catch (e) {
      print(e);
    }
  }
}

Model

class UserModel {
  int id;
  String email;
  String name;
  String avatar;
  UserModel({
    required this.id,
    required this.email,
    required this.name,
    required this.avatar,
  });

  factory UserModel.fromJson(Map<String, dynamic> json) => UserModel(
        id: json['id'],
        email: json['email'],
        name: json['first_name'] + ' ' + json['last_name'],
        avatar: json['avatar'],
      );
}

Answer 1

主要原因是您将用户定义为 {} 类型并且您需要 UserModel 类型。

你需要改变这个：

var user = <UserModel>{}.obs;
user.value = _user;

为此：

var user = UserModel().obs;
user.value = _user;

单用户 api fetch, flutter

Single user api fetch, flutter

flutter

http

flutter-getx