How to take a certain data index of Future<List> item in Flutter?-CodePudding

I Have a problem to take the newest data index

class User {
  final String idUser,
  name,
  phone;

  User(
    {this.idUser,
    this.name,
    this.phone});

  factory User.fromJson(Map<String, dynamic> json) {
    return User(
    idUser: json['_id'],
    name: json['name'],
    phone: json['phone']);
  }
}

List<User> userFromJson(jsonData) {
  List<User> result =
    List<User>.from(jsonData.map((item) => User.fromJson(item)));

  return result;
}

// index
Future<List<User>> fetchUser() async {
  String route = AppConfig.API_ENDPOINT   "userdata";
  final response = await http.get(route);
  if (response.statusCode == 200) {
    var jsonResp = json.decode(response.body);

    return userFromJson(jsonResp);
  } else {
    throw Exception('Failed load $route, status : ${response.statusCode}');
  }
}

and the calling method just like this

user = fetchUser();

I expect it was how to take the first index to get the newest data, but I don't know ho the code will be. Also if there are another soltion to get that newest data, please let me know, thank you very much

CodePudding user response：

You can use array index number to get the first object in array.

 if (response.statusCode == 200) {
    var jsonResp = json.decode(response.body);

    return userFromJson(jsonResp[0]);
  } else {
    throw Exception('Failed load $route, status : ${response.statusCode}');
  }

Other method is by modifying the Query using LIMIT 1

CodePudding user response：

Use index to get the specific value from a list

userFromJson(jsonResp[0]); /// For first record