Flutter：“type 'Teams' is not a subtype of type 'int' in type cast”错误来自请求

Question

我在 Flutter 中发送请求有问题，我有这个模型：

import 'dart:convert';
List<Teams> teamsFromJson(String str) =>
    List<Teams>.from(json.decode(str).map((x) => Teams.fromJson(x)));
String teamsToJson(List<Teams> data) =>
    json.encode(List<dynamic>.from(data.map((x) => x.toJson())));
class Teams {
  Teams({
    this.club,
    this.price,
    this.surename,
    this.id,
    this.league,
  });
  final club;
  final price;
  final surename;
  final id;
  final league;
  factory Teams.fromJson(Map<String, dynamic> json) => Teams(
        club: json["club"],
        price: json["price"],
        surename: json["surename"],
        id: json["id"],
        league: json["league"],
      );
  Map<String, dynamic> toJson() => {
        "club": club,
        "price": price,
        "surename": surename,
        "id": id,
        "league": league,
      };
}

我添加初始值并在提供程序中更新它们：

List<Teams> get teams => _teams;
List<Teams> _teams = [
    Teams(club: "", price: 0, surename: "", id: "", league: ""),
    Teams(club: "", price: 0, surename: "", id: "", league: ""),]
addToTeam(data, index) {
teams[index]=Team(club: data.club,
            price: data.price,
            surename: data.surname,
            id: data.id,
            league: data.leagueName);
}

它工作正常，现在我想作为请求发送列表团队，我添加按钮并创建这样的方法：

onPressed: () {
       ApiService().saveTeam(teamsProvider.teams);
      }

在 ApiService 上我有这个请求：

class ApiService {
    var url = 'http://10.0.2.2:8000/api/v1';

  Future saveTeam(data) async {
    var newurl = Uri.parse(url + '/send_test');
    try {
      var response = await http.post(newurl, body: data);
      var result = jsonDecode(response.body);
      print(result);
    } catch (e) {
      print('error : $e');
    }
  }
}

api 请求就是 return laravel 中的请求：

public function send_test(Request $request)
    {
        return $request;
    }

结果我得到这个错误信息：type 'Teams' is not a subtype of type 'int' in type cast 我该如何解决这个问题？

Answer 1

我自己解决了，我将Team列表转换成String并用json解码：

class ApiService {
  var url = 'http://10.0.2.2:8000/api/v1';

  Future saveTeam(List<Teams> data) async {
    var list = [];
    data.map((e) {
      list.add({
        "club": e.club,
        "price": e.price,
        "surename": e.surename,
        "id": e.id,
        "league": e.league
      });
    }).toList();
    try {
      var newurl = Uri.parse(url + '/send_test');
      var response = await http.post(newurl, body: jsonEncode(list));
      var result = jsonDecode(response.body);
      print(result);
    } catch (e) {
      print('error : $e');
    }
  }
}

然后在 api 在 laaravel/lumen 收到 json 并再次解码 :

public function send_test(Request $request)
    {
        $result = json_decode($request->getContent(), true);
        return $result;
    }

Flutter：“type 'Teams' is not a subtype of type 'int' in type cast”错误来自请求

Flutter : " type 'Teams' is not a subtype of type 'int' in type cast " error comes from request

flutter

request

provider