我最近开始遇到问题。我需要将我的json response解析为模型对象类的list，但我不断收到此错误：
type 'String' is not a subtype of type 'int' of 'index'
在线尝试了几种解决方案，但对我不起作用。我很想知道我在模型类中的变量声明是问题，所以我将它们更改为动态，但仍然对我不起作用。
模型
class MenteeIndex {
dynamic id;
dynamic mentor_id;
dynamic mentee_id;
dynamic status;
dynamic session_count;
dynamic current_job;
dynamic email;
dynamic phone_call;
dynamic video_call;
dynamic face_to_face;
dynamic created_at;
dynamic updated_at;
MenteeIndex(this.id, this.mentor_id, this.mentee_id, this.status, this.session_count, this.current_job,
this.email, this.phone_call, this.video_call, this.face_to_face, this.created_at, this.updated_at);
Map<String, dynamic> toJson() => {
'id': id,
'mentor_id': mentor_id,
'mentee_id': mentee_id,
'status': status,
'session_count': session_count,
'current_job': current_job,
'email':email,
'phone_call': phone_call,
'video_call': video_call,
'face_to_face': face_to_face,
'created_at': created_at,
'updated_at': updated_at,
};
MenteeIndex.fromJson(Map<String, dynamic> json):
id = json['id'],
mentor_id = json['mentor_id'],
mentee_id = json['mentee_id'],
status = json['status'],
session_count = json['session_count'],
current_job = json['current_job'],
email = json['email'],
phone_call = json['phone_call'],
video_call = json['video_call'],
face_to_face = json['face_to_face'],
created_at = json['created_at'],
updated_at = json['updated_at'];
}
主要
Future fetchIndex() async {
SharedPreferences sharedPreferences = await SharedPreferences.getInstance();
var uri = NetworkUtils.host + AuthUtils.endPointIndex;
try {
final response = await http.get(
uri,
headers: {'Accept': 'application/json', 'Content-Type': 'application/json','Authorization': 'Bearer ' + sharedPreferences.get("token"), },
);
var encodeFirst = json.encode(response.body);
final responseJson = json.decode(encodeFirst);
//here is where the error is
for (var u in responseJson["data"]) {
MenteeIndex user = MenteeIndex(
u["id"],
u["mentor_id"],
u["mentee_id"],
u["status"],
u["session_count"],
u["current_job"],
u["email"],
u["phone_call"],
u["video_call"],
u["face_to_face"],
u["created_at"],
u["updated_at"]);
menteeIndexes.add(user);
setState((){
mentorIdList = menteeIndexes.map((MenteeIndex) => MenteeIndex.mentor_id);
indexIds = menteeIndexes.map((MenteeIndex) => MenteeIndex.id);
status = menteeIndexes.map((MenteeIndex) => MenteeIndex.status);
});
}
return responseJson;
} catch (exception) {
print(exception);
}
}
响应/错误
{"current_page":1,"data":[{"id":13,"mentor_id":"5","mentee_id":"184","status":null,"session_count":0,"current_job":null,"email":null,"phone_call":null,"video_call":null,"face_to_face":null,"created_at":"2020-02-20 20:37:50","updated_at":"2020-02-20 20:37:50"},{"id":14,"mentor_id":"8","mentee_id":"184","status":null,"session_count":0,"current_job":null,"email":null,"phone_call":null,"video_call":null,"face_to_face":null,"created_at":"2020-02-21 22:39:31","updated_at":"2020-02-21 22:39:31"},{"id":15,"mentor_id":"10","mentee_id":"184","status":null,"session_count":0,"current_job":null,"email":null,"phone_call":null,"video_call":null,"face_to_face":null,"created_at":"2020-02-23 05:15:23","updated_at":"2020-02-23 05:15:23"},{"id":16,"mentor_id":"191","mentee_id":"184","status":null,"session_count":0,"current_job":null,"email":null,"phone_call":null,"video_call":null,"face_to_face":null,"created_at":"2020-02-23 05:17:34","updated_at":"2020-02-23 05:17:34"},{"id":17,"mentor_id":"141","mentee_id":"184","status":"1",
I/flutter (20995): type 'String' is not a subtype of type 'int' of 'index'
答案 0 :(得分：0)
将响应正文解码为Map
final responseJson = json.decode(response.body);
将Map列表转换为MenteeIndex列表
final menteeIndexes = responseJson["data"].map(
(json) => MenteeIndex.fromJson(json)
).toList();
答案 1 :(得分：0)
查看此模型课程
// To parse this JSON data, do
//
// final yourModel = yourModelFromJson(jsonString);
import 'dart:convert';
YourModel yourModelFromJson(String str) => YourModel.fromJson(json.decode(str));
String yourModelToJson(YourModel data) => json.encode(data.toJson());
class YourModel {
int currentPage;
List<Datum> data;
YourModel({
this.currentPage,
this.data,
});
factory YourModel.fromJson(Map<String, dynamic> json) => YourModel(
currentPage: json["current_page"],
data: List<Datum>.from(json["data"].map((x) => Datum.fromJson(x))),
);
Map<String, dynamic> toJson() => {
"current_page": currentPage,
"data": List<dynamic>.from(data.map((x) => x.toJson())),
};
}
class Datum {
int id;
String mentorId;
String menteeId;
dynamic status;
int sessionCount;
dynamic currentJob;
dynamic email;
dynamic phoneCall;
dynamic videoCall;
dynamic faceToFace;
DateTime createdAt;
DateTime updatedAt;
Datum({
this.id,
this.mentorId,
this.menteeId,
this.status,
this.sessionCount,
this.currentJob,
this.email,
this.phoneCall,
this.videoCall,
this.faceToFace,
this.createdAt,
this.updatedAt,
});
factory Datum.fromJson(Map<String, dynamic> json) => Datum(
id: json["id"],
mentorId: json["mentor_id"],
menteeId: json["mentee_id"],
status: json["status"],
sessionCount: json["session_count"],
currentJob: json["current_job"],
email: json["email"],
phoneCall: json["phone_call"],
videoCall: json["video_call"],
faceToFace: json["face_to_face"],
createdAt: DateTime.parse(json["created_at"]),
updatedAt: DateTime.parse(json["updated_at"]),
);
Map<String, dynamic> toJson() => {
"id": id,
"mentor_id": mentorId,
"mentee_id": menteeId,
"status": status,
"session_count": sessionCount,
"current_job": currentJob,
"email": email,
"phone_call": phoneCall,
"video_call": videoCall,
"face_to_face": faceToFace,
"created_at": createdAt.toIso8601String(),
"updated_at": updatedAt.toIso8601String(),
};
}
只需将您的response.body插入此方法：
final yourModel = yourModelFromJson(response.body);
您只需使用下面的调用即可获取数据列表：
List<Datum> dataList = List();
dataList = yourModel.data;
在这里您可以获得数据列表
您将从中获取Single对象，然后根据您的需要执行任何操作。