'_InternalLinkedHashMap<String, dynamic>'不是 'Iterable<dynamic>' Flutter 类型的子类型

Question

我试图从api获取数据并添加到我的列表中，但我得到这样的错误"' _internallinkedhashmap " String, dynamic "'不是类型'Iterable'"的子类型。如何解决这个错误?

以下是我的json响应:

{
"status": true,
"result": "found",
"data": [
{
"ref_id": "37",
"postId": "106764933065187174744",
"azakhana_name": "Sakina hall",
"city_name": "Mahuva",
"description": "no detail",
"end_date": "14-01-2023",
"image_path": "Posts_Images/POST-IMG1423956606.jpg",
"name_of_schollar": "Molana sahab",
"postDateTime": "05-01-2023 11:49 AM",
"program_list": "Majlis",
"special_notes": "no notes",
"start_date": "07-01-2023",
"time": "10:00 AM",
"user_name": "Taki Rajani",
"status": "Ongoing"
},
{
"ref_id": "39",
"postId": "106764933065187174744",
"azakhana_name": "aaa",
"city_name": "sss",
"description": "ssss",
"end_date": "05-01-2023",
"image_path": "Posts_Images/POST-IMG869535151.jpg",
"name_of_schollar": "ssss",
"postDateTime": "05-01-2023 12:07 PM",
"program_list": "Majlis",
"special_notes": "ss",
"start_date": "05-01-2023",
"time": "12:07 PM",
"user_name": "Taki Rajani",
"status": "Past"
},

],
"totalPosts": "5",
"totalPages": 2,
"perPageLimit": 3,
"currentPage": 1,
"hasNextPage": 1
}

获取api细节并添加到数组的代码:

List<UserPostModel> myList = [];

Future<List<UserPostModel>> getUserPost() async {
var url =
"https:getUserPost.php?page=$currentPage";
var response = await http.get(Uri.parse(url));
var data = jsonDecode(response.body.toString());

if (response.statusCode == 200) {
for (var i in data){
myList.add(UserPostModel.fromJson(i));
}

print(myList);
return myList;
} else {
print("failed");
return myList;
}
}

下面是我的模型类，它基本上是由android studio中的一个名为JsonToDart的包创建的。

class UserPostModel {
UserPostModel({
bool? status, 
String? result, 
List<Data>? data, 
String? totalPosts, 
num? totalPages, 
num? perPageLimit, 
num? currentPage, 
num? hasNextPage,}){
_status = status;
_result = result;
_data = data;
_totalPosts = totalPosts;
_totalPages = totalPages;
_perPageLimit = perPageLimit;
_currentPage = currentPage;
_hasNextPage = hasNextPage;
}
UserPostModel.fromJson(dynamic json) {
_status = json['status'];
_result = json['result'];
if (json['data'] != null) {
_data = [];
json['data'].forEach((v) {
_data?.add(Data.fromJson(v));
});
}
_totalPosts = json['totalPosts'];
_totalPages = json['totalPages'];
_perPageLimit = json['perPageLimit'];
_currentPage = json['currentPage'];
_hasNextPage = json['hasNextPage'];
}
bool? _status;
String? _result;
List<Data>? _data;
String? _totalPosts;
num? _totalPages;
num? _perPageLimit;
num? _currentPage;
num? _hasNextPage;
UserPostModel copyWith({  bool? status,
String? result,
List<Data>? data,
String? totalPosts,
num? totalPages,
num? perPageLimit,
num? currentPage,
num? hasNextPage,
}) => UserPostModel(  status: status ?? _status,
result: result ?? _result,
data: data ?? _data,
totalPosts: totalPosts ?? _totalPosts,
totalPages: totalPages ?? _totalPages,
perPageLimit: perPageLimit ?? _perPageLimit,
currentPage: currentPage ?? _currentPage,
hasNextPage: hasNextPage ?? _hasNextPage,
);
bool? get status => _status;
String? get result => _result;
List<Data>? get data => _data;
String? get totalPosts => _totalPosts;
num? get totalPages => _totalPages;
num? get perPageLimit => _perPageLimit;
num? get currentPage => _currentPage;
num? get hasNextPage => _hasNextPage;
Map<String, dynamic> toJson() {
final map = <String, dynamic>{};
map['status'] = _status;
map['result'] = _result;
if (_data != null) {
map['data'] = _data?.map((v) => v.toJson()).toList();
}
map['totalPosts'] = _totalPosts;
map['totalPages'] = _totalPages;
map['perPageLimit'] = _perPageLimit;
map['currentPage'] = _currentPage;
map['hasNextPage'] = _hasNextPage;
return map;
}
}
/// ref_id : "37"
/// postId : "106764933065187174744"
/// azakhana_name : "Sakina hall"
/// city_name : "Mahuva"
/// description : "no detail"
/// end_date : "14-01-2023"
/// image_path : "Posts_Images/POST-IMG1423956606.jpg"
/// name_of_schollar : "Molana sahab"
/// postDateTime : "05-01-2023 11:49 AM"
/// program_list : "Majlis"
/// special_notes : "no notes"
/// start_date : "07-01-2023"
/// time : "10:00 AM"
/// user_name : "Taki Rajani"
/// status : "Ongoing"
class Data {
Data({
String? refId, 
String? postId, 
String? azakhanaName, 
String? cityName, 
String? description, 
String? endDate, 
String? imagePath, 
String? nameOfSchollar, 
String? postDateTime, 
String? programList, 
String? specialNotes, 
String? startDate, 
String? time, 
String? userName, 
String? status,}){
_refId = refId;
_postId = postId;
_azakhanaName = azakhanaName;
_cityName = cityName;
_description = description;
_endDate = endDate;
_imagePath = imagePath;
_nameOfSchollar = nameOfSchollar;
_postDateTime = postDateTime;
_programList = programList;
_specialNotes = specialNotes;
_startDate = startDate;
_time = time;
_userName = userName;
_status = status;
}
Data.fromJson(dynamic json) {
_refId = json['ref_id'];
_postId = json['postId'];
_azakhanaName = json['azakhana_name'];
_cityName = json['city_name'];
_description = json['description'];
_endDate = json['end_date'];
_imagePath = json['image_path'];
_nameOfSchollar = json['name_of_schollar'];
_postDateTime = json['postDateTime'];
_programList = json['program_list'];
_specialNotes = json['special_notes'];
_startDate = json['start_date'];
_time = json['time'];
_userName = json['user_name'];
_status = json['status'];
}
String? _refId;
String? _postId;
String? _azakhanaName;
String? _cityName;
String? _description;
String? _endDate;
String? _imagePath;
String? _nameOfSchollar;
String? _postDateTime;
String? _programList;
String? _specialNotes;
String? _startDate;
String? _time;
String? _userName;
String? _status;
Data copyWith({  String? refId,
String? postId,
String? azakhanaName,
String? cityName,
String? description,
String? endDate,
String? imagePath,
String? nameOfSchollar,
String? postDateTime,
String? programList,
String? specialNotes,
String? startDate,
String? time,
String? userName,
String? status,
}) => Data(  refId: refId ?? _refId,
postId: postId ?? _postId,
azakhanaName: azakhanaName ?? _azakhanaName,
cityName: cityName ?? _cityName,
description: description ?? _description,
endDate: endDate ?? _endDate,
imagePath: imagePath ?? _imagePath,
nameOfSchollar: nameOfSchollar ?? _nameOfSchollar,
postDateTime: postDateTime ?? _postDateTime,
programList: programList ?? _programList,
specialNotes: specialNotes ?? _specialNotes,
startDate: startDate ?? _startDate,
time: time ?? _time,
userName: userName ?? _userName,
status: status ?? _status,
);
String? get refId => _refId;
String? get postId => _postId;
String? get azakhanaName => _azakhanaName;
String? get cityName => _cityName;
String? get description => _description;
String? get endDate => _endDate;
String? get imagePath => _imagePath;
String? get nameOfSchollar => _nameOfSchollar;
String? get postDateTime => _postDateTime;
String? get programList => _programList;
String? get specialNotes => _specialNotes;
String? get startDate => _startDate;
String? get time => _time;
String? get userName => _userName;
String? get status => _status;
Map<String, dynamic> toJson() {
final map = <String, dynamic>{};
map['ref_id'] = _refId;
map['postId'] = _postId;
map['azakhana_name'] = _azakhanaName;
map['city_name'] = _cityName;
map['description'] = _description;
map['end_date'] = _endDate;
map['image_path'] = _imagePath;
map['name_of_schollar'] = _nameOfSchollar;
map['postDateTime'] = _postDateTime;
map['program_list'] = _programList;
map['special_notes'] = _specialNotes;
map['start_date'] = _startDate;
map['time'] = _time;
map['user_name'] = _userName;
map['status'] = _status;
return map;
}
}

我尝试以下解决方案，但它给我错误，如:'字符串'不是类型'bool的子类型?'

Future<List<UserPostModel>> getUserPost() async {
var url =
"APIgetUserPost.php?page=$currentPage";
var response = await http.get(Uri.parse(url));
Map<String,dynamic> data = jsonDecode(response.body);
List<dynamic> data1 = data["data"];
//This print give me perfect answer
print(data1[0]["azakhana_name"]);
if (response.statusCode == 200) {
for (var i in data1){
myList.add(UserPostModel.fromJson(i));
}
print(myList);
return myList;
} else {
print("failed");
return myList;
}
}

Answer 1

这可能对你有帮助

Future<List> getPosts(int categoryId) async {
List<PostModel> templist = [];
ApiBaseHelper _helper = ApiBaseHelper();
Map<String, dynamic> data = <String, dynamic>{};
data['username'] = user!.username;
data['category_id'] = categoryId;
data['ofset'] = offset;
final response = await _helper.post(url_getAllPublicPosts, data);
if (!response['error']) {
List<dynamic> record = List.from(response['records']);
for (var i = 0; i < record.length; i++) {
try {
if (record[i]['shared_post'].toString().isEmpty) {
templist.add(PostModel.fromJson(record[i]));
} else {
templist.add(PostModel.fromJson(record[i]['shared_post']));
templist[i].addShareDetails(record[i]);
}
} catch (Exception) {
print(Exception.toString());
}
}