如何解决如何将dio的响应数据分配给飞镖对象?
我正在尝试使用dio来获取API的用户。但是,当我尝试将请求转换为dart用户列表时,它不起作用。
我的编码器和解码器类:,该类是从在线json解码器站点中生成的。
List<User> userListFromJson(String str) =>
List<User>.from(json.decode(str).map((x) => User.fromJson(x)));
User userFromJson(String str) => User.fromJson(json.decode(str));
String userToJson(User data) => json.encode(data.toJson());
class User {
User({
this.url,this.id,this.image,this.username,this.nid,this.email,this.password,this.firstName,this.lastName,this.isActive,this.isStaff,this.isAuthority,this.isSpecialist,this.isGeneralUser,});
String url;
int id;
String image;
String username;
String nid;
String email;
String password;
dynamic firstName;
dynamic lastName;
bool isActive;
bool isStaff;
bool isAuthority;
bool isSpecialist;
bool isGeneralUser;
factory User.fromJson(Map<String,dynamic> json) => User(
url: json["url"] == null ? null : json["url"],id: json["id"] == null ? null : json["id"],image: json["image"] == null ? null : json["image"],username: json["username"] == null ? null : json["username"],nid: json["nid"] == null ? null : json["nid"],email: json["email"] == null ? null : json["email"],password: json["password"] == null ? null : json["password"],firstName: json["first_name"],lastName: json["last_name"],isActive: json["is_active"],isStaff: json["is_staff"],isAuthority: json["is_authority"],isSpecialist: json["is_specialist"],isGeneralUser: json["is_general_user"],);
Map<String,dynamic> toJson() => {
"url": url == null ? null : url,"id": id == null ? null : id,"image": image == null ? null : image,"username": username == null ? null : username,"nid": nid == null ? null : nid,"email": email == null ? null : email,"first_name": firstName,"last_name": lastName,"is_active": isActive == false ? false : isActive,"is_staff": isStaff == false ? false : isStaff,"is_authority": isAuthority == false ? false : isAuthority,"is_specialist": isSpecialist == false ? false : isSpecialist,"is_general_user": isGeneralUser == false ? false : isGeneralUser,};
}
我的Api请求类,它返回dio的响应。
Future<dio.Response> getAllUsers() async {
return await _dio.get(
'$baseUrl/user/list',options: dio.Options(
contentType: dio.Headers.jsonContentType,headers: requestHeader,),);
}
提供商的代码,响应将在其中转换和存储以供应用使用。
Future<bool> fetchUsersList() async {
var resp = await ApIService().getAllUsers();
if (resp.statusCode == 200) {
List rawJson = resp.data;
var users = rawJson.map((e) => userFromJson(e)).toList();
_setUsersList(users);
return true;
} else {
_setMessage(jsonDecode(resp.data)['detail']);
_setStatusCode(resp.statusCode);
return false;
}
}
代码运行时显示如下错误:
[ERROR:flutter / lib / ui / ui_dart_state.cc(157)]未处理的异常:类型'_InternalLinkedHashMap
'不是类型'String'的子类型
解决方法
class User {
String url;
int id;
String image;
String username;
String nid;
String email;
String password;
dynamic firstName;
dynamic lastName;
bool isActive;
bool isStaff;
bool isAuthority;
bool isSpecialist;
bool isGeneralUser;
User({
this.url,this.id,this.image,this.username,this.nid,this.email,this.password,this.firstName,this.lastName,this.isActive,this.isStaff,this.isAuthority,this.isSpecialist,this.isGeneralUser,});
Map<String,dynamic> toMap() {
return {
'url': url,'id': id,'image': image,'username': username,'nid': nid,'email': email,'password': password,'firstName': firstName,'lastName': lastName,'isActive': isActive,'isStaff': isStaff,'isAuthority': isAuthority,'isSpecialist': isSpecialist,'isGeneralUser': isGeneralUser,};
}
factory User.fromMap(Map<String,dynamic> map) {
if (map == null) return null;
return User(
url: map['url'],id: map['id'],image: map['image'],username: map['username'],nid: map['nid'],email: map['email'],password: map['password'],firstName: map['firstName'],lastName: map['lastName'],isActive: map['isActive'],isStaff: map['isStaff'],isAuthority: map['isAuthority'],isSpecialist: map['isSpecialist'],isGeneralUser: map['isGeneralUser'],);
}
String toJson() => json.encode(toMap());
factory User.fromJson(String source) => User.fromMap(json.decode(source));
}
Future<bool> fetchUsersList() async {
List<User> _setUsersList = [];
var resp = await ApIService().getAllUsers();
if (resp.statusCode == 200) {
resp.data.forEach((data) {
User user = User.fromMap(data);
_setUsersList.add(user);
});
return true;
} else {
_setStatusCode(resp.statusCode);
return false;
}
}
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