error when trying to decode json and casting it - json

Question

I am trying to decode complex json data and always resulting in error.
Below are my json data:
{
"status_code": 200,
"message": "Successfully get data user",
"data": {
"sec_user": {
"clientIp": "1.4.2.54",
"officeid": "N/A",
},
"username": "uname",
"name1": "",
"menus": [
{
"appl_id": "MTC",
"menu_caption": "Master",
"menu_path": "/master",
"submenus": [
{
"menu_caption": "Machine List",
"note1": "master",
"sub_menu_id": "1",
"route_path": "/machine_list"
},
{
"menu_caption": "Sparepart Category",
"note1": "master",
"sub_menu_id": "1",
"route_path": "/sparepart_category"
}
]
},
{
"appl_id": "MTC",
"menu_caption": "Master",
"menu_path": "/master",
"submenus": [
{
"menu_caption": "Machine List",
"note1": "master",
"sub_menu_id": "1",
"route_path": "/machine_list"
}
]
},
]
}
}
and I already create a model class using json to dart (and already retouch it a bit) and use json annotation and build runner. Then I get an error everytime I tried to decode the body of this json
if (jsonResponse.statusCode == 200) {
final jsonItems =
json.decode(jsonResponse.body).cast<Map<String, dynamic>>();
List<Profile> profile = jsonItems.map<Profile>((json) {
return MyMenu.fromJson(json);
}).toList();
return profile;
}
I always get this error message (attached on the image bellow):
What when wrong with my code ?

Answer 1

End up answering my question, I did this:
json.decode(jsonResponse.body)['data']['menus'].cast<Map<String, dynamic>>();
Don't know if there is any other perfect method to do this.

Answer 2

Your json had some syntax error as well.Please try this it if helps
import 'dart:convert';
void main() {
var jsonData= {
"status_code": 200,
"message": "Successfully get data user",
"data": {
"sec_user": {
"clientIp": "1.4.2.54",
"officeid": "N/A"
},
"username": "uname",
"name1": "",
"menus": [
{
"appl_id": "MTC",
"menu_caption": "Master",
"menu_path": "/master",
"submenus": [
{
"menu_caption": "Machine List",
"note1": "master",
"sub_menu_id": "1",
"route_path": "/machine_list"
},
{
"menu_caption": "Sparepart Category",
"note1": "master",
"sub_menu_id": "1",
"route_path": "/sparepart_category"
}
]
},
{
"appl_id": "MTC",
"menu_caption": "Master",
"menu_path": "/master",
"submenus": [
{
"menu_caption": "Machine List",
"note1": "master",
"sub_menu_id": "1",
"route_path": "/machine_list"
}
]
}
]
}
};
final jsonItems =
ApiResponse.fromJson(jsonData);
print(jsonItems.message);
}
class ApiResponse {
int statusCode;
String message;
Data data;
ApiResponse({this.statusCode, this.message, this.data});
ApiResponse.fromJson(Map<String, dynamic> json) {
statusCode = json['status_code'];
message = json['message'];
data = json['data'] != null ? new Data.fromJson(json['data']) : null;
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['status_code'] = this.statusCode;
data['message'] = this.message;
if (this.data != null) {
data['data'] = this.data.toJson();
}
return data;
}
}
class Data {
SecUser secUser;
String username;
String name1;
List<Menus> menus;
Data({this.secUser, this.username, this.name1, this.menus});
Data.fromJson(Map<String, dynamic> json) {
secUser = json['sec_user'] != null
? new SecUser.fromJson(json['sec_user'])
: null;
username = json['username'];
name1 = json['name1'];
if (json['menus'] != null) {
menus = new List<Menus>();
json['menus'].forEach((v) {
menus.add(new Menus.fromJson(v));
});
}
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
if (this.secUser != null) {
data['sec_user'] = this.secUser.toJson();
}
data['username'] = this.username;
data['name1'] = this.name1;
if (this.menus != null) {
data['menus'] = this.menus.map((v) => v.toJson()).toList();
}
return data;
}
}
class SecUser {
String clientIp;
String officeid;
SecUser({this.clientIp, this.officeid});
SecUser.fromJson(Map<String, dynamic> json) {
clientIp = json['clientIp'];
officeid = json['officeid'];
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['clientIp'] = this.clientIp;
data['officeid'] = this.officeid;
return data;
}
}
class Menus {
String applId;
String menuCaption;
String menuPath;
List<Submenus> submenus;
Menus({this.applId, this.menuCaption, this.menuPath, this.submenus});
Menus.fromJson(Map<String, dynamic> json) {
applId = json['appl_id'];
menuCaption = json['menu_caption'];
menuPath = json['menu_path'];
if (json['submenus'] != null) {
submenus = new List<Submenus>();
json['submenus'].forEach((v) {
submenus.add(new Submenus.fromJson(v));
});
}
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['appl_id'] = this.applId;
data['menu_caption'] = this.menuCaption;
data['menu_path'] = this.menuPath;
if (this.submenus != null) {
data['submenus'] = this.submenus.map((v) => v.toJson()).toList();
}
return data;
}
}
class Submenus {
String menuCaption;
String note1;
String subMenuId;
String routePath;
Submenus({this.menuCaption, this.note1, this.subMenuId, this.routePath});
Submenus.fromJson(Map<String, dynamic> json) {
menuCaption = json['menu_caption'];
note1 = json['note1'];
subMenuId = json['sub_menu_id'];
routePath = json['route_path'];
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['menu_caption'] = this.menuCaption;
data['note1'] = this.note1;
data['sub_menu_id'] = this.subMenuId;
data['route_path'] = this.routePath;
return data;
}
}