Unhandled Exception: type 'String' is not a subtype of type 'int' of 'index' Problem Dart & flutter - flutter

Question

I have this variables problem
this is my getdata function
Future <List <Deal>> getData() async{
String myUrl = "http://10.25.20.27:5000/api/all";
var response = await http.get(myUrl,
headers: {
'Accept':'application/json',
});
var jsonData = json.decode(response.body);
List<Deal> deals =[];
var u;
for( u in jsonData){
Deal deal = Deal(u["id"],u["name"],u["adress"],u["photo"],u["Description"],u["discount"]);
}
return deals;
}
And I got this error
Performing hot reload...
Reloaded 14 of 594 libraries in 902ms.
E/flutter ( 4211): [ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: type 'String' is not a subtype of type 'int' of 'index'
E/flutter ( 4211): #0 DatabaseHelper.getData (package:flutter_app/databasehelper.dart:116:25)
E/flutter ( 4211):
E/flutter ( 4211): #1 _HomeePageState.build. (package:flutter_app/homee_page.dart:100:80)
E/flutter ( 4211): #2 _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:654:14)
E/flutter ( 4211): #3 _InkResponseState.build. (package:flutter/src/material/ink_well.dart:729:32)
E/flutter ( 4211): #4 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:182:24)
E/flutter ( 4211): #5 TapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:365:11)
E/flutter ( 4211): #6 TapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:275:7)
E/flutter ( 4211): #7 PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:455:9)

Answer 1

I think you can create "Deal" class like below:-
class Deal {
String id;
String name;
String adress;
String photo;
String Description;
String discount;
Deal(
this.id,
this.name,
this.adress,
this.photo,
this.Description,
this.discount,
);
}
Then you can use loop like below :-
var u;
for (u in jsonData) {
Deal deal = Deal(
u["id"].toString(),
u["name"].toString(),
u["adress"].toString(),
u["photo"].toString(),
u["Description"].toString(),
u["discount"].toString());
}