I am using Node API with RENDER hosting, while I host the backend it works and when I try to connect the front end and send data I get an exception named Unhandled Exception: type 'String' is not a subtype of type 'int' of 'index' help me, please

note: password is in string and number is an int data type

RoundedButton(
  colour: Colors.lightBlueAccent,
  title: 'Login',
  onPressed: () {
    AuthService().login(number, password).then((val) {
      if (val.data['success']) {
        var token = val.data['token'];
        Fluttertoast.showToast(
            msg: 'SUCCESS',
            toastLength: Toast.LENGTH_SHORT,
            gravity: ToastGravity.BOTTOM,
            timeInSecForIosWeb: 1,
            backgroundColor: Colors.green,
            textColor: Colors.white,
            fontSize: 16.0);
      }
    });
    print('phone: $number && password:$password');
  },
),

class AuthService {
  Dio dio = Dio();
  login(phone, password) async {
    try {
      return await dio.post('https://parkit-odj8.onrender.com/signin',
          data: {"phone": phone, "password": password},
          options: Options(contentType: Headers.formUrlEncodedContentType));
    } on DioError catch (e) {
      Fluttertoast.showToast(
          msg: e.response?.data['msg'],
          toastLength: Toast.LENGTH_SHORT,
          gravity: ToastGravity.BOTTOM,
          backgroundColor: Colors.red,
          textColor: Colors.white,
          fontSize: 16.0);
    }
  }
}

This is my code I tried looking up everything and tried changing my data types but still no use

CodePudding user response：

Just write number.toString() it will convert it from string to int.

CodePudding user response：

Basically, you tried to assign a String to a property that accepts only an int, example of what you did:

String a = "100";
int b = a;  // throws an error

so you need to go from that String and convert it to an int, you can use int.parse(/*String*/):

String a = "100";
int b = int.parse(a);  // 100

that's what you need to do in your case.

Note: you can do the reverse and convert an int to String with the toString() method:

int b = 100;
String a = b.toString();  // "100"