Passing and Comparing a controller in Flutter - flutter

Question

I have a form with 2 password inputs , one for password and the second to confirm it.
I was trying to do it like that :
final _passwordController = TextEditingController();
final _confirmpasswordController = TextEditingController();
String passwordInputValidator(TextEditingController _passwordController, value) {
if (value =! _passwordController.text) {
return 'Password doesnt match';
}
}
MakeInput('Type your password', true,
nameInputValidator, _passwordController)),
MakeInput(
'Confirm Password',
true,
passwordInputValidator,
_confirmpasswordController)),
Widget MakeInput(label, obscureText, validator, controller) {
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(
label,
style: TextStyle(
fontSize: 15, fontWeight: FontWeight.w400, color: Colors.white),
),
SizedBox(
height: 5,
),
TextFormField(
obscureText: obscureText,
controller: controller,
style: TextStyle(color: Colors.white),
decoration: InputDecoration(
contentPadding:
EdgeInsets.symmetric(vertical: 0, horizontal: 12),
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.purple[800])),
border: OutlineInputBorder(
borderSide: BorderSide(color: Colors.purple[800])),
focusedBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.purple[800], width: 2.0),
)),
validator: validator),
This validator is the validator for the confirm password TextField.
So I tried passing the first password entered value as an argument in my validator and to compare it with my value which is the confirmed password.
I got this error in my function : A negation operand must have a static type of 'bool'. Try changing the operand to the '!'
I assume the error because of the dynamic type of the argument, but how to fix this error or even if there is any logic error .

Answer 1

You are passing the wrong comparison oparator =! use != instead
String passwordInputValidator(
TextEditingController _passwordController, value) {
if (value != _passwordController.text) {
return 'Password doesnt match';
}
}