Error in `day8` code

[Shivansh-yadav13]

30DaysOfFlutter/lib/pages/login_page.dart

Line 65 in e7578cf

if (value.isEmpty) {

This does not work anymore, it gives an error

The property 'isEmpty' can't be unconditionally accessed because the receiver can be 'null'. 

Similarly,

30DaysOfFlutter/lib/pages/login_page.dart

Line 16 in e7578cf

if (_formKey.currentState.validate()) {

This also give error

The method 'validate' can't be unconditionally invoked because the receiver can be 'null'. 

[lazysquid7]

Did you find any alternative how to do it?

[lazysquid7]

value.isEmpty can be replaced with =>> value == null / value.isNull
But how to resolve other issue?

[lazysquid7]

Use below code to resolve the issue.
If you are getting an error in the TextFormField validator, your condition should be :
validator: (value) {
if (value ==null || value.isEmpty) {
return "Username cannot be empty";
}

Similar in both username and password.

And in the moveToHome() method validation condition should be:
if(_formkey.currentState!.validate()){};

[malik-vishu]

`validator: (value) {
if (value != null && value.isEmpty) {
return "Username cannot be empty";
}

  return null;

}`

`moveToHome(BuildContext context) async {
if (formKey.currentState != null && formKey.currentState!.validate()) {
setState(() {
change = true;
});

  await Future.delayed(const Duration(seconds: 1));
  await Navigator.pushNamed(context, AllRoutes.homeRoute);
  setState(() {
    //rendering again on coming back
    change = false;
  });
}

}`