How can I solved this error in flutter class code-CodePudding

I write this class

class Profile {
  String email;
  String password;

  Profile({this.email, this.password});
}

But it said that

"The parameter 'email' can't have a value of 'null' because of its type, but the implicit default value is 'null'.
Try adding either an explicit non-'null' default value or the 'required' modifier.dartmissing_default_value_for_parameter"

CodePudding user response：

By adding required:

class Profile {
  String email;
  String password;

  Profile({
    required this.email,
    required this.password,
  });
}

By adding optional:

class Profile {
  String? email;
  String? password;

  Profile({
    this.email,
    this.password,
  });
}

By adding default values:

class Profile {
  String email;
  String password;

  Profile({
    this.email = "[email protected]",
    this.password = "123",
  });
}

CodePudding user response：

You have to make them accept a null value.

class Profile {
  String? email;
  String? password;

  Profile({this.email, this.password});
}