Validation for roll number unique to each semester

Here's validator for registering new users (students), 'users' is provider for 'User' model. 'roll' is unique for every users but I want it to be unique only to users of each semester. Code :

protected function validator(array $data) { return Validator::make($data, [ 'name' => 'required|max:255', 'email' => 'required|email|max:255|unique:users|unique:admins|unique:teachers', 'password' => 'required|min:6|confirmed', 'roll' => 'required|integer|min:0|unique:users', 'semester' => 'required', ]); }

danmatthews

8 years ago

Level 5

Since the value of semester is required, you could add a custom validation rule:

https://laravel.com/docs/5.4/validation#custom-validation-rules

Maybe call it unique_to_semester ? then your rules would look like:

return Validator::make($data, [
  'name' => 'required|max:255',
  'email' => 'required|email|max:255|unique:users|unique:admins|unique:teachers', 
  'password' => 'required|min:6|confirmed',
  'roll' => 'required|integer|min:0|unique:users|unique_to_semester',
  'semester' => 'required'
]);

I think you can use the request() function inside the extend callback to get information from any input - but i'm not 100%, sorry!

Validator::extend('foo', function ($attribute, $value, $parameters, $validator) {
  // If semester isn't set, this rule isn't valid.
  if (empty(request('semester')) {
    return false;
  }

  // Check that the "roll" ($value) is unique only to that semester.
// return true if it passes the test
// return false if it doesn't
});

Please or to participate in this conversation.