laravel - "Not" operator in validation rule -

i have custom validation rule, is_admin, checks if user administrator.

does laravel have "opposite" operator (like how ! works in php), such can not:is_admin, check user isn't admin:

$rules = array(     'user_id' => 'required|numeric|not:is_admin' );  $validator = validator::make(input::all(), $rules);  if ($validator->fails()) {     // return error } else {     // continue } 

thanks.

yes, can validate through required_if:field,value. can check more details @ http://laravel.com/docs/5.0/validation#rule-required-if

or can use not_in:foo,bar. can check more details @ http://laravel.com/docs/5.0/validation#rule-not-in