php - how to add custom username available and email available methods as rules in kohana -


What is the correct format to add rules to check unique username and email in Kochi 3.3 < P> I have follow-up 

  array (Array ($ $, 'unique'), array ('username', ': value')); // Like the email has been added ('username', array ('unique_username', 'array' (': value')); / / / Added as well as email, public static work unique_username ($ username) {echo 'Running'; // Check that the database returns if the user name already exists! DB :: select (array (DB :: expr ('COUNT (username)' ('user') -> where ('username' , '=', $ Username)) -> execute () -> Get ('total');}   
 I get the following error  
 
 Log 3 to Kohana_Validation :: rule () An array passed, string given    
 
 
 I can not give you an exact answer because You do not show your class name. For example, if your class was named  Model_User  here, here's how you would use a static method as a statutory callback:  
  -> Rule ('Username', 'Model_User :: unique_username', array (': value'));   
 or  
  -> Rule ('username', array ('model_use', 'unique_namename'), array (': value'));

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