Yii Model Custom Rules

yii_model_custom_rules

<?php

// rule for date format
array('birth_date', 'date', 'format'=>'yyyy-mm-dd', 'message'=>'Birth Date, wrong format. Must be YYYY-MM-DD', 'allowEmpty'=>false),

// Check for UNIQUE
// USAGE:  array('email', 'unique'),
public function unique( $attribute, $params )
{
	if( self::model()->count( 't.email=:email', array( ':email' => $this->attribute ) ) > 0 ) $this->addError('email', 'Email already exists');
}

// converters attribute to lowercase
public function lowerCase( $attribute, $params )
{
	strtolower( $this->$attribute );
}

// mandatory checkbox
public function checked( $attribute, $params )
{
	if ( $this->$attribute != 1 )
	{
		$this->addError( $attribute, 'Checkbox is mandatory.' );
	}
}

?>