yii: how to make a unique rule for two attributes

Question

I have a table like this: (id, name, version, text). (name, version) is unique key, how can i make a rule to validate this.

Answer 1

Based on the function above, here is one function you can add onto your ActiveRecord Model

You would use it like so,

array( array('productname,productversion'), 'ValidateUniqueColumns', 'Product already contains that version'),


/*
 * Validates the uniqueness of the attributes, multiple attributes
 */
public function ValidateUniqueColumns($attributes, $params)
{
    $columns = explode(",", $attributes);
    //Create the SQL Statement
    $select_criteria = "";
    $column_count = count($columns);
    $lastcolumn = "";

    for($index=0; $index<$column_count; $index++)
    {
        $lastcolumn = $columns[$index];
        $value = Yii::app()->db->quoteValue( $this->getAttribute($columns[$index]) );
        $column_equals = "`".$columns[$index]."` = ".$value."";
        $select_criteria = $select_criteria.$column_equals;
        $select_criteria = $select_criteria."  ";
        if($index + 1 < $column_count)
        {
            $select_criteria = $select_criteria." AND ";
        }
    }

    $select_criteria = $select_criteria." AND `".$this->getTableSchema()->primaryKey."` <> ".Yii::app()->db->quoteValue($this->getAttribute( $this->getTableSchema()->primaryKey ))."";

    $SQL = " SELECT COUNT(`".$this->getTableSchema()->primaryKey."`) AS COUNT_ FROM `".$this->tableName()."` WHERE ".$select_criteria;

    $list = Yii::app()->db->createCommand($SQL)->queryAll();
    $total = intval( $list[0]["COUNT_"] );

    if($total > 0)
    {
        $this->addError($lastcolumn, $params[0]);
        return false;
    }

    return true;
}