migration, create table

Yii 1.1 General Discussion
1

hi,

how can i define "UNIQUE KEY mobile_number (mobile_number)" within my migration.

thanks




class m110408_145716_create_user_table extends CDbMigration

{

  public function up() {

    $this->createTable('user', array(

      'id' => 'pk',

      'mobile_number' => 'varchar(10) NOT NULL',

    ));

  }

}
2 

$this->createIndex('idxMobileNo', 'table', 'column', true);