yii\db\Migration::safeUp PHP Method

safeUp() public method

This method differs from Migration::up in that the DB logic implemented here will be enclosed within a DB transaction. Child classes may implement this method instead of Migration::up if the DB logic needs to be within a transaction.

public safeUp ( ) : boolean
return	boolean	return a false value to indicate the migration fails and should not proceed further. All other return values mean the migration succeeds.