Client::relations PHP Method

    public function relations()
    {
        return CMap::mergeArray(parent::relations(), ['orders' => [self::HAS_MANY, 'Order', 'user_id', 'order' => 'orders.id DESC'], 'ordersCnt' => [self::STAT, 'Order', 'user_id'], 'ordersSum' => [self::STAT, 'Order', 'user_id', 'select' => 'SUM(total_price)', 'condition' => 'paid = :paid', 'params' => [':paid' => Order::PAID_STATUS_PAID]]]);
    }