Nextras\Datagrid\Datagrid::getData PHP Метод

    protected function getData($key = null)
    {
        if (!$this->data) {
            $onlyRow = $key !== null && $this->presenter->isAjax();
            if (!$onlyRow && $this->paginator) {
                $itemsCount = call_user_func($this->paginatorItemsCountCallback, $this->filterDataSource, $this->orderColumn ? [$this->orderColumn, strtoupper($this->orderType)] : null);
                $this->paginator->setItemCount($itemsCount);
                if ($this->paginator->page !== $this->page) {
                    $this->paginator->page = $this->page = 1;
                }
            }
            $this->data = call_user_func($this->dataSourceCallback, $this->filterDataSource, $this->orderColumn ? [$this->orderColumn, strtoupper($this->orderType)] : null, $onlyRow ? null : $this->paginator);
        }
        if ($key === null) {
            return $this->data;
        }
        foreach ($this->data as $row) {
            if ($this->getter($row, $this->rowPrimaryKey) == $key) {
                return $row;
            }
        }
        throw new \Exception('Row not found');
    }