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<?php |
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namespace Nayjest\Querying; |
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use Exception; |
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use Nayjest\Querying\Exception\ManualInterruptProcessingException; |
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use Nayjest\Querying\Handler\Priority; |
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use Nayjest\Querying\Operation\CloneOperation; |
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use Nayjest\Querying\Operation\CustomOperation; |
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use Nayjest\Querying\Operation\FetchOperation; |
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use Nayjest\Querying\Operation\SortOperation; |
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abstract class AbstractDatabaseQuery extends AbstractQuery |
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{ |
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abstract public function getSQL(); |
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abstract protected function getCountInternal(); |
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/** |
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* AbstractDatabaseQuery constructor. |
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* @param $dataSource |
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* @param string $rowClass |
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*/ |
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public function __construct($dataSource, $rowClass) |
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{ |
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parent::__construct($dataSource, $rowClass); |
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$this->addOperations( |
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[ |
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new CloneOperation(), |
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new FetchOperation(), |
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] |
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); |
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} |
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/** |
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* Returns query builder with all database operations applied. |
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* |
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* @return object |
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* @throws Exception |
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*/ |
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protected function getReadyQuery() |
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{ |
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$readyQuery = null; |
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$operation = new CustomOperation( |
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function ($query) use (&$readyQuery) { |
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$readyQuery = $query; |
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throw new ManualInterruptProcessingException; |
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}, |
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// before fetch |
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Priority::FETCH + 1 |
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); |
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$this->addOperation($operation); |
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try { |
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$this->get(); |
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} catch (ManualInterruptProcessingException $e) { |
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// This exception is expected, don't needs further processing |
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} |
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$this->removeOperation($operation); |
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if (!is_object($readyQuery)) { |
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throw new Exception("Failed to interrupt processing for extracting query object."); |
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} |
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return $readyQuery; |
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} |
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/** |
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* @return int |
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*/ |
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public function count() |
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{ |
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$removed = []; |
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/** remove sorting because it will produce invalid SQL that fails on Postgres |
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* @see https://github.com/view-components/view-components/issues/33 |
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*/ |
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foreach ($this->getOperations() as $operation) { |
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if ($operation instanceof SortOperation) { |
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$this->removeOperation($operation); |
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$removed[] = $operation; |
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} |
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} |
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$count = $this->getCountInternal(); |
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$this->addOperations($removed); |
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return $count; |
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} |
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} |
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Nayjest /
Querying
