带有 COUNT 和 GROUP BY 的 Extbase 数据库查询

Question

我正在尝试在我的存储库中创建一个 DBquery。我已经有一个工作，但我想要的是调整它以使用约束而不是使用 setReturnRawQueryResult(TRUE)。所以我想在表中找到所有不同类型的 $values 并计算它们有多少存在。这是我的代码：

public function findAllDistinct($value, $category) {

    $query = $this->createQuery();

    $query->getQuerySettings()->setReturnRawQueryResult(TRUE);

    return $query
      ->statement('SELECT ' . $value . ', COUNT(*) AS \'num\' '
                . 'FROM tx_myextension_domain_model_job '
                . 'WHERE job_category =' . $category . ' '
                . 'GROUP BY ' .$value.'')
      ->execute();
}

顺便问一下，如何实现“SELECT DISTINCT”？

Answer 1

您可以做的是提供一个新的模型和存储库，您可以在其中编写查询。例如。如果您的新模型包含将被映射的属性num。

我不确定TCA 在这种情况下是否需要。但请确保您提供 uid 作为属性并且它是唯一的。

型号：

<?php
namespace Vendor\ExtKey\Domain\Model;


/**
 * @author Daniel Siepmann <d.siepmann@web-vision.de>
 */
class FilterOption extends \TYPO3\CMS\Extbase\DomainObject\AbstractEntity
{
    /**
     * @var string
     */
    protected $title;

    /**
     * @var float
     */
    protected $value;

    /**
     * @var float
     */
    protected $min;

    /**
     * @var float
     */
    protected $max;

    /**
     * @return string
     */
    public function getTitle()
    {
        return $this->title;
    }

    /**
     * @return float
     */
    public function getValue()
    {
        return $this->value;
    }

    /**
     * @return float
     */
    public function getMin()
    {
        return $this->min;
    }

    /**
     * @return float
     */
    public function getMax()
    {
        return $this->max;
    }
}

存储库：

<?php
namespace Vendor\ExtKey\Domain\Repository;


/**
 *
 * @author Daniel Siepmann <d.siepmann@web-vision.de>
 */
class FilterOptionRepository extends \TYPO3\CMS\Extbase\Persistence\Repository
{
    /**
     * Will find all options to filter for for a specific property.
     *
     * @param string $property The name of the property.
     *
     * @return NULL|[]
     */
    public function findFilterOptionForProperty($property)
    {
        if (in_array($property, [ 'house_types' ])) {
            return $this->findMmOptions($property);
        }
        return $this->findNumericOptions($property);
    }

    /**
     * Will find all options to filter for for a specific property.
     *
     * @param string $property The name of the property.
     *
     * @return NULL|[]
     */
    protected function findNumericOptions($property)
    {
        return $this->createQuery()
            ->statement($this->getNumericStatement($property))
            ->execute();
    }

    /**
     * Get SQL statement to fetch filter options from persistence,
     * for the given property if it's values are numeric.
     *
     * @param string $property The property to fetch.
     *
     * @return string The statement
     */
    protected function getNumericStatement($property)
    {
        // We have to fake UID, otherwise extbase will reuse previous
        // objects with same uid.
        $uidBase = rand(ord($property), getrandmax());

        // Return statement for single column.
        return '
            SELECT "' . $property . '" AS title, ' . $property . ' AS value,
                (SELECT min(' . $property . ') FROM tx_realty_objects WHERE ' . $this->getAdditionalWhereClause() . ') AS min,
                (SELECT max(' . $property . ') FROM tx_realty_objects WHERE ' . $this->getAdditionalWhereClause() . ') AS max,
                @rownum := @rownum + ' . $uidBase . ' AS uid
            FROM tx_realty_objects,
            (SELECT @rownum:=' . $uidBase . ') x
            WHERE ' . $this->getAdditionalWhereClause() . '
            GROUP BY ' . $property . '
            ORDER BY value;
        ';
    }
}