Symfony2 在自定义存储库类中使用查询

Question

我有一个带有调用自定义查询方法的存储库类。当我尝试从控制器内部调用 findAllWithRating() 时，出现以下异常：

[2/2] QueryException: [Syntax Error] line 0, col 156: Error: Unexpected 'NULL'

如果我尝试在 phpmyadmin 中调用查询，则查询效果很好！

有什么想法吗？

<?php
namespace Anchorbrands\Bundle\MessageBundle\Entity;

use Doctrine\ORM\EntityRepository;

class MessageRepository extends EntityRepository
{

    public function findAllWithRating() {
        return $this->getEntityManager()
            ->createQuery("SELECT id, user_id, title, slug, content, question, image_name, created_at, updated_at,
                    MAX(CASE WHEN rating = '1' THEN totalCount ELSE NULL END) 'Rating 1',
                    MAX(CASE WHEN rating = '2' THEN totalCount ELSE NULL END) 'Rating 2',
                    MAX(CASE WHEN rating = '3' THEN totalCount ELSE NULL END) 'Rating 3'
            FROM
            (
                SELECT  a.id, a.user_id, a.title, a.slug , a.content, a.question, a.image_name, a.created_at, a.updated_at,
                        rating, COUNT(*) totalCount
                FROM    AnchorbrandsMessageBundle:Message a
                        LEFT JOIN AnchorbrandsMessageBundle:Rating b
                            ON a.id = message_id
                GROUP BY a.id, a.user_id, a.title, a.slug, a.content, a.question, a.image_name, a.created_at, a.updated_at, rating
            ) r
            GROUP BY id, user_id, title, slug, content, question, image_name, created_at, updated_at")->getResult();
    }

}

Answer 1

您似乎混合使用了 DQL 和 SQL。您可以看看 DQL here 有什么可能。

查看您的查询，我建议您使用 SQL 而不是 DQL。

如何在存储库中执行 SQL 查询的示例：

$sql = 'SELECT * FROM table WHERE id = :id';
$params = array(
    'id' => 4,
);

return $this->getEntityManager()->getConnection()->executeQuery($sql, $params)->fetchAll();