帶聯接的Doctrine DQL條件查詢

Question

我正在嘗試使用Doctrine的查詢構建器構建動態查詢。 我有可選參數。 我如何有條件地將這個添加到聲明中？我也有關聯（例如， Service與Category有多對一的關系）

 $qb = $this->createQueryBuilder('service');
 $qb->join('service.category', 'category');

 $conditions = array();

 if ($categoryId != null) {

        $category = $this->getEntityManager()
            ->getRepository('AppBundle:Category')->find($categoryId);

        if($category == null){
            throw new ApiException('category not found');
        }

        $conditions[] = $qb->expr()->like('category.path', $category->getPath().'%');
    }

 if ($userId != null) {
        $user = $this->getEntityManager()->getRepository('AppBundle:User')->find($userId);
        if($user == null){
            throw new ApiException('user not found');
        }

        $conditions[] = $qb->expr()->eq('service.user', $userId);
    }

  if ($rating != null) {
        $conditions[] = $qb->expr()->gte('service.rating', $rating);
    }

 $conditions = call_user_func_array(array($qb->expr(), 'andX'), $conditions);

 $qb->where($conditions);

 $qb->addOrderBy('service.created', 'DESC');

 return $qb;
}

當我嘗試發送查詢

http://127.0.0.1:8000/api/services?limit=10&categoryId=45

我收到以下錯誤：

Error: Expected StateFieldPathExpression | string | InputParameter | FunctionsReturningStrings | AggregateExpression, got "45" (500 Internal Server Error)

Answer 1

嘗試使用給定參數的Literal表達式。 試試這個：

$conditions[] = $qb->expr()->gte('service.rating', $this->expr()->literal($rating));

而不是這個：

$conditions[] = $qb->expr()->gte('service.rating', $rating);

希望這有幫助