编写一个简单的查询并解决： [Syntax Error] line 0, col 7: Error: Expected IdentificationVariable

Question

我遇到了这个错误，我想了解一下：

[语法错误] 第 0 行，第 7 列：错误：预期标识变量 | 标量表达式 |聚合表达式 |功能声明 | 部分对象表达式 | "(" 子选择 ")" | CaseExpression，得到 '选择'

因为我已经这样做了：

public function findByBookings($start, $leave): array
{
    $qb = $this->createQueryBuilder('SELECT * FROM room as r JOIN booking as b ON r.id = b.r WHERE b.r NOT IN 
    (SELECT b.room FROM b WHERE b.startDate <= :startDate AND b.leaveDate >= :leaveDate, OR WHERE b.startDate >= :startDate AND b.leaveDate <= :leaveDate, OR WHERE b.startDate >= :startDate AND b.leaveDate >= :leaveDate, OR WHERE b.startDate <= :startDate AND b.leaveDate <= :leaveDate)')
        ->setParameter(':start', $start)
        ->setParameter(':leave', $leave);

    $query = $qb->getQuery();

    $results = $query->getResult();

    return $results;

  }

如果我将 $this->createQueryBuilder 更改为 $this->createQuery() 我还有另一个错误：

未定义的方法“createQuery”。方法名称必须以 findBy、findOneBy 或 countBy！

为什么 Symfony 会在我的函数名称以“findBy”开头时返回此错误？

谢谢

Answer 1

首先你需要修复查询

$dql = <<<EOL
SELECT * 
FROM room AS r 
  JOIN booking AS b ON r.id = b.r 
 WHERE b.r NOT IN 
    (SELECT b.room 
     FROM booking AS b
     WHERE 
       b.startDate <= :startDate AND b.leaveDate >= :leaveDate OR  
       b.startDate >= :startDate AND b.leaveDate <= :leaveDate OR 
       b.startDate >= :startDate AND b.leaveDate >= :leaveDate OR
       b.startDate <= :startDate AND b.leaveDate <= :leaveDate
    ) AS subq
EOL;

然后让实体管理器对其执行原始查询。

$query = $this->getEntityManager()
     ->createQuery($dql)
     ->setParameter('startDate', $start)
     ->setParameter('leaveDate', $leave);

$results = $query->getResult();