「找不到類」主體子查詢

Question

我正在使用Symfony 1.4和Doctrine。我有一個名爲Image的教義類和一個（應該）通過查詢找到下一個和前一個值的方法。有問題的代碼如下所示：

$q = Doctrine_Core::getTable('Image')->createQuery() 
      ->from('Image i') 
      ->where('i.id = (select max(a.id) from Image a where ? > a.id and is_active = 1)', $this->getId()) 
      ->orWhere('i.id = (select min(b.id) from Image b where ? < b.id and is_active = 1)', $this->getId()); 

我總是得到

500 |內部服務器錯誤| Doctrine_Exception找不到類a

錯誤。任何提示？

Answer 1

那麼，事實證明，在這種情況下，Doctrine是大小寫敏感的。工作代碼如下所示：

$q = Doctrine_Core::getTable('Image')->createQuery() 
      ->from('Image i') 
      ->where('i.id = (SELECT MAX(a.id) FROM Image a WHERE ? > a.id AND is_active = 1)', $this->getId()) 
      ->orWhere('i.id = (SELECT MIN(b.id) FROM Image b WHERE ? < b.id AND is_active = 1)', $this->getId());