不带说明的Symfony2和Doctrine2 PDOException

Question

我想使用这段代码，但它在flush()时中断，没有任何异常消息：

1. at PDOStatement ->execute (null) 
in ../vendor/doctrine-dbal/lib/Doctrine/DBAL/Statement.php at line 131    
2. at Statement ->execute () 
in ../vendor/doctrine/lib/Doctrine/ORM/Persisters/BasicEntityPersister.php at line 237    
3. at BasicEntityPersister ->executeInserts () 
in ../vendor/doctrine/lib/Doctrine/ORM/UnitOfWork.php at line 726    
4. at UnitOfWork ->executeInserts (object(ClassMetadata)) 
in ../vendor/doctrine/lib/Doctrine/ORM/UnitOfWork.php at line 292    
5. at UnitOfWork ->commit () 
in ../vendor/doctrine/lib/Doctrine/ORM/EntityManager.php at line 334    
6. at EntityManager ->flush () 
in ../src/Tools/TFIBundle/Model/CSVImport.php at line 136    
7. at CSVImport ->addCategory ('fundusz obligacji') 
in ../src/Tools/TFIBundle/Model/CSVImport.php at line 114

addCategory()方法看起来：

public function addCategory( $categoryName )
{
    $category = new Category();
    $category->setName( $categoryName );

    $this->em->persist( $category );
    $this->em->flush();
    $this->counter['category']++;

    return $category;
}

你知道哪里出问题了吗？或者如何在symfony2中获取PDOException消息？

Answer 1

几秒钟前我也遇到了同样的问题。当我进入生产模式并关闭会话时，它得到了修复。当你做一些事情，比如在会话仍然存在的情况下，用大量的更改替换整个文件夹时，看起来开发模式在会话方面有问题。

尝试清除您的会话，它可能会起作用。