在控制器中我会这样做：
$nodes = $this->getDoctrine()
->getRepository('MyFreelancerPortfolioBundle:TreeNode')
->findAll();
$em = $this->getDoctrine()->getManager();
foreach($nodes as $node)
{
$em->remove($node);
}
$em->flush();
从我得到的命令中的execute()函数执行此操作：
Call to undefined method ..... ::getDoctrine();
请参阅命令文档章节 – Getting Services from the Container.
use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand;
// ... other use statements
class MyCommand extends ContainerAwareCommand
{
protected function execute(InputInterface $input,OutputInterface $output)
{
$em = $this->getContainer()->get('doctrine')->getEntityManager();
// ...
