Symfony2-如何在自定义控制台命令中访问服务?

问题描述：

我是Symfony的新手.我创建了一个自定义命令，其唯一目的是擦除系统中的演示数据，但我不知道该怎么做.

I am new to Symfony. I have created a custom command which sole purpose is to wipe demo data from the system, but I do not know how to do this.

在控制器中，我会这样做:

In the controller I would do:

$nodes = $this->getDoctrine()
    ->getRepository('MyFreelancerPortfolioBundle:TreeNode')
    ->findAll();

$em = $this->getDoctrine()->getManager();
foreach($nodes as $node)
{
    $em->remove($node);
}
$em->flush();

通过我得到的命令中的execute()函数执行此操作:

Doing this from the execute() function in the command I get:

Call to undefined method ..... ::getDoctrine();

我该如何从execute()函数执行此操作?另外，如果要擦除数据而不是遍历数据并删除它们，是一种更简便的方法，请随时提及.

How would I do this from the execute() function? Also, if there is an easier way to wipe the data other than to loop through them and remove them, feel free to mention it.

答

为了能够访问服务容器，您的命令需要扩展

In order to be able to access the service container your command needs to extend Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand.

请参阅命令"文档章节-

See the Command documentation chapter - 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();
        // ...

Symfony2-如何在自定义控制台命令中访问服务?

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