如何将服务注入 symfony 命令？

Question

I have this basic Symfony command class

class MyCommand extends Command
{

    protected EntityManagerInterface $em;

    public function __construct(EntityManagerInterface $em)
    {
        $this->em = $em;
        parent::__construct();
    }

    protected function configure()
    {
        $this
            ->setName('my:command')
            ->setDescription('what my command does');
    }

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        echo 'Hello World';
    }

}

if I run bin/console my:command I get an error saying the command does not exists.

If I comment out the constructor then I can see the output. autoconfigure and autowire are set to true.

this is services.yml:

_defaults:
    autowire: true
    autoconfigure: true

same thing if I use

my_command:
        class: Path\To\MyCommand
        arguments:
            - "@doctrine.orm.entity_manager"

Answer 1

Looks like the way you have written your property is wrong. Can you change it from:

protected EntityManagerInterface $em;

to:

protected $em;

and try again.