Use Doctrine ArrayCollection in symfony custom command

Question

I would like to use ArrayCollection in a custom symfony command.

But my way is throwing an error

The class 'Doctrine\\Common\\Collections\\ArrayCollection' was not found in the chain configured namespaces AppBundle\\Entity

My command

<?php

namespace AppBundle\Command;

use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
use Doctrine\Common\Collections\ArrayCollection;
use AppBundle\Entity\Gameworld;

class MyCommand extends ContainerAwareCommand
{
    protected function configure()
    {
        $this
            ->setName('get:gw')
            ->setDescription('Populate gameworld')
        ;
    }

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $em = $this->getContainer()->get('doctrine')->getManager();

        $output->writeln('<info>Get current Gameworlds</info>');
        $gws = $em->getRepository('AppBundle:Gameworld')->findAll();

        $gws = new ArrayCollection($gws);

        /* rest of the command */
    }
}

I tried to do new \\Doctrine\\Common\\Collections\\ArrayCollection($gws);

But the error is still there.

Hope you may help.

Answer 1

You probably tries to create instance of ArrayCollection in Gameworld constructor(or somewhere in related entities constructors), but you did not imported it with use Doctrine\\Common\\Collections\\ArrayCollection; call. Try to check your AppBundle\\Entity\\Gameworld class and its related entities for occurances of ArrayCollection and check whether you import it properly inside that classes.