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.

Have you looked at [Relationship Mapping Metadata](https://symfony.com/doc/current/doctrine/associations.html#relationship-mapping-metadata)? Normally `ArrayCollection` is used in Entities for mapping. Your error says it's in the Entity file not the command file. — Alvin Bunk, Sep 10 '17 at 15:24
@AlvinBunk `ArrayCollection` can also be used in controllers so maybe in custom commands too — Théo Attali, Sep 10 '17 at 16:17
`throw $gws = new ArrayCollection();` return `[Symfony\Component\Debug\Exception\FatalThrowableError] Cannot throw objects that do not implement Throwable` — Théo Attali, Sep 10 '17 at 16:23
You don't understand what ArrayCollection is used for, also you can't pass a parameter to it when constructing a new object. Instead use `new ArrayCollection()`. Please [read this so question](https://stackoverflow.com/questions/29180651/arraycollection-in-symfony) to understand how it is used. In that answer,@AlexandruOlaru give a good example of how to use it. — Alvin Bunk, Sep 10 '17 at 17:35

score 1 · Answer 1 · answered Sep 11 '17 at 08:56

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.

Use Doctrine ArrayCollection in symfony custom command

1 Answers1