Question

I have a Symfony2 form that I want to add a file upload dialog to.

According to the Symfony docs (http://symfony.com/doc/2.0/cookbook/doctrine/file_uploads.html), I have created a Document class:

<?php

namespace Acme\AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\HttpFoundation\File\UploadedFile;
use Symfony\Component\Validator\Constraints as Assert;

/**
 * @ORM\Entity
 * @ORM\HasLifecycleCallbacks
 */
class Document
{

    /**
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    public $id;

    /**
     * @ORM\Column(type="string", length=255, nullable=true)
     */
    public $path;

    /**
     * @Assert\File(maxSize="6000000")
     */
    public $file;


    public function getAbsolutePath()
    {
        return null === $this->path ? null : $this->getUploadRootDir().'/'.$this->path;
    }

    public function getWebPath()
    {
        return null === $this->path ? null : $this->getUploadDir().'/'.$this->path;
    }

    protected function getUploadRootDir()
    {
        // the absolute directory path where uploaded documents should be saved
        return __DIR__.'/../../../../web/'.$this->getUploadDir();
    }

    protected function getUploadDir()
    {
        // get rid of the __DIR__ so it doesn't screw when displaying uploaded doc/image in the view.
        return 'uploads/documents';
    }

    /**
     * @ORM\PrePersist()
     * @ORM\PreUpdate()
     */
    public function preUpload()
    {
        if (null !== $this->file) {
            $this->path = sha1(uniqid(mt_rand(), true)).'.'.$this->file->guessExtension();
        }
    }

    /**
     * @ORM\PostPersist()
     * @ORM\PostUpdate()
     */
    public function upload()
    {
        if (null === $this->file) {
            return;
        }

        $this->file->move($this->getUploadRootDir(), $this->path);

        unset($this->file);
    }

    /**
     * @ORM\PostRemove()
     */
    public function removeUpload()
    {
        if ($file = $this->getAbsolutePath()) {
            unlink($file);
        }
    }

    /**
     * Get id
     *
     * @return integer
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Set path
     *
     * @param string $path
     */
    public function setPath($path)
    {
        $this->path = $path;
    }

    /**
     * Get path
     *
     * @return string
     */
    public function getPath()
    {
        return $this->path;
    }
}

And a DocumentType form class:

<?php

namespace Acme\AppBundle\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;

class DocumentType extends AbstractType
{
        public function buildForm(FormBuilderInterface $builder, array $options)
        {
                $builder
                        ->add('file')
                        ;
        }

        public function setDefaultOptions(OptionsResolverInterface $resolver)
        {
            $resolver->setDefaults(array(
                    'data_class' => 'Acme\AppBundle\Entity\Document',
            ));
        }

        public function getName()
        {
                return 'document_form';
        }
}

However, when I add this to my existing entity and form class:

<?php

namespace Acme\AppBundle\Entity\Profile;

use Doctrine\ORM\Mapping as ORM;
use Acme\AppBundle\Entity\jDocument;
use Symfony\Component\Validator\Constraints as Assert;

/**
 * @ORM\Entity
 * @ORM\Table(name="UserProfile")
 */
class UserProfile extends GenericProfile
{

    //... Other entity params

    /**
     * @ORM\OneToOne(cascade={"persist", "remove"}, targetEntity="Acme\AppBundle\Entity\Document")
     * @ORM\JoinColumn(name="picture_id", referencedColumnName="id", onDelete="set null")
     */
    protected $picture;

    /**
     * Set picture
     *
     * @param Acme\AppBundle\Entity\Document $picture
     */
   //\Acme\AppBundle\Entity\Document  
    public function setPicture($picture)
    {
        $this->picture = $picture;
    }

    /**
     * Get picture
     *
     * @return Acme\AppBundle\Entity\Document
     */
    public function getPicture()
    {
        return $this->picture;
    }

    //... Other entity getters and setters

}

Whenever I submit the form, I get the following error:

ErrorException: Warning: ini_set(): A session is active. You cannot change the session module's ini settings at this time in /var/www/wolseley-integrated-services/builds/dev/app/cache/prod/classes.php line 421

But the page title is “Entity was not found. (500 Internal Server Error)”.

Can anybody spot which entity it can’t find? Or if that’s even the issue?

I’ve done some googling and checked that session.auto_start is set to 0 in php.ini, I’ve cleared all my sessions and caches… I’m stumped!

Answer 1

It turns out I was getting this strange session error message because of an error page definition in my nginx config.

The entity not found issue was resolved by correcting some errors in my entities. The Symfony developer bar provided me with enough information to track the issue down.