Could not determine access type for property “file”

Question

I have a little problem with my image upload, can u help me please:

Could not determine access type for property \"file\".

Answer 1

Please add "'mapped' => false," to form builder.

public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder
   ->add('file', FileType::class, 
     array(
        'data_class' => null,
        'mapped' => false,            
    ))
    ->add('name', TextType::class)
    ;
 }

Those who say that it is wrong to dissolve, see the test there. I'm not the one who made it wrong.

Test code: https://github.com/symfony/property-access/blob/master/Tests/PropertyAccessorCollectionTest.php#L151

A second solution is to add function setXxx to the property that gives an error in class Entity.

public $xxx;

public function setXxx(Array $xxx)
{
    $this->xxx = $xxx;
}

Or

public function __construct()
{
    $this->xxx = new ArrayCollection();
}

Video Link: https://knpuniversity.com/screencast/doctrine-relations/create-genus-note

My English is bad, I can tell you.

Answer 2

Stumbled on this while searching solution for my problem, that was shooting the same error and I was using also ArrayCollection class, so this may be helpful to someone:

My field in ArrayCollection is called $files, so I had to add constructor like this:

use Doctrine\Common\Collections\ArrayCollection;

public function __construct()
{
    $this->files = new ArrayCollection();
}

Then I added add and remove methods, like this:

public function addFile(MyFile $file) : self
{
    $file->setParentMyItem($this); // Setting parent item 
    $this->files->add($file);
    return $this;
}

public function removeFile(MyFile $file) : self
{
    $this->files->removeElement($file);
    return $this;
}

But catch is that even my field name was $files I had to name add and remove methods addFile() and removeFile(), without 's' at end, which is totally not logical to me, but that solved the problem.

Answer 3

Same error for me but on a OneToMany relation. Although setting "mapped => false" also solved the error there is another option. I only had a getter, adder and remover method on the entity. I needed to add a "setter" too

In my case it was:

/**
 * @param ArrayCollection|SubStatusOptions[]
 */
public function setSubStatusOptions(ArrayCollection $subStatusOptions)
{
    $this->subStatusOptions = $subStatusOptions;
}

Answer 4

Setting mapped => false is not the real solution, because the field IS mapped to the entity.

In my case, I have a OneToMany relation, so I need the field mapped in order to use the 'cascase' => {"all"} option.

If the field is not mapped, then you must to persist the related entity manually. That's no good.