Sonata Admin Bundle One-to-Many relationship not saving foreign ID

Question

I have a problem with the SonataAdminBunle in combination with symfony 2.2. I have a Project entity and a ProjectImage entity and specified a One-to-Many relationship betwee

Answer 1

Since some things have changed with Symfony form collection now adding the addChild() and removeChild() with the by_reference option set to false automatically persist the Collection and set the ID on the inverse side as expected.

Here is a full working version: https://gist.github.com/webdevilopers/1a01eb8c7a8290d0b951

protected function configureFormFields(FormMapper $formMapper)
{
    $formMapper
        ->add('childs', 'sonata_type_collection', array(
            'by_reference' => false
        ), array(
            'edit' => 'inline',
            'inline' => 'table'
        ))
    ;
}

The addChild() method must contain the setter for the parent on the child:

public function addChild($child)
{
    $child->setParent($this); // !important
    $this->childs[] = $child;
    return $this;
}