How to add additional non-entity fields to entity form in Symfony2

Question

I have created form with one element from Entity:

$promo = new Promo();  $form = $this->createFormBuilder($promo)         ->add('code', 'text')         ->getForm(); 

And I want to add file element (this field doesn't exist in the Entity). When I do:

$form = $this->createFormBuilder($promo)         ->add('code', 'text')         ->add('image', 'file')         ->getForm(); 

I have an error: Neither property "image" nor method "getImage()". How can I add this field?

Answer 1

Use mapped:

$form = $this->createFormBuilder($promo)     ->add('code', 'text')     ->add('image', 'file', array(                 "mapped" => false,             ))     ->getForm(); 

In old Symfony versions (2.0 and earlier), use property_path:

$form = $this->createFormBuilder($promo)     ->add('code', 'text')     ->add('image', 'file', array(                 "property_path" => false,             ))     ->getForm(); 

"property_path" was removed in Symfony 2.3