Version

Documentation » Admin

Modifying form fields dynamically depending on edited object ============================================================ It is a quite common situation when you need to modify your form's fields because of edited object's properties or structure. Let us assume you only want to display an admin form field for new objects and you do not want it to be shown for those objects that have already been saved to the database and now are being edited. This is a way for you to accomplish this. In your ``Admin`` class' ``configureFormFields`` method you are able to get the current object by calling ``$this->getSubject()``. The value returned will be your linked model. And another method ``isCurrentRoute`` for check the current request's route. Then, you should be able to dynamically add needed fields to the form:: // src/Admin/PostAdmin namespace App\Admin; use Sonata\AdminBundle\Admin\AbstractAdmin; use Sonata\AdminBundle\Form\FormMapper; use Symfony\Component\Form\Extension\Core\Type\TextType; use Symfony\Component\Form\Extension\Core\Type\TextareaType; use Symfony\Component\Form\Extension\Core\Type\FileType; final class PostAdmin extends AbstractAdmin { // ... protected function configureFormFields(FormMapper $formMapper) { // Description field will always be added to the form: $formMapper ->add('description', TextareaType::class) ; $subject = $this->getSubject(); if ($subject->isNew()) { // The thumbnail field will only be added when the edited item is created $formMapper->add('thumbnail', FileType::class); } // Name field will be added only when create an item if ($this->isCurrentRoute('create')) { $formMapper->add('name', TextType::class); } // The foo field will added when current action is related acme.demo.admin.code Admin's edit form if ($this->isCurrentRoute('edit', 'acme.demo.admin.code')) { $formMapper->add('foo', 'text'); } } }

Found a typo? Something is wrong in this documentation? Just fork and edit it!