Inherit form or add type to each form

Have you tried using inheritance?

This is really simple, first you have to define a form type:

# file: Your\Bundle\Form\BaseType.php<?phpnamespace Your\Bundle\Form\Type;use Symfony\Component\Form\AbstractType;use Symfony\Component\Form\FormBuilderInterface;use Symfony\Component\OptionsResolver\OptionsResolverInterface;class BaseType extends AbstractType{    public function buildForm(FormBuilderInterface $builder, array $options)    {        $builder->add('name', 'text');        $builder->add('add', 'submit');    }    public function setDefaultOptions(OptionsResolverInterface $resolver)    {        $resolver->setDefaults(array(            'data_class' => 'Your\Bundle\Entity\YourEntity',        ));    }    public function getName()    {        return 'base';    }}

Then you can extend this form type:

# file: Your\Bundle\Form\ExtendType.php<?phpnamespace Your\Bundle\Form\Type;use Symfony\Component\Form\AbstractType;use Symfony\Component\Form\FormBuilderInterface;use Symfony\Component\OptionsResolver\OptionsResolverInterface;class ExtendType extends BaseType{    public function buildForm(FormBuilderInterface $builder, array $options)    {        parent::buildForm($builder, $options);        # you can also remove an element from the parent form type        # $builder->remove('some_field');        $builder->add('number', 'integer');    }    public function setDefaultOptions(OptionsResolverInterface $resolver)    {        $resolver->setDefaults(array(            'data_class' => 'Your\Bundle\Entity\YourEntity',        ));    }    public function getName()    {        return 'extend';    }}

The BaseType will display a name field and an add submit button. The ExtendType will display a name field, an add submit button and a number field.

You can do this with the getParent() function.

<?phpnamespace Your\Bundle\Form;use Symfony\Component\Form\AbstractType;use Symfony\Component\Form\FormBuilderInterface;class ChildType extends AbstractType{    public function buildForm(FormBuilderInterface $builder, array $options)    {        // $builder->remove('field');        // $builder->add('field);    }    public function getParent()    {        return ParentType::class;    }}