Symfony2 form type entity add extra option

Question

I have the following Symfony form field, it's a drop down that loads from an entity:

->add('measureunit', 'entity', array('label' => 'Measure Unit',
            'class' => 'TeamERPBaseBundle:MeasureUnit',
            'expanded' => false, 'empty_value' => '',
            'multiple' => false, 'property' => 'abreviation'
        ))

As you can see I have added 'empty_value' => '' and everything works fine. Now, what I want is to have an extra option at the end to add a let say new measure unit. In other words the dropdown should display all the content of my entity, the empty value and other extra option called new measure unit or what ever I want to call it. Is it possible?

Edit: The whole form type file has this:

<?php
namespace TeamERP\StoresBundle\Form\Type;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
class ProductType  extends AbstractType 
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
        ->add('name', 'text', array('label'=>'Product name', 'required' => true,
        'attr' => array('class' => 'form-control')))
        ->add('code', 'text', array('label'=>'Code', 'required' => false,
        'attr' => array('class' => 'form-control')))
        ->add('description', 'text', array('label'=>'Description', 'required' => false,
        'attr' => array('class' => 'form-control')))
        ->add('cost', 'money', array('label'=>'Cost', 'divisor' => 100, 'currency' => 'BWP'))
        ->add('category', new CategoryType(), array('required' => false))
        ->add('measureunit', 'entity', array('label' => 'Measure Unit',
            'class' => 'TeamERPBaseBundle:MeasureUnit',
            'expanded' => false, 'placeholder' => '',
            'multiple' => false, 'property' => 'abreviation'
        ))
        ->add('qtyToPurchase', 'number', array('label'=>'Quantity to purchase', 'required' => false,
        'attr' => array('class' => 'form-control')))
        ->add('reorderPoint', 'number', array('label'=>'Reorder point', 'required' => false,
        'attr' => array('class' => 'form-control')))
        ->add('qtyOnSalesOrder', 'number', array('label'=>'Quantity on sales order', 'required' => false,
        'attr' => array('class' => 'form-control')));
    }
public function getName()
    {
        return 'product';
    }
public function finishView(FormView $view, FormInterface $form, array $options)
    {
        $new_choice = new ChoiceView(array(), 'add', 'add new'); // <- new option
        $view->children['measureunit']->vars['choices'][] = $new_choice;//<- adding the new option 
    }
}

Error: Compile Error: Declaration of TeamERP\StoresBundle\Form\Type\ProductType::finishView() must be compatible with Symfony\Component\Form\FormTypeInterface::finishView(Symfony\Component\Form\FormView $view, Symfony\Component\Form\FormInterface $form, array $options)

Edit2 Working form file:

<?php
namespace TeamERP\StoresBundle\Form\Type;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Form\FormView; 
use Symfony\Component\Form\FormInterface;
use Symfony\Component\Form\Extension\Core\View\ChoiceView;
class ProductType  extends AbstractType 
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
        ->add('name', 'text', array('label'=>'Product name', 'required' => true,
        'attr' => array('class' => 'form-control')))
        ->add('code', 'text', array('label'=>'Code', 'required' => false,
        'attr' => array('class' => 'form-control')))
        ->add('description', 'text', array('label'=>'Description', 'required' => false,
        'attr' => array('class' => 'form-control')))
        ->add('cost', 'money', array('label'=>'Cost', 'divisor' => 100, 'currency' => 'BWP'))
        ->add('category', new CategoryType(), array('required' => false))
        ->add('measureunit', 'entity', array('label' => 'Measure Unit',
            'class' => 'TeamERPBaseBundle:MeasureUnit',
            'expanded' => false, 'placeholder' => '',
            'multiple' => false, 'property' => 'abreviation'
        ))
        ->add('qtyToPurchase', 'number', array('label'=>'Quantity to purchase', 'required' => false,
        'attr' => array('class' => 'form-control')))
        ->add('reorderPoint', 'number', array('label'=>'Reorder point', 'required' => false,
        'attr' => array('class' => 'form-control')))
        ->add('qtyOnSalesOrder', 'number', array('label'=>'Quantity on sales order', 'required' => false,
        'attr' => array('class' => 'form-control')));
    }
public function getName()
    {
        return 'product';
    }
public function finishView(FormView $view, FormInterface $form, array $options)
    {
        $new_choice = new ChoiceView(array(), 'add', 'add new'); // <- new option
        $view->children['measureunit']->vars['choices'][] = $new_choice;//<- adding the new option 
    }
}

Darryl Hein · Accepted Answer · 2017-09-15 18:33:44Z

23

In your form type override the function finishView:

public function buildForm(FormbuilderInterface $builder, array $options){
    $builder->add('measureunit', EntityType::class, array(
        'label' => 'Measure Unit',
        'class' => 'TeamERPBaseBundle:MeasureUnit',
        'expanded' => false, 
        'empty_value' => '',
        'multiple' => false, 
        'property' => 'abbreviation'
    ));
}

public function finishView(FormView $view, FormInterface $form, array $options)
{
    $newChoice = new ChoiceView(array(), 'add', 'Add New'); // <- new option
    $view->children['measureunit']->vars['choices'][] = $newChoice;//<- adding the new option 
}

You will get a new option 'add new' with value 'add' to the bottom of the field.

edited Sep 15, 2017 at 18:33

Darryl Hein

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answered May 3, 2015 at 18:23

zizoujab

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5 Comments

wti Over a year ago

Thanks, I get this error:

Compile Error: Declaration of TeamERP\StoresBundle\Form\Type\ProductType::finishView() must be compatible with Symfony\Component\Form\FormTypeInterface::finishView(Symfony\Component\Form\FormView $view, Symfony\Component\Form\FormInterface $form, array $options)

zizoujab Over a year ago

I think your are missing to import the FormView and FormInterface components , try adding those two lines to the use list use Symfony\Component\Form\FormView; use Symfony\Component\Form\FormInterface;

wti Over a year ago

Thank you it worked, I just had to add this as well: use Symfony\Component\Form\Extension\Core\View\ChoiceView;

Darryl Hein Over a year ago

Of note: as this value is not part of the initial list (will produce a validation error), you'll need to either (1) "deal" with it on JS so the server never sees it, or (2) use a data transformer to "deal" with.

CappY Over a year ago

@DarrylHein The easiest way is to deal with listener.

CappY · Accepted Answer · 2018-10-30 19:55:09Z

3

In addition to accepted answer:

If you choose the added option you will get validation error (because it's not valid entity), the following snippet can be used to overcome this error:

$builder->addEventListener(
        FormEvents::PRE_SUBMIT,
        function (FormEvent $event) {
            if ($event->getData() === 'add') {
                $event->setData(null);
            }
        }
    );

Then you can check if selected option is NULL, if it's => take value from additional input field.

answered Oct 30, 2018 at 19:55

CappY

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2 Comments

alakin_11 Over a year ago

Can you explain this comment further? "Then you can check if selected option is NULL, if it's => take value from additional input field." Thanks!

CappY Over a year ago

What I mean is => If you select that additional option you will receive validation error from Symfony itself -> that's why if selected value is 'add' - we replace it by NULL - so symfony will not throw validation error. Then you can check - If value of field is NULL -> then do your logic.

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