How to set default value for form field in Symfony2?

Question

Is there an easy way to set a default value for text form field?

Answer 1

Often, for init default values of form i use fixtures. Of cause this way is not easiest, but very comfortable.

Example:

class LoadSurgeonPlanData implements FixtureInterface
{
    public function load(ObjectManager $manager)
    {
        $surgeonPlan = new SurgeonPlan();

        $surgeonPlan->setName('Free trial');
        $surgeonPlan->setPrice(0);
        $surgeonPlan->setDelayWorkHours(0);
        $surgeonPlan->setSlug('free');

        $manager->persist($surgeonPlan);
        $manager->flush();        
    }   
}

Yet, symfony type field have the option data.

Example

$builder->add('token', 'hidden', array(
    'data' => 'abcdef',
));

Answer 2

If that field is bound to an entity (is a property of that entity) you can just set a default value for it.

An example:

public function getMyField() {
    if (is_null($this->MyField)) {
        $this->setMyField('my default value');
    }
    return $this->MyField;
}

Answer 3

As Brian asked:

empty_data appears to only set the field to 1 when it is submitted with no value. What about when you want the form to default to displaying 1 in the input when no value is present?

you can set the default value with empty_value

$builder->add('myField', 'number', ['empty_value' => 'Default value'])

Answer 4

->addEventListener(FormEvents::PRE_SET_DATA, function (FormEvent $event) {
     $form = $event->getForm(); 
     $data = $event->getData(); 

     if ($data == null) {
         $form->add('position', IntegerType::class, array('data' => 0));
     }

});

Answer 5

I solved this problem, by adding value in attr:

->add('projectDeliveringInDays', null, [
    'attr' => [
          'min'=>'1',
          'value'=>'1'
          ]
     ])

Answer 6

If you need to set default value and your form relates to the entity, then you should use following approach:

// buildForm() method
public function buildForm(FormBuilderInterface $builder, array $options) {
    $builder
    ...
    ->add(
        'myField',
        'text',
        array(
            'data' => isset($options['data']) ? $options['data']->getMyField() : 'my default value'
        )
    );
}

Otherwise, myField always will be set to default value, instead of getting value from entity.