June 8, 2016

How to restrict modification to selected properties of an entity while persisting?

Let’s suppose we have an entity class and a generic FormType corresponding to the entity

class Entry {
    protected $start_time;
    protected $end_time;
    protected $confirmed; // Boolean

    // ... Other fields and getters and setters

On the CRUD of this entity, you might not want to allow any modification on start_time or end_time if the entity has been confirmed or in the above case when $confirmed === true

Here are couple of ways this can be solved:

  1. Using the EntityManager you can retrieve original data of the entity. $em->getUnitOfWork()->getOriginalEntityData($entity) returns an array with old data of an entity which can be used to reset the data.

    if($form->isSubmitted() && $editForm->isValid()) {
        // The form was submitted
        if($confirmed === true) { // if the entity was confirmed previously
            $oldData = $em->getUnitOfWork()->getOriginalEntityData($entity);
        // After this you can happily persist the data
  2. Using Form Events

    The following is a Symfony 3 Solution, try this solution for Symfony 2.

    class EntityType extends AbstractType
        public function buildForm(FormBuilderInterface $builder, array $options)
            // ....
            // ....
            // Your form fields
            $builder->addEventListener(FormEvents::POST_SET_DATA, array($this, 'onPreSetData'));
        public function onPreSetData(FormEvent $event) {
            /** @var YourEntity $entity */
            $entity = $event->getData();
            $form = $event->getForm();
            if($entity instanceof YourEntity) {
                if ($entity->getTimesheetEntry()->getTimeApproved() === true) {
                    $config = $form->get('start_time')->getConfig();
                    $options = $config->getOptions();
                    $options['disabled'] = true;
                    $form->add('start_time', get_class($config->getType()->getInnerType()), $options);
                    $config = $form->get('end_time')->getConfig();
                    $options = $config->getOptions();
                    $options['disabled'] = true;
                    $form->add('end_time', get_class($config->getType()->getInnerType()), $options);
March 31, 2016

How to make symfony forms support datetime-local input type?

Starx’s Question:

Most of the browsers are dropping support for datetime and also datetime-local as a valid input type. As of the time of writing this question, there are more support for support for datetime-local than datetime(which is almost non-existent).

If you building forms using Symfony’s form builder, it supports datetime but not datetime-local. So how would you make symfony form builder accept datetime-local input type and keep the rest of the functionality of the input type same?

One way this problem can be solved is, if we can change the text of input type to say datetime-local which can be done by overwriting the DateTimeType and using that.


namespace AppBundleComponentFormExtensionCoreType;

use SymfonyComponentFormFormInterface;
use SymfonyComponentFormFormView;

class DateTimeType extends SymfonyComponentFormExtensionCoreTypeDateTimeType
     * {@inheritdoc}
    public function buildView(FormView $view, FormInterface $form, array $options)
        $view->vars['widget'] = $options['widget'];

        // Change the input to a HTML5 datetime input if
        //  * the widget is set to "single_text"
        //  * the format matches the one expected by HTML5
        //  * the html5 is set to true
        if ($options['html5'] && 'single_text' === $options['widget'] && self::HTML5_FORMAT === $options['format']) {
            $view->vars['type'] = 'datetime-local';


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