FormEvents

The PRE_SUBMIT event is dispatched at the beginning of the Form::submit() method.

It can be used to: - Change data from the request, before submitting the data to the form. - Add or remove form fields, before submitting the data to the form. The event listener method receives a Symfony\Component\Form\FormEvent instance.

The SUBMIT event is dispatched just before the Form::submit() method transforms back the normalized data to the model and view data.

It can be used to change data from the normalized representation of the data. The event listener method receives a Symfony\Component\Form\FormEvent instance.

The FormEvents::POST_SUBMIT event is dispatched after the Form::submit() once the model and view data have been denormalized.

It can be used to fetch data after denormalization. The event listener method receives a Symfony\Component\Form\FormEvent instance.

The FormEvents::PRESETDATA event is dispatched at the beginning of the Form::setData() method.

It can be used to: - Modify the data given during pre-population; - Modify a form depending on the pre-populated data (adding or removing fields dynamically). The event listener method receives a Symfony\Component\Form\FormEvent instance.

The FormEvents::POSTSETDATA event is dispatched at the end of the Form::setData() method.

This event is mostly here for reading data after having pre-populated the form. The event listener method receives a Symfony\Component\Form\FormEvent instance.