class FormEvents
To learn more about how form events work check the documentation entry at {@link https://symfony.com/doc/any/components/form/form_events.html}.
To learn how to dynamically modify forms using events check the cookbook entry at {@link https://symfony.com/doc/any/cookbook/form/dynamicformmodification.html}.
Constants
| PRE_SUBMIT | 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. |
| SUBMIT | 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. |
| POST_SUBMIT | 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. |
| PRE_SET_DATA | 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). |
| POST_SET_DATA | 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. |
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