How to use the ChoiceListInterface in Symfony 2?

Question

I'd like to display a dynamic list of checkboxes in a form.

So far, I built a form embedding a static list of checkboxes, and I created a Tag entity for different values in different languages and populated the database. I'd like to replace the static checkboxes by a dynamic list based on the Tag entity.

The documentation says I should use the ChoiceListInterface. But it is really poorly documented. Would you have an example or a global logic explanation to help me ?

Answer 1

You can extend LazyChoiceList abstract class and implement loadChoiceList() method, create a service of it, inject it to the form and set it as choice_list option.