How to render a checkbox that is checked by default with the symfony2 Form Builder?

Question

I have not found any easy way to accomplish to simply check a Checkbox by default. That can not be that hard, so what am i missing?

Answer 1

As per documentation: http://symfony.com/doc/current/reference/forms/types/checkbox.html#value

To make a checkbox or radio button checked by default, use the data option.