Question

I have a task to make some of the checkboxes in a form choice field disabled, and some not. Is there an easy way to achieve that without rewriting choice field layouts?

Answer 1

You can set on your choice field the disabled state :

$builder->add('myChoice', 'choice', array('attr'=>array('disabled'=>'disabled')));

Or you could use an EventSubscriber to listen on PostSetData event if you have some logic needed to set the disabled state.
Check cookbook dynamic form generation for implementation details.