Comment 1 for bug 612663

Yes, those are tricky cases, but it is not z3c.form's fault. You simply have to make your ``showApply()`` method smarter and take your additional condition into account. I have encountered these chicken-and-egg problems many times when writing forms.

In general, I write the condition against the model data not the request. If the model gets updated during the action, I commonly simply re-update the actions, which is allowed. In general, it is sometimes necessary to update widgets and actions multiple times during the update process. (This is a lot like needing to render LaTeX documents multiple times to get page references correctly.)