Skip validation for a form element in Drupal

// we have to get out of validation somehow
// we have to get out of validation for an associated group somehow


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Well, the nuclear option on case 'action_node_form': in my implementation of hook_form_alter works:

        $form['#validate'] = array();

Now is there a way to just skip, or preset, validation for one item in the form array?

drupal

ben-agaric: Is it possible to turn off validation of a specific form element with form_alter? (Override validation from another module.) In Drupal 5.

ben-agaric: Is there a way to turn off validation for a given form element? Drupal 5 and I've successfully merged two forms, so that you can create an organic group at the same time as the first post for that group ( http://dev.wsf2008.net/ ) but the only way I've been able to kill the "you must join a group" is with $form['#validate'] = array();
hunmonk: ben-agaric: you could try unsetting the validation handler, but that might also be overkill
[2:18pm] webchick left the chat room.
[2:19pm] dww: hunmonk: yeah, you most definitely bought yourself a hell of a lot more work, take it from me.
[2:19pm] ben-agaric: hunmonk: thanks, that's what my array() does I think, and yeah, I'd like it to do all the validation, except for one piece done by organic groups in nodeapi 'insert' -- if that provides another line of attack.

ben-agaric: just to report back to myself... validation can be successfully skipped by filling in dummy values... obvious, but organic groups was doing the validation in nodeapi and I wasn't sure what it corresponded to in the formapi... I think its funky 'og_groups_hidden' field
[2:38pm] ben-agaric: first post + organic group creation, in one form. With validation. Yay me.

Resolution

          // remove group choice, we'll pass this in directly
          // for reference: [og_nodeapi][visible][og_groups][#type] & [#value]
          unset($form['og_nodeapi']['visible']);
          // we have to get out of validation for an associated group somehow
          $form['og_nodeapi']['invisible']['og_groups'] = array(
            '#type' => 'value',
            '#value' => TRUE,
          );
          $form['og_nodeapi']['invisible']['og_groups_hidden'] = array(
            '#type' => 'value',
            '#value' => TRUE,
          );

I think only the second is absolutely needed, but better safe.

This is part of the conclusion to merging forms.