fail to render checkboxes in ahah callback

I am having this trouble also, it works fine if I add just a text field both the label and textfield show... it's jsut for checkboxes the label appears but no checkboxes are present. I'm using the official AHAH guide from http://drupal.org/node/331941.

Would be nice to get someone's comment on this as I'm sure more people will want to know (and this is one of the search results from this forum) - I read another post /patch about not being able to put AHAH events to checkboxes, so I updated to 6.10 just in case but I'm still getting the same issue.

Any help please? (I've learnt so much myself about Drupal but I'm inclined to think this is a bug / expected functionality - if needs be I'll be adding my own checkboxes patch for this - but would like to get someone else's comments first)

Hi,

I was just about to raise a new issue. so I'll quickly update this post.

I got around the "checkboxes" issue by creating a function that returned an array of "checkbox" type (not checkboxES) and it works perfectly (in fact it was a good way to split my shown and hidden checkboxes fieldsets which are based on admin settings for the module)

I'm seeing this same issue on 6.12. Label and description are shown, but no actual checkboxes. Returning text-field form elements from the same callback works fine.

Is this an issue with drupal_render?

function example_ahah_callback() {
  $form_state = array('storage' => NULL, 'submitted' => FALSE, 'rebuild' => TRUE);
  $form_build_id = $_POST['form_build_id'];
  
  $form = form_get_cache($form_build_id, $form_state);
  
  $args = $form['#parameters'];
  $form_id = array_shift($args);
  $form_state['post'] = $form['#post'] = $_POST;
  $form['#programmed'] = $form['#redirect'] = FALSE;
  
  drupal_process_form($form_id, $form, $form_state);

  $form = drupal_rebuild_form($form_id, $form_state, $args, $form_build_id);

  $options = array(
    'Micro'   => t('Micro'), 
    'Small'   => t('Small'), 
    'Medium'  => t('Medium')
  );

  $form['image_size'] = array(
    '#type'          => 'checkboxes',
    '#title'         => t('Thumbnail size'),
    '#default_value' => variable_get('example_image_size', 'Small'),
    '#options'       => $options,
    '#description'   => t('Select the size of the image to include.'),
    '#tree'          => TRUE
  );

  $size_choice_form = $form['image_size'];
  $output = theme('status_messages') . drupal_render($size_choice_form);
  
  drupal_json(array('status' => TRUE, 'data' => $output));

}

I, too have been having the same issue. In my tests I have found that the only FAPI types that do not render properly are "radios" and "checkboxes".

I read above about creating am array of checkbox types, but for my current project that is not a feasable solution.

I'm having the same problem with inserting a checkboxes form-element with a ahah-callback.

I thought about the mentioned array solution before. But I just wanted to search for a perfect solution. Actually there's no bug fix available for this - and I'm just not that into the whole AHAH topic so that I could search for the bug and fix it. Therefore I'm waiting for a clever person that knows how to handle that one!

I called the form_builder function before rendering the checkboxes:

http://api.drupal.org/api/drupal/includes--form.inc/function/form_builder/6

function merci_staff_update_groups() {
  $form_state = array('storage' => NULL, 'submitted' => FALSE);
  $form_build_id = $_POST['form_build_id'];
  $form = form_get_cache($form_build_id, $form_state);
  $args = $form['#parameters'];
  $form_id = array_shift($args);
  $form_state['post'] = $form['#post'] = $_POST;

  global $user;
  $current_user = $user;
  $user = user_load(array('name' => $form['#post']['name']));
  og_form_add_og_audience($form,$form_state);
  $user = $current_user;

  $form = form_builder($form_id, $form, &$form_state) ;

  // This section prepares the actual output that will be returned to the
  // browser.
  $selected_portion = $form['og_nodeapi']['visible']['og_groups'];
  
  // To avoid doubling-up the wrapper, we have to remove it here.
  unset($selected_portion['#prefix'], $selected_portion['#suffix']);

  $output = drupal_render($selected_portion);

 // Output the results and exit.
  print drupal_json(array('status' => TRUE, 'data' => $output));
  exit();
}