Drupal 7 - node Form template is not used

Question

I have a Problem with one node type and it's form. I want to alter it with an template file. I already did this with another node type on my drupal site and this worked, but it doesn't work for this second type.

So (as I did for the other node type) I placed this hook in my module:

function MY_MODULE_theme($existing, $type, $theme, $path) {
  return array(
    'FORM_ID' => array(
      'arguments' => array(
          'form' => NULL,
      ),
      'render element' => 'form',
      'template' => 'TYPE-node-form',
      'path' => drupal_get_path('module', 'MY_MODULE'),
    ),

  );
}

And also declared this function (in my module):

function template_preprocess_TYPE_node_form(&$variables) {
   /* Some hide(elements) and stuff */
}

And of course, I created the file TYPE-node-form.tpl.php in the module directory

/* Something */
TEST
    <?php if($form): ?>
      <?php print drupal_render_children($form); ?>
    <?php endif; ?>
/* Something more */

But it does not load this template ( I cannot see TEST and the other things). Also after multiply times of clearing cache and refreshing.

With DisplaySuite I was able to set a template in the backend (Administration » Structure » Content types » TYPE » Manage fields). But I want to have my own template file (and also not located in the sites/all/modules/ds/layout/.. folder). Deactivating DisplaySuite also does not do the trick. I also looked tried to place the MY_THEME_theme() code into the template.php file of the administrator theme, but it also did not work.

Any suggestions? What can I do? Is there a way to find out which template is used or where it is overwritten? I have read that Themes overwrite modules templates declaration?!

Answer 1

If you are using D7, hook_theme implementations do not have 'arguments' key, but 'variables'.

Also in this case remove the 'arguments' or 'variables' key in order for the 'render element' to work. Hope this helps.

Final code:

function MY_MODULE_theme($existing, $type, $theme, $path) {
   return array(
     'FORM_ID' => array(
        'render element' => 'form',
        'template' => 'TYPE-node-form',
        'path' => drupal_get_path('module', 'MY_MODULE'),
     ),
   );
}