I want to create an auto-complete form in my custom module that will be loaded in a block. Drupal doesn't seem to be loading the necessary Javascript libraries to work properly. How do I know what needs to be loaded and how/where do I tell Drupal to load these libraries?


function my_module_block_view($delta = '') {
    //The $delta parameter tells us which block is being reqested.
    switch ($delta) {
        case 'my_module_my_block':
            $block['subject'] = t('Block Subject');
            $block['content'] = drupal_get_form('my_module_my_form');

    return $block;

Form code:

function my_module_my_form($form, &$form_state) {   
    $form = array();

    $form['term'] = array(
        '#type' => 'textfield',
        '#autocomplete_path' => 'my-module-autocomplete'

    $form['submit'] = array(
    '#type' => 'submit',
    '#value' => 'Add',

    return $form;   

The form loads, the field is there, but auto-complete isn't working :(

If I call the my-module-autocomplete path I do get a valid response back when compared with a Content Type edit form. The ajax spinner in the input field never appears so the ajax isn't being called.

  • Does it have something to do with loading the form in a block? Jan 19, 2012 at 18:44

2 Answers 2


See the examples module for a straight forward AJAX Example.

  • I looked in the code, but didn't see any drupal_add_x calls or any includes...I assume Drupal would add the necessary libraries while it was building the blocks/pages?. Jan 19, 2012 at 18:23

Genuinely non-trivial, so here are some links:

Drupal AJAX API. Alternately, drupal_add_js()

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