In the example below, how would I get the value entered into $form['element'] that triggers the AHAH callback, without actually submitting the form?


function test_menu() {
  $items['test'] = array(
    'title' => 'Test',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('test_form'),
    'access arguments' => array('access content')
  );
  $items['test/message_js'] = array(
    'page callback' => 'test_message_js',
    'type' => MENU_CALLBACK,
    'access arguments' => array('access content')
  );

  return $items;
}

function test_form() {
  $form['element'] = array(
    '#title' => t('Text Entry'),
    '#type' => 'textfield',
    '#maxlength' => 4,
    '#required' => TRUE,
    '#ahah' => array(
      'event' => 'blur',
      'path' => 'test/message_js',
      'wrapper' => 'target',
      'effect' => 'fade',
    ),
  );
  $form['target'] = array(
    '#type' => 'markup',
    '#prefix' => '
', '#value' => t('Enter something above to see a dropdown list here.'), '#suffix' => '
', ); $form['submit'] = array( '#type' => 'submit', '#value' => t('Submit'), ); return $form; } function test_message_js() { // How do I get access to $form['element'] value from here, without requiring a form submit?! // do something with value of $form['element'] $form_portion['dropdown'] = array( '#title' => t('Drop-down list'), '#type' => 'select', '#maxlength' => 50, '#options' => array( 'One', 'Two', 'Three', 'Four', ), '#required' => TRUE, ); $output = drupal_render($form_portion); drupal_json(array('status' => TRUE, 'data' => $output)); }

Comments

sam.clayton@gmail.com’s picture

I'd like to know the same thing. I'll be working on something related today.

maozet’s picture

you should try $_POST

Jaypan’s picture

I'm still a fair newb at ahah, but I believe that you aren't supposed to use $_POST values as it is insecure (drupal 6).

I think that what you want to do is change this:

function test_form() {

to this

function test_form(&$form_state) {

Which gives you access to the values that were entered before the ahah handler was called in $form_state. You can then use conditionals based on $form_state to build your form. For example:

if(!isset($form_state['something']))
{
  // output original form element
}
else
{
  // output new form element
}

The Drupal organization has shut down discussion on improvement of the forums: https://www.drupal.org/node/2536122

It's time to start a new forum somewhere else. The Drupal organization does not care about the forums.


asmdec’s picture

You could get the form from the cache:

function test_form() {
  $form = array(
    '#cache' => TRUE,
  );
  // ... the rest of original code
}

function test_message_js() {

  // How do I get access to $form['element'] value from here, without requiring a form submit?!

  $form_state = array('storage' => NULL, 'submitted' => FALSE);
  $form_build_id = $_POST['form_build_id'];
  // Get the form from the cache.
  $form = form_get_cache($form_build_id, $form_state);

  // do something with value of $form['element']
  // ... the rest of original code
}

For more information see Doing AHAH Correctly in Drupal 6 here http://drupal.org/node/331941.

KeyboardCowboy’s picture

I'm not sure if this is any more secure than calling the $_POST variable directly, but it follows the tutorial in [#331941]. You could call this subroutine from within your AHAH callback function to get an array of the data entered into your form without submitting the form.

function MODULE_get_ahah_form_data() {
  $form_state = array('storage' => NULL, 'submitted' => FALSE);
  $form_build_id = $_POST['form_build_id'];

  // Get the form from the cache.
  $form = form_get_cache($form_build_id, $form_state);

  // Preparing for #5.
  $args = $form['#parameters'];
  $form_id = array_shift($args);
  $form_state['post'] = $form['#post'] = $_POST;
  $form['#programmed'] = $form['#redirect'] = FALSE;

  // Step #5.
  $form = drupal_rebuild_form($form_id, $form_state, $args, $form_build_id);

  return $form['#parameters'][1]['post'];
}

--------
Chris (KeyboardCowboy) - @ChrisAlbrecht