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I am trying to use drupal ajax to test if an email address from the form it is in my database. For that i have altered the form and added the following line to the element:

   $form['field_radio']['#ajax'] = array
    (
       'callback' => '_get_member',
       'progress' => array('type' => 'throbber', 'message' => '')
    );

and the callback function:

function _get_member($form, $form_state){

     $sid = $form_state['values']['details']['sid'];
    $commands[] = ajax_command_alert("Hello World");    

    return array(
    'type' => 'ajax',
    'commands' => $commands
  ); 
}

As you can see from the callback i just want to return an alert message but it does not work. The callback is called because i have tested using watchdog but the alert popup never fires. Why ?

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'wrapper' is a required key for #ajax on form elements, you're probably just missing that. From the docs

This property is required for using AJAX requests in on a form element

If you add the wrapper it should work:

$form['field_radio']['#ajax'] = array (
   'callback' => '_get_member',
   'progress' => array('type' => 'throbber', 'message' => ''),
   'wrapper' => 'some-element-id'
);
  • i have added the wrapper key but still the alert is not fired! Is there a way to grab variables from the result with javascript ? – Vlasin Jan 9 '13 at 11:07
  • In the ajax response i found the text : "command":"alert", "text":"Based on your email, you are not a Member yet!" – Vlasin Jan 9 '13 at 11:16

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