We know how to replace a field using #ajax in a form. Can we update multiple fields using #ajax in a form? Yes, we can update multiple fields using #ajax in the Drupal 7. We can achieve it using ajax_command_replace() in Drupal 7. For more details about ajax commands on Drupal 7, please visit https://api.drupal.org/api/drupal/7.x/search/ajax_command.
Consider the following example. In this example, I've created a form with fields First, Second & Third name. I tried to update the Second & Third name fields when focus out on the First name field.
Update fields using #ajax in a Drupal form:
Consider the following example. In this example, I've created a form with fields First, Second & Third name. I tried to update the Second & Third name fields when focus out on the First name field.
/**
* Implments hook_form()
*/
function phponwebsites_ajax_form($form, &$form_state) {
$form['firstname'] = array(
'#title' => t('First name'),
'#type' => 'textfield',
'#ajax' => array(
'callback' => '_generate_textfield',
'wrapper' => 'copied-text-field',
)
);
$form['secondname'] = array(
'#title' => t('Second name'),
'#type' => 'textfield',
'#prefix' => '<div id="copied-secondname">',
'#suffix' => '</div>',
);
$form['thirdname'] = array(
'#title' => t('Third name'),
'#type' => 'textfield',
'#prefix' => '<div id="copied-thirdname">',
'#suffix' => '</div>',
);
$form['submit'] = array(
'#type' => 'submit',
'#value' => 'Submit'
);
return $form;
}
function _generate_textfield($form, &$form_state) {
if (!empty($form_state['values']['firstname'])) {
$form['secondname']['#value'] = $form_state['values']['firstname'];
$form['thirdname']['#value'] = $form_state['values']['firstname'];
}
$commands = array();
$commands[] = ajax_command_replace('#copied-secondname', drupal_render($form['secondname']));
$commands[] = ajax_command_replace('#copied-thirdname', drupal_render($form['thirdname']));
return array('#type' => 'ajax', '#commands' => $commands);
}
When you tried to execute the above codes, it'll populate the same name on the other 2 fields. It looks likes the below image:
Now I hope you know how to populate multiple fields using #ajax in Drupal 7 forms.
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