Drupal 7 ajax框架的例子不工作

Question

我想在用户配置文件页面添加一个表单。所以我创建了user-profile .tpl.php。在该模板中，我只是从ajax框架中复制了用于测试的示例。以下是完整的代码:

function ajax_example_simplest($form, &$form_state) {
 $form = array();
 $form['changethis'] = array(
'#type' => 'select',
'#options' => array(
  'one' => 'one',
  'two' => 'two',
  'three' => 'three',
),
'#ajax' => array(
  'callback' => 'ajax_example_simplest_callback',
  'wrapper' => 'replace_textfield_div',
 ),
);

$form['replace_textfield'] = array(
'#type' => 'textfield',
'#title' => t("The default value will be changed"),
'#description' => t("Say something about why you chose") . "'" .
  (!empty($form_state['values']['changethis'])
  ? $form_state['values']['changethis'] : t("Not changed yet")) . "'",
'#prefix' => '<div id="replace_textfield_div">',
'#suffix' => '</div>',
);
  return $form;
 }
function ajax_example_simplest_callback($form, $form_state) {
 return $form['replace_textfield'];
}

我现在很困惑。在我点击复选框后，文本框中没有任何变化。我的jquery版本是1.9。还有其他限制吗?

Answer 1

改变是在描述，而不是在文本字段(我做了同样的错误，你做了)。然而，我已经更新了代码，所以它也显示了"文本字段"的值。

function ajax_example_simplest($form, &$form_state)
{
    $form = array();
    $form['changethis'] = array(
        '#type' => 'select',
        '#options' => array(
            'one'   => 'one',
            'two'   => 'two',
            'three' => 'three',
        ),
        '#ajax' => array(
            'callback' => 'ajax_example_simplest_callback2',
            'wrapper'  => 'replace_textfield_div',
        ),
    );
    $number = (!empty($form_state['values']['changethis']) ? $form_state['values']['changethis'] : t("Not changed yet"));
    $form['replace_textfield'] = array(
        '#type'        => 'textfield',
        '#title'       => t("The default value will be changed"),
        // Not that value was changed in the description
        '#description' => t("Say something about why you chose") . " '" . $number . "'",
        // Also add next line if you want to see it in the text box
        '#value'       => $number,
        '#prefix'      => '<div id="replace_textfield_div">',
        '#suffix'      => '</div>',
    );
    return $form;
}
function ajax_example_simplest_callback2($form, $form_state) {
    return $form['replace_textfield'];
}