Drupal的AHAH，動態表單擴張

形式Drupal的AHAH，動態表單擴張

$form['animal'] = array(
    '#type' => 'select', 
    '#title' => t('Animal'), 
    '#options' => load_animals(), 
    '#ahah' => array(
     'event' => 'change', 
     'path' => 'path/to/ajax/service', 
     'method' => 'replace', 
     'effect' => 'fade', 
     'wrapper' => 'breed-wrapper', 
    ), 
); 
... 
$form['breed'] = array(
    '#type'  => 'select', 
    '#title' => t('Breeds'), 
    '#options' => array('Select animal to load breed'), 
    '#prefix' => '<div id="breed-wrapper">', 
    '#suffix' => '</div>', 
);

而且下面是AHAH回調處理

$post = $_POST; 
$form_state = array('storage' => NULL, 'submitted' => FALSE); 
$form_build_id = $post['form_build_id']; 
$form = form_get_cache($form_build_id, $form_state); 
$args = $form['#parameters']; 
$form_id = array_shift($args); 
$form['#redirect'] = FALSE; 
$form['#post'] = $post; 
$form['#programmed'] = FALSE; 
$form_state['post'] = $post; 
drupal_process_form($form_id, $form, $form_state); 
// New form elements 
$breed_form = $form['breed']; 
$options = load_breeds((int)$post['animal']); 
$breed_form['#options'] = $options; 
$form['breed'] = $breed_form; 
form_set_cache($form_build_id, $form, $form_state); 
$form = drupal_rebuild_form($form_id, $form_state, $args, $form_build_id); 

unset($breed_form['#prefix'], $breed_form['#suffix']); 
// Render the new output. 
$output .= drupal_render($breed_form); 

drupal_json(array('status' => TRUE, 'data' => $output));

默認形式提交處理

function default_form_submit(&$form, $form_state){ 
    $clicked_button = $form_state['clicked_button']['#value']; 
    $values = $form_state['values']; 
    if($clicked_button == $values['submit']){ 
     unset($values['op'], $values['submit'], $values['form_build_id'], 
      $values['form_token'], $values['form_id']); 
     .... 
     drupal_goto($_REQUEST['q'], $query); 
    } 
}

當我終於提交以正常發佈方式形成的有效證明n錯誤報告爲An illegal choice has been detected.我是否正確使用form_set_cache（）？
在AHAH帖子上，默認表單提交處理程序也被調用。由於此處理程序包含重定向邏輯，因此AHAH請求已摺疊。如何繞過它即使我正在做click_button驗證？

來源

2011-04-05 Shoaib Nawaz

我不太確定，但我認爲這篇文章會幫助你很多。 http://www.mindyourcode.com/php/adding-dynamic-form-elements-using-ahah-in-apply-for-for-role-module/ – Mashhadi 2013-03-07 12:46:50

我想爲你的最後一個問題，使用需要設置$form_state['ahah_submission'] = TRUE。

來源

2011-12-30 17:28:02

Drupal的AHAH，動態表單擴張

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