为什么 Drupal AHAH 表单不能在块内工作?
我正在尝试让 AJAX 提交的 (AHAH) 表单能够显示在侧边栏的块中。出于测试目的,我使用 Pro Drupal Development 书中名为“Poof”的示例模块:http://books.google.com/ books?id=VmZrdGuBZCMC&lpg=PA269&ots=cnHiYG6kXn&dq=pro%20drupal%20development%20poof&pg=PA269#v=onepage&q=pro%20drupal%20development%20poof&f=false
到目前为止,我在示例中添加的唯一内容是 hook_block 的实现,如下所示:
function poof_block($op = 'list', $delta = 0, $edit = array()) {
switch ($op) {
case 'list':
$blocks[0]['info'] = t('poof');
return $blocks;
case 'view':
$block['content'] = drupal_get_form('poof_form');
return $block;
}
}
AJAX 模块在其自己的页面 (mydrupalsite.com/poof) 上显示时工作正常,但当我使用 module_invoke(' 调用表单时poof', 'block' ...) 在模板文件中,表单正常提交(无 AJAX)并刷新页面。
我找不到为什么会发生这种情况的明确答案,尽管我发现了一些与此无关的东西,表明 AHAH 可能在区块内不起作用。如果是这样,为什么?或者更好的是,有什么解决方法。我是否必须将其放在自己的空白页上并通过 iframe 将其引入?这听起来不必要地混乱。
更新: 这里有更多代码供参考(同样,它来自 Pro Drupal 书)
function poof_form() {
$form['target'] = array(
'#type' => 'markup',
'#prefix' => '<div id="target">',
'#value' => t('Click the button below.'),
'#suffix' => '</div>',
);
$form['submit'] = array(
'#type' => 'button',
'#value' => t('Click Me'),
'#submit'=>false,
'#ahah' => array(
'event' => 'click',
'path' => 'poof/message_js',
'wrapper' => 'target',
'effect' => 'fade',
),
);
return $form;
}
function poof_message_js() {
$output = t('POOF!');
drupal_json(array('status' => TRUE, 'data' => $output));
}
I'm trying to get an AJAX-submitted (AHAH) form working to display in a block on the sidebar. For testing purposes, I'm using an example module called "Poof" from the Pro Drupal Development book: http://books.google.com/books?id=VmZrdGuBZCMC&lpg=PA269&ots=cnHiYG6kXn&dq=pro%20drupal%20development%20poof&pg=PA269#v=onepage&q=pro%20drupal%20development%20poof&f=false
The only thing I've added to the example so far is an implementation of hook_block, which looks like this:
function poof_block($op = 'list', $delta = 0, $edit = array()) {
switch ($op) {
case 'list':
$blocks[0]['info'] = t('poof');
return $blocks;
case 'view':
$block['content'] = drupal_get_form('poof_form');
return $block;
}
}
The AJAX module works fine when displaying on its own page (mydrupalsite.com/poof) but when I call the form with module_invoke('poof', 'block' ...) in a template file, the form submits as normal (sans AJAX) and refreshes the page.
I can't find a definitive answer for why this happens, though a found something tangentially related that suggests that maybe AHAH doesn't work within blocks. If that's so, why? Or better yet, what's a work-around. Do I have to put the on its own blank page and bring it in with an iframe? That sounds unnecessarily messy.
UPDATED:
Here's more code for reference (again, it's from the Pro Drupal book)
function poof_form() {
$form['target'] = array(
'#type' => 'markup',
'#prefix' => '<div id="target">',
'#value' => t('Click the button below.'),
'#suffix' => '</div>',
);
$form['submit'] = array(
'#type' => 'button',
'#value' => t('Click Me'),
'#submit'=>false,
'#ahah' => array(
'event' => 'click',
'path' => 'poof/message_js',
'wrapper' => 'target',
'effect' => 'fade',
),
);
return $form;
}
function poof_message_js() {
$output = t('POOF!');
drupal_json(array('status' => TRUE, 'data' => $output));
}
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尝试将
$blocks[0]['cache'] = BLOCK_NO_CACHE;
添加到您的 hook_block 实现中。
使用 ahah 渲染表单会导致调用 drupal_add_js 来添加 ahah javascript,但是当块的输出被缓存时,添加到页面的 javascript 却不会。
Try adding
$blocks[0]['cache'] = BLOCK_NO_CACHE;
to your hook_block implementation.
Rendering a form with ahah causes a call to drupal_add_js to add the ahah javascript, but while the output of the block is cached, the javascript that gets added to the page doesn't.