CakePHP：设置主页变量
将其添加到 app/controllers/pages_controller.php 内的 display 函数的末尾后，
// grab all message lists
$this->loadModel('MessageList');
$this->set('messageLists', $this->MessageList->find('all'));
我尝试在 app/views/pages/home 中访问它。 ctp 之类的
<?php
foreach($messageLists as $messageList) {
print_r($messageList);
}
?>
但我收到警告
Notice (8): Undefined variable: messageLists [APP\views\pages\home.ctp, line 9]
我的 app/config/routes.php 有：
/**
* Here, we are connecting '/' (base path) to controller called 'Pages',
* its action called 'display', and we pass a param to select the view file
* to use (in this case, /app/views/pages/home.ctp)...
*/
Router::connect('/', array('controller' => 'pages', 'action' => 'display', 'home'));
/**
* ...and connect the rest of 'Pages' controller's urls.
*/
Router::connect('/pages/*', array('controller' => 'pages', 'action' => 'display'));
我需要更改什么才能访问我的 $messageLists主页？谢谢！
After adding this to the end of my display function inside app/controllers/pages_controller.php,
// grab all message lists
$this->loadModel('MessageList');
$this->set('messageLists', $this->MessageList->find('all'));
I try to access it in app/views/pages/home.ctp like
<?php
foreach($messageLists as $messageList) {
print_r($messageList);
}
?>
But I get the warning
Notice (8): Undefined variable: messageLists [APP\views\pages\home.ctp, line 9]
My app/config/routes.php has:
/**
* Here, we are connecting '/' (base path) to controller called 'Pages',
* its action called 'display', and we pass a param to select the view file
* to use (in this case, /app/views/pages/home.ctp)...
*/
Router::connect('/', array('controller' => 'pages', 'action' => 'display', 'home'));
/**
* ...and connect the rest of 'Pages' controller's urls.
*/
Router::connect('/pages/*', array('controller' => 'pages', 'action' => 'display'));
What do I need to change so that I can access $messageLists in my home page? Thanks!
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在你的display()方法的最后？好吧，这不起作用，因为它在设置视图变量之前调用 render() 并在此渲染页面。因此，将 set() 调用移到 render() 调用之前。
还有一个进一步的提示：您的实现做得不是很好，除非您想在每个页面上引发额外的查询，甚至不需要显示消息。
看起来您是 CakePHP 初学者，所以我建议您在手册中查找 requestAction() 以及视图中的元素如何工作。这将允许您使用任何视图文件中的元素和请求操作（例如 Messages/getListForUser）来显示消息列表。
At the very end of your display() method? Well this won't work because its calling render() before and by this render the page before you set the view vars for it. So move your set() call before the render() call.
Also a further hint: Your implementation is not very well done except you want to cause additional queries on each page that does not even need to display the messages.
It looks like you're a CakePHP beginner so I suggest you to lookup requestAction() in the manual and how elements in the views work. This would allow you to display the list of messages using an element in any view file by using an element and a request action to for example Messages/getListForUser.
这应该有效。确保您在
$this->render()调用之前设置变量。渲染调用停止控制器代码的执行并将视图渲染到浏览器。因此，只需将 this: 移动到 $this->render() 调用之前，它就会起作用。
This should work. Make sure you're setting the variable before the
$this->render()call. It is the render call that stops execution of the controller code and renders the view to the browser. So just move this:to before the
$this->render()call and it will work.