$ this->执行ajax调用后数据为空

I am implementing a function populatig a select box using data from another select box.

我正在使用另一个选择框中的数据实现一个选择框的功能。

//views/users/ajax.ctp
$.ajax({
        url: url,
        type: "GET",
        dataType: "html",
        data:"arr=" + result,
        success: function(data){
            document.getElementById(child).innerHTML = data;
        }
    });

As you can see from the code above the data passed by the call should be accessible in the getSectors() function under the data variable:

从上面的代码中可以看出,调用传递的数据应该可以在data变量下的getSectors()函数中访问:

//controllers/users_controller.php
function getSectors() {
    $this->set('data', $this->data);
    $this->render('/users/ajax_data');
}

In the corresponding view I try to see the content of the data passed:

在相应的视图中,我尝试查看传递的数据内容:

//views/users/ajax_data.ctp
<?php var_dump($data); ?>

The $data is null.

$ data为null。

Debugging that in Firebug shows that the call is invoked properly (status 200 ok) and that the XMLHttpRequest contains parameters and values.

在Firebug中进行调试显示调用正确调用(状态200 ok)并且XMLHttpRequest包含参数和值。

Do you have any suggestions what could be possibly wrong?

你有什么可能错的建议吗?

1 个解决方案

#1

In order for Cake to populate the $this->data variable, the data being send needs to follow the format data[Model][field], or at least be part of the data[..] array. If it's plainly named arr, Cake won't put it in the $this->data variable.

为了使Cake填充$ this-> data变量,发送的数据需要遵循格式数据[Model] [field],或者至少是data [..]数组的一部分。如果它明确地命名为arr,那么Cake不会将它放在$ this-> data变量中。