jQuery 自动完成 - 无效标签 (Firebug) / 未捕获的语法错误 (Chrome)

发布于 2024-10-24 02:52:03 字数 3290 浏览 1 评论 0原文

在 SO 的好心人的帮助下,我成功地让我的自动完成功能在 CodeIgniter 2.0 的基本测试页面上运行。

当我将代码移动到实际页面时,出现了问题。

一旦我输入第一个字母,我就会进入 Firebug

invalid label
[Break On This Error] {"response":"true","message":[{"label"... My Park","value":"Thier  Park"}]}

和 Chrome

// jquery.min.js:line 16
Uncaught SyntaxError: Unexpected token :
d.d.extend.globalEvaljquery.min.js:16
d.ajaxSetup.converters.text scriptjquery.min.js:16
bQjquery.min.js:16
vjquery.min.js:16
d.support.ajax.d.ajaxTransport.send.c

这是我的 CI 视图代码:

<script>
    $(document).ready(function() {    

        $("#exer_loc").autocomplete({
            source: function(req, add){
                $.ajax({
                    url: '<?php echo base_url(); ?>exercise/loc_autocomplete',
                    dataType: 'json',
                    type: 'POST',
                    data: req,
                    success: function(data){
                        if(data.response =='true'){
                           add(data.message);
                        }
                    }
                });
        },
        minLength: 1,
        select: function(event, ui){
            $(this).end().val(ui.item.value);
            }
        });

     });   
</script>

和我的 CI 控制器代码:

public function loc_autocomplete()
{

    $search = $this->input->post('term');

    $data['response'] = 'false';
    $this->db->select('*');
    $this->db->from('loc_exercise');
    $this->db->like('locations', $search);
    $locations = $this->db->get()->result();

    if (count($locations) > 0) {
        $data['message'] = array();

        foreach ($locations as $location) {
            $data['message'][] = array('label' => $location->locations,
                'item'  => $location->locations,
                'value' => $location->locations );
        }

        $data['response'] = 'true';
    }
    echo json_encode($data);
}

如上所述,这一切都在 CI 的基本页面上完美运行。

但是当它输出到我的标准 CI 模板时,我收到错误。我已经禁用了其他几个 JS 脚本,但问题仍然存在。

奇怪的是,如果我在上面的 CI 视图脚本运行之前重复下载 jQuery。但显然这不是一个解决方案:P。

    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.5/jquery.min.js"></script>

    <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js"></script>
    <script>
        $(document).ready(function() {    

            $("#exer_loc").autocomplete({
                source: function(req, add){
etc...

有人知道如何杀死这个错误吗?

谢谢!

编辑:

这是控制台上的 JSON 响应

    [Object { label="My Place", item="My Place", value="My Place"}, Object { label="Pond Park", item="Pond Park", value="Pond Park"}, Object { label="Rock Park", item="Rock Park", value="Rock Park"}]

//html
{"response":"true","message":[{"label":"My Place","item":"My Place","value":"My Place"},{"label":"Fresh Pond Park","item":"Fresh Pond Park","value":"Fresh Pond Park"},{"label":"Cat Rock Park","item":"Cat Rock Park","value":"Cat Rock Park"}]}

编辑2:

使用 console.log(req) 显示

Object { term="asd"}

With help from the good folks here at SO I managed to make my autocomplete run on a bare bones test page on CodeIgniter 2.0.

When I move the code to the actual page, there's a problem.

As soon as I type the first letter, I get on Firebug

invalid label
[Break On This Error] {"response":"true","message":[{"label"... My Park","value":"Thier  Park"}]}

and on Chrome

// jquery.min.js:line 16
Uncaught SyntaxError: Unexpected token :
d.d.extend.globalEvaljquery.min.js:16
d.ajaxSetup.converters.text scriptjquery.min.js:16
bQjquery.min.js:16
vjquery.min.js:16
d.support.ajax.d.ajaxTransport.send.c

Here is my CI view code:

<script>
    $(document).ready(function() {    

        $("#exer_loc").autocomplete({
            source: function(req, add){
                $.ajax({
                    url: '<?php echo base_url(); ?>exercise/loc_autocomplete',
                    dataType: 'json',
                    type: 'POST',
                    data: req,
                    success: function(data){
                        if(data.response =='true'){
                           add(data.message);
                        }
                    }
                });
        },
        minLength: 1,
        select: function(event, ui){
            $(this).end().val(ui.item.value);
            }
        });

     });   
</script>

and my CI controller code:

public function loc_autocomplete()
{

    $search = $this->input->post('term');

    $data['response'] = 'false';
    $this->db->select('*');
    $this->db->from('loc_exercise');
    $this->db->like('locations', $search);
    $locations = $this->db->get()->result();

    if (count($locations) > 0) {
        $data['message'] = array();

        foreach ($locations as $location) {
            $data['message'][] = array('label' => $location->locations,
                'item'  => $location->locations,
                'value' => $location->locations );
        }

        $data['response'] = 'true';
    }
    echo json_encode($data);
}

As above, this all works perfectly on a bare bones page within CI.

But when this is output to my standard CI template I get the errors. I've disabled several other JS scripts and the problem persists.

Curiously, if I repeat the download of jQuery right before the CI view script above it works. But obviously that's not a solution :P.

    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.5/jquery.min.js"></script>

    <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js"></script>
    <script>
        $(document).ready(function() {    

            $("#exer_loc").autocomplete({
                source: function(req, add){
etc...

Anyone know how to kill this bug?

Thanks!

EDIT:

Here is the JSON response on the console

    [Object { label="My Place", item="My Place", value="My Place"}, Object { label="Pond Park", item="Pond Park", value="Pond Park"}, Object { label="Rock Park", item="Rock Park", value="Rock Park"}]

//html
{"response":"true","message":[{"label":"My Place","item":"My Place","value":"My Place"},{"label":"Fresh Pond Park","item":"Fresh Pond Park","value":"Fresh Pond Park"},{"label":"Cat Rock Park","item":"Cat Rock Park","value":"Cat Rock Park"}]}

EDIT2:

Using console.log(req) shows

Object { term="asd"}

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信愁 2024-10-31 02:52:04

听起来它与此处列出的 jQuery 重复 ajax 调用错误有关: jQuery Bug #8398

事实证明jQuery 1.5 正在将 json 的后续 ajax 调用修改为 jsonp,这会导致此错误。

我通过遵循错误更改历史记录中建议的解决方法之一来修复它,并在进行 ajax 调用之前将以下代码放置在某处:

$.ajaxSetup({
   jsonp: null,
   jsonpCallback: null
});

也应该修复其他 ajax 请求的任何问题。

Sounds like it's related to a jQuery repeat ajax call bug listed here: jQuery Bug #8398

It turns out that jQuery 1.5 is modifying subsequent ajax calls for json to jsonp which leads to this error.

I fixed it by following one of the workarounds suggested in the bug change history and placing the following code somewhere before my ajax calls are made:

$.ajaxSetup({
   jsonp: null,
   jsonpCallback: null
});

Should fix any problems for other ajax requests too.

~没有更多了~
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