使用GET请求中的JSON数组填充数据表 [英] Populating Datatables with JSON array from GET request

问题描述

我知道有很多关于使用数据填充Jquery Datatables 的答案和教程，但我总是这样做获得以下异常的重点：

I know that there has been many answers and tutorials about populating Jquery Datatables with data but I always get to the point of getting the following exception:

未捕获TypeError：无法读取未定义属性'length'

Uncaught TypeError: Cannot read property 'length' of undefined

我主要是一个后端开发人员，几乎没有编写客户端的经验，所以我想问你在下面的例子中我做错了什么。

I, being mainly a backend developer, have little to no experience with writing client so I would like to ask you about what I am doing wrong in the following example.

我有一台本地运行的服务器暴露一个端点 / destination ，它以这种格式响应一个JSON字符串：

I have a server running locally exposing an endpoint /destination which responds with a JSON string in this format:

[{
    "id": 1,
    "name": "London Heathrow",
    "lat": 51.470022,
    "lon": -0.454295
}, {
    "id": 2,
    "name": "London Gatwick",
    "lat": 51.153662,
    "lon": -0.182063
}, {
    "id": 3,
    "name": "Brussels Airport",
    "lat": 50.900999,
    "lon": 4.485574
}, {
    "id": 4,
    "name": "Moscow Vnukovo",
    "lat": 55.601099,
    "lon": 37.266456
}]

我想使用Datatables插件在表格中显示这些数据。这是表格代码：

I would like to display these data in a table using the Datatables plugin. This is the table code:

<table id="example" class="display" cellspacing="0" width="100%">
     <thead>
         <tr>
             <th>ID</th>
             <th>Name</th>
             <th>Lattitude</th>
             <th>Longitude</th>
         </tr>
        </thead>
 </table>

填写它的脚本：

$(document).ready(function() {
    $('#example').DataTable({
        "processing" : true,
        "ajax" : {
            "url" : ".../destination",
            "type" : "GET"
        },
        "columns" : [ {
            "data" : "id"
        }, {
            "data" : "name"
        }, {
            "data" : "lat"
        }, {
            "data" : "lon"
        }]
    });
});

如上所述，我得到未捕获的TypeError：无法读取属性'长度'未定义。感谢任何帮助。

As specified above, I am getting the Uncaught TypeError: Cannot read property 'length' of undefined. Any help is appreciated.

编辑：如果我请求数据然后将数据传递到数据表，它可以工作，如下所示：

It works if I do a request for the data and then pass the data to the datatables as follows:

$.ajax({
            url : '/AOS-project/destination',
            type : 'GET',
            dataType : 'json',
            success : function(data) {
                assignToEventsColumns(data);
            }
        });

        function assignToEventsColumns(data) {
            var table = $('#example').dataTable({
                "bAutoWidth" : false,
                "aaData" : data,
                "columns" : [ {
                    "data" : "id"
                }, {
                    "data" : "name"
                }, {
                    "data" : "lat"
                }, {
                    "data" : "lon"
                } ]
            })
        }

我原本希望数据表能够将这个功能烘焙...

I was expecting the datatables to have this functionality baked in...

推荐答案

将 dataSrc 设置为''。正如 文档 所述：

Set dataSrc to ''. As the documentation states :

通过Ajax从文件中获取JSON数据，使用dataSrc 从
普通数组中读取数据 而不是对象中的数组：

Get JSON data from a file via Ajax, using dataSrc to read data from a plain array rather than an array in an object:

$(document).ready(function() {
    $('#example').DataTable({
        "processing" : true,
        "ajax" : {
            "url" : "https://api.myjson.com/bins/14t4g",
            dataSrc : ''
        },
        "columns" : [ {
            "data" : "id"
        }, {
            "data" : "name"
        }, {
            "data" : "lat"
        }, {
            "data" : "lon"
        }]
    });
});

您的代码有效 - > http://jsfiddle.net/nzn5m6vL/

and your code works -> http://jsfiddle.net/nzn5m6vL/

这篇关于使用GET请求中的JSON数组填充数据表的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！