Question

使用以下代码，我可以使用ajax请求以下面的格式填充数据表。

$("#example").DataTable({
ajax: {
            url: 'test.json',    
            dataSrc: 'dataset1'  
        },
        "columns": [
            {
                "data": "name"
            },
            {
                "data": "age"
            },
            {
                "data": "gender"
            }]
});

但是，我如何才能获得与下面数据集相同的结果？

{
  "DataSet2" : {
    "-L5_3n2zzOprYrfRRowd" : {
      "name" : "John",
      "age" : "42",
      "gender" : "M"
    },
    "-L5cf-S1s97ZHdy-0YeN" : {
      "name" : "Mathew",
      "age" : "39",
      "gender" : "M"
    }
  }
}

更新下面是我想要完成的更新。数据与上述不同，但想法是一样的。下面适用于Json文件，如下所示。

然而，我需要使用相同的数据，然后使用Firebase。在firebase中，每个项目都有一个按键

期望的结果应如下所示。 enter image description here

HTML：

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>MK</title>
    <!-- DATATABLES -->
    <link rel="stylesheet" type="text/css" href="https://www.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
    <link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/1.10.16/css/dataTables.bootstrap.min.css">
    <!-- RESPONSIVENESS -->
    <link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/responsive/2.2.1/css/responsive.dataTables.min.css">
    <!-- DATETIMEPICKER -->
    <link rel="stylesheet" type="text/css" href="https://rawgit.com/smalot/bootstrap-datetimepicker/master/css/bootstrap-datetimepicker.css">
    <!-- DATATABLES FREE EDITOR -->
    <link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/buttons/1.5.1/css/buttons.dataTables.min.css">
    <link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/select/1.2.4/css/select.dataTables.min.css">
    <!-- MYCSS -->
    <link rel="stylesheet" type="text/css" href="style.css">
</head>

<body>
    <input type='text' id="dateTime" class="dateTime" placeholder="Date Time" readonly>

    <div id='tableContainer'>

        <table id="example" class="table table-striped table-bordered" cellspacing="0" width="100%">
            <thead>
                <tr>
                    <th></th><!-- COLUMN FOR RESPONSIVENESS -->
                    <th>INBOUND</th>
                    <th>ORG</th>
                    <th>STA</th>
                    <th>ETA</th>
                    <th>OUTBOUND</th>
                    <th>DES</th>
                    <th>STD</th>
                    <th>ETD</th>
                    <th>REMARKS</th>
                    <th>GATE</th>
                    <th>WHS</th>
                    <th>TEST</th>
                    <th>ARR</th>
                </tr>
            </thead>
        </table>

    </div>

</body>
<!-- FIREBASE -->
<script src="https://www.gstatic.com/firebasejs/4.9.0/firebase.js"></script>
<!-- JQUERY -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<!-- DATATABLES -->
<script src="https://cdn.datatables.net/1.10.16/js/jquery.dataTables.min.js"></script>
<script src="https://cdn.datatables.net/1.10.16/js/dataTables.bootstrap.min.js"></script>
<!-- RESPONSIVENESS -->
<script src="https://cdn.datatables.net/responsive/2.2.1/js/dataTables.responsive.min.js"></script>
<!-- DATETIMEPICKER -->
<script src="https://rawgit.com/smalot/bootstrap-datetimepicker/master/js/bootstrap-datetimepicker.min.js"></script>
<!-- DATATABLES FREE EDITOR -->
<script src="https://cdn.datatables.net/buttons/1.5.1/js/dataTables.buttons.min.js"></script>
<script src="https://cdn.datatables.net/select/1.2.4/js/dataTables.select.min.js"></script>
<script src="datatablesAltEditor.js"></script>
<!-- MYJS -->
<script src="libs.js"></script>

JS：

    $("#example").DataTable({
    select: 'single',
    responsive: true,
    paging: true,
    pageLength: 25,
    order: [
        [3, 'asc']
    ],
    ajax: {
        url: 'dbs.json',
        dataSrc: 'dataset1'
    },
    "columns": [{
            "data": null,
            defaultContent: '',
            className: 'control',
            orderable: false
        }, // RESPONSIVENESS
        {
            "data": "inbound"
        },
        {
            "data": "org"
        },
        {
            "data": "sta"
        },
        {
            "data": "eta"
        },
        {
            "data": "outbound"
        },
        {
            "data": "des"
        },
        {
            "data": "std"
        },
        {
            "data": "etd"
        },
        {
            "data": "remarks"
        },
        {
            "data": "gate"
        },
        {
            "data": "whs"
        },
        {
            "data": null,
            render: function(data, type, row) {
                return data.flight + ' ' + data.org;
            }
        },
        {
            data: "arr"
        }
    ]
});

JSON：

{
"dataset1": [{
    "inbound": "MK509",
    "org": "ICN",
    "sta": "12DEC17 16:45",
    "eta": "12DEC17 17:35",
    "outbound": "MK509",
    "des": "ARN",
    "std": "12DEC17 18:45",
    "etd": "12DEC17 19:35",
    "remarks": "DELAYED",
    "gate": "S96",
    "whs": "T11",
    "arr": "X"
}, {
    "inbound": "RT8101",
    "org": "DOH",
    "sta": "12DEC17 08:25",
    "eta": "12DEC17 08:25",
    "outbound": "RT8101",
    "des": "ORD",
    "std": "12DEC17 10:25",
    "etd": "12DEC17 10:25",
    "remarks": "COW CHARTER",
    "gate": "S94",
    "whs": "T9",
    "arr": "X"
}],
"dataset2": [{
    "flight": "KIKKER1",
    "org": "ICN",
    "sta": "12DEC17 16:45",
    "eta": "12DEC17 17:35",
    "flight": "KE509",
    "des": "ARN",
    "std": "12DEC17 18:45",
    "etd": "12DEC17 19:35",
    "remarks": "DELAYED",
    "gate": "S96",
    "whs": "T11",
    "ciss": "X",
    "arr": "X"
}, {
    "flight": "KIKKER2",
    "org": "DOH",
    "sta": "12DEC17 08:25",
    "eta": "12DEC17 08:25",
    "flight": "QR8101",
    "des": "ORD",
    "std": "12DEC17 10:25",
    "etd": "12DEC17 10:25",
    "remarks": "COW CHARTER",
    "gate": "S94",
    "whs": "T9",
    "ciss": "X",
    "arr": "X"
}]

}

Answer 1

创建一个列数组。获取每个对象的子节点并使用Object.keys（）在其上循环以获取键值。最后将数据推送到列数组

let columns = [];
let data = [];
firebase.db().ref("DataSet2").once("value", function(snap){
    snap.forEach(snapshot => {
        Object.keys(snapshot.val()).map(k => {
              columns.push(Object.assign({}, {"data":k}))
              data.push(Object.assign({}, {k:snapshot.val()[k]}))
        })
    })
})
console.log(columns)
console.log(data)

现在将列和数据分配给DataTable

$("#example").DataTable({
ajax: {
        url: 'test.json',    
        dataSrc: data 
      },
      "columns": columns
});

如何使用来自JSON文件的ajax请求填充表

1 个答案: