我正在尝试让DataTables从AJAX数据源中读取列名,但似乎必须有一些我必须在这里丢失的内容。
我制作了一个小提琴fiddle,我可以在其中手动定义表格使用的数据和列。
该表在HTML中声明,无需定义列名(<thead>..</thead>
):
<table id="example" class="display table table-striped table-bordered"
cellspacing="0" width="100%"></table>
在JS中我们手动定义数据:
var data = [
[ "Row 1 - Field 1", "Row 1 - Field 2", "Row 1 - Field 3" ],
[ "Row 2 - Field 1", "Row 2 - Field 2", "Row 2 - Field 3" ],
];
然后手动定义列名称或标题:
var columns = [
{ "title":"One" },
{ "title":"Two" },
{ "title":"Three" }
];
然后,当我们初始化表时,我们只是将以前声明的信息传递给DataTables使用:
$(document).ready(function() {
$('#example').DataTable( {
dom: "Bfrtip",
data: data,
columns: columns
});
});
结果是:
现在我的问题是,如果数据包含在AJAX server side response中,我将如何才能实现这一目标?
我已经以各种方式和形式尝试了这一点,但似乎没有什么似乎在这里工作,我正在努力寻找相关的文件。
例如,如果服务器端处理发回了一个JSON响应,其中包含最后的列名:
{
"data": [
{
"id": "1",
"One": "Row 1 - Field 1",
"Two": "Row 1 - Field 2",
"Three": "Row 1 - Field 3"
},
{
"id": "2",
"One": "Row 2 - Field 1",
"Two": "Row 2 - Field 2",
"Three": "Row 2 - Field 3"
}
],
"options": [],
"files": [],
"columns": [
{
"title": "One",
"data": "One"
},
{
"title": "Two",
"data": "Two"
},
{
"title": "Three",
"data": "Three"
}
]
}
鉴于这是响应,我尝试将DataTables配置为使用AJAX数据源获取行信息,如下所示:
$(document).ready(function() {
$('#example').DataTable( {
dom: "Bfrtip",
"ajax": '/test.php',
columns: columns
});
});
但显然columns
在这里未定义。
所以我事先得到了列数据:
function getPromise() {
var deferred = $.Deferred();
var dataUrl = document.location.origin+'/text.php';
$.getJSON(dataUrl, function(jsondata) {
setTimeout(function() {
deferred.resolve(jsondata);
}, 0);
}).fail(function( jqxhr, textStatus, error ) {
// ********* FAILED
var err = textStatus + ", " + error;
console.log( "Request Failed: " + err );
});
return deferred.promise();
}
// Get the columns
getPromise().done(function(jsondata) {
columns = jsondata.columns;
console.log(columns);
});
并将其传递给DataTables,如上所述。但是这次我在运行示例时得到的是控制台中的错误TypeError: p is undefined
。
那么我怎样才能利用在服务器端响应中返回的动态生成的列?有没有更简单的方法来实现这一目标?
编辑:
DataTables用于服务器端处理的编辑器代码/用于生成上述JSON响应:
<?php
// DataTables PHP library
require_once '/path/to/DataTables.php';
// Alias Editor classes so they are easy to use
use
DataTables\Editor,
DataTables\Editor\Field,
DataTables\Editor\Format,
DataTables\Editor\Mjoin,
DataTables\Editor\Upload,
DataTables\Editor\Validate;
// Build our Editor instance and process the data coming from _POST
$out = Editor::inst( $db, 'example' )
->fields(
Field::inst( 'id' )->set(false),
Field::inst( '`One`' )->validator( 'Validate::notEmpty' ),
Field::inst( '`Two`' )->validator( 'Validate::notEmpty' ),
Field::inst( '`Three`' )->validator( 'Validate::notEmpty' )
)
->process( $_POST )
->data();
// On 'read' remove the DT_RowId property so we can see fully how the `idSrc`
// option works on the client-side.
if ( Editor::action( $_POST ) === Editor::ACTION_READ ) {
for ( $i=0, $ien=count($out['data']) ; $i<$ien ; $i++ ) {
unset( $out['data'][$i]['DT_RowId'] );
}
}
// Create the thead data
if (count ($out) > 0) {
$columns = array();
foreach ($out['data'][0] as $column=>$relativeValue) {
// Add all but the id value
if ($column !== 'id') {
// Add this column name
$columns[] = array(
"title"=>$column,
"data"=>$column
);
}
}
}
// Add the the thead data to the ajax response
$out['columns'] = $columns;
// Send the data back to the client
echo json_encode( $out );
答案 0 :(得分:5)
如果您不使用内置的DataTables ajax
,根据您的数据结构应该很容易:
$(document).ready(function() {
$.ajax({
type: 'POST',
dataType: 'json',
url: '/echo/json/',
data: {
json: JSON.stringify(jsonData)
},
success: function(d) {
$('#example').DataTable({
dom: "Bfrtip",
data: d.data,
columns: d.columns
});
}
});
});
与this JSFiddle一样,您只能立即加载所有数据,但这不应该是一个大问题......除非您更改它,否则请从初始ajax
调用中获取列一旦DataTable启动,然后添加内置的ajax
- 我没试过这个......
答案 1 :(得分:0)
您必须使用不带标题的html创建表
<table id="tablaListadoExpediciones" class="table table-bordered table-striped dt-responsive"> </table>
现在,您必须动态生成columns数组。这样,即使AJAX响应随时间变化,列也将始终自动生成。
function PintarTablaDinamicamente(datos) {//object "datos" comes from AJAX response
//I take the keys of the object as columns of the table
var arrColumnas = Object.keys(datos[0])
////In case you wanted to hide a column
//var indiceColumna = arrColumnas.indexOf("nameOfTheColumnToHide")
//if (indiceColumna !== -1) {
// arrColumnas.splice(indiceColumna, 1)
//}
var columns = []
//columns must be in JSON format-->{data:'keyToSearchInJSON',title:'columnTitle'}
for (var i in arrColumnas) {
//if (arrColumnas[i] == "SELECCIONAR") { //if you want to add a checkbox in one colunm (for example column named SELECT
// columns.push({
// data: null,
// defaultContent: '',
// className: 'select-checkbox',
// orderable: false
// });
//} else {
columns.push({ data: arrColumnas[i], title: arrColumnas[i] });
//}
}
tabla = $('#tablaListadoExpediciones').DataTable({
dom: "Blfrtip",
data: datos,
//order: [[0, 'desc']],
"pageLength": 25,
"scrollX": true,
columns: columns
,
buttons: [
{
extend: 'copy'
},
{
extend: 'excel'
},
{
extend: 'print'
}
],
//select: {
// style: 'os',
// selector: 'td:first-child'
//}
});
}