jQuery DataTables 基于多个值过滤行

Question

我正在尝试使用多个过滤器，这些过滤器将根据选择的过滤器隐藏/显示我的数据表上的行。我的计划是将过滤器值放在一个数组中，并将它们与第一列中的数据搜索属性进行比较，但我目前拥有的不起作用。

这是一个 JSfiddle，我在下面加上代码 https://jsfiddle.net/dmcgrew/06j4pxjk/3/

带有过滤器和表格数据复选框的 HTML..

<label>
    <input type="checkbox" name="cat" value="cat" class="filter"> Cats
</label>

<label>
    <input type="checkbox" name="dog" value="dog" class="filter"> Dogs
</label>

<table class="select_items">
    <thead>
        <tr>
            <th>Item</th>
            <th>Description</th>
            <th>Crest Allowed</th>
            <th>&nbsp;</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td data-search="cat">1</td>
            <td>Testing Bowl</td>
            <td>NO</td>
            <td><button class="button">Select</button></td>
        </tr>
        <tr>
            <td data-search="dog">32</td>
            <td>Cup Test</td>
            <td>NO</td>
            <td><button class="button">Select</button></td>
        </tr>
        <tr>
            <td data-search="dog">3335</td>
            <td>Bowl Test</td>
            <td>NO</td>
            <td><button class="button">Select</button></td>
        </tr>

    </tbody>
</table>

JS..

var select_items = $('.select_items').DataTable();

var filters = [];

$('input.filter').on('change', function(){
   var filters = [];
   $("input.filter:checked").each(function(){

    var checkedBox = $(this).val();
    if (filters.indexOf(checkedBox) === -1){
        filters.push(checkedBox);
    }
   });

   console.log(filters);

   if(this.checked){
      $.fn.dataTable.ext.search.push(
         function (settings, data, dataIndex){
            return (data[0].indexOf(filters) > -1) ? true : false;
         }
      );
   } 

   select_items.draw();

   if(this.checked){
      $.fn.dataTable.ext.search.pop();    
   }
});

Answer 1

您必须检查filter 的长度。

如果没有filter，则$.fn.dataTable.ext.search.push 函数必须为所有行返回true。

而且，我认为search.pop() 也应该适用于取消选中...

var select_items = $('.select_items').DataTable();


$('input.filter').on('change', function(){
  var filters = [];
  $("input.filter:checked").each(function(){
    var checkedBox = $(this).val();
    if (filters.indexOf(checkedBox) === -1){
      filters.push(checkedBox);
    }
  });

  console.log(filters.length);

  $.fn.dataTable.ext.search.push(function(settings, data, dataIndex){
    if(filters.length>0){
      return (data[0].indexOf(filters) > -1) ? true : false;
    }else{
      return true;
    }
  });

  select_items.draw();
  $.fn.dataTable.ext.search.pop();
});

Updated Fiddle

Answer 2

我使用fnFilter API 对您的代码进行了一些更改：

文档：https://datatables.net/docs/DataTables/1.9.0/DataTable.html#fnFilter

$(function() {
  otable = $('.select_items').dataTable();
})

function filterme() {
  //build a regex filter string with an or(|) condition
  var types = $('input:checkbox[name="filter"]:checked').map(function() {
    return '^' + this.value + '\$';
  }).get().join('|');
  //filter in column 0, with an regex, no smart filtering, no inputbox,not case sensitive
  otable.fnFilter(types, 0, true, false, false, false);  
}

你可以在这里看到它的工作原理：JSFiddle demo

Answer 3

考虑到，接受的答案是指旧接口fnFilter，并且从 DataTables 1.10 开始，建议使用新 API，我将允许自己提供更多最新的解决方案，在我看来，这种解决方案更具可扩展性、更简洁简单：

//define statical data
var srcData = [
  {search: 'Cat', item: '1', descr: 'Testing Bowl', crest: 'NO'},
  {search: 'Dog', item: '32', descr: 'Cup Test', crest: 'NO'},
  {search: 'Dog', item: '3335', descr: 'Bowl Test', crest: 'NO'},
];
//define dataTable object
var dataTable = $('#mytable').DataTable({
  sDom: 't',
  data: srcData,
  columns: [
    {title: 'Item', data: 'item'},
    {title: 'Description', data: 'descr'},
    {title: 'Crest Allowed', data: 'crest'},
  ]
});
//put in place dynamically created checkboxes
var searchValues = [];
dataTable.data().sort().toArray().forEach(row => {
  if(searchValues.indexOf(row.search)==-1) searchValues.push(row.search);
});
var checkboxes = searchValues.reduce((html, item) => html += `<input type="checkbox" value="${item}" class="filter">${item}</input>`,'');
$(checkboxes).insertBefore($('#mytable'));
//employ $.fn.DataTable.ext.search
var lookupValues = [];
$.fn.DataTable.ext.search.push((settings, row, index, rowObj) => lookupValues.indexOf(rowObj.search) > -1 || lookupValues.length == 0);
//watch checkboxes and redraw table on change accordingly
$(".filter").on('change', () => {
  lookupValues = [...$('.filter:checked')].map(checkbox => $(checkbox).val());
  dataTable.draw();
});

<!doctype html>
<html>
<head>
  <script type="application/javascript" src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
  <script type="application/javascript" src="https://cdn.datatables.net/1.10.19/js/jquery.dataTables.min.js"></script>
  <link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/1.10.19/css/jquery.dataTables.min.css">
</head>
<body>
  <table id="mytable"></table>
</body>
</html>