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PODataTables - where should I update aData?
 

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  1. PODataTables - where should I update aData?
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    <p>In my table I have very 4 columns: Name, Age, Percentage, Checkbox column<br/> <a href="http://live.datatables.net/umezez/51/edit" rel="nofollow">http://live.datatables.net/umezez/51/edit</a></p> <p>What I'm trying to do is to set value of percent column based on checkbox in last column. Idea is to sum age column in footer based on that checkbox (this part I have done) and calculate percent value base on that footer.</p> <p>When I try to debug and I put my updated data to console I see that percent value is correctly updated, but table isn't updated.</p> <p>My idea is to update row in <code>fnRowCallback</code> but I think table should be updated when I modify data in <code>fnPreDrawCallback</code></p> <p>I'm using DataTables 1.9.4.<br/> Here is my code:</p> <pre><code>$(document).ready(function () { $(document).on('click', "input.updateFooter", function () { var rowIndex = oTable1.fnGetPosition($(this).closest('tr')[0]); var ok = this.checked ? 1 : 0; oTable1.fnSettings().aoData[rowIndex]._aData.use = ok; oTable1.fnDraw(); }); var iTotal = 0, rowsInUse = 0; var oTable1 = $('#example1').dataTable({ "table-layout": "fixed", "oLanguage": { "sZeroRecords": "No data" }, "fnPreDrawCallback": function (oSettings) { iTotal = 0; rowsInUse = 0; for (var i = 0; i &lt; oSettings.aoData.length; i++) { if (oSettings.aoData[i]._aData.use == 1) { iTotal += oSettings.aoData[i]._aData.age; rowsInUse++; } } for (var j = 0; j &lt; oSettings.aoData.length; j++) { if (oSettings.aoData[j]._aData.use == 1) { oSettings.aoData[j]._aData.percent = (parseInt(oSettings.aoData[j]._aData.age) / iTotal * 100).toFixed(2) + "%"; } else { oSettings.aoData[j]._aData.percent = ""; } } //console.log(oSettings.aoData); }, "fnRowCallback": function (nRow, aData, iDisplayIndex, iDisplayIndexFull) { console.log(aData); }, "fnDrawCallback": function (oSettings) { //oSettings.aoData[0]._aData.percent = "24%"; }, "fnFooterCallback": function (nRow, aaData, iStart, iEnd, aiDisplay) { if (rowsInUse &gt; 0) { $('#sum .c0').html(iTotal); $('#avg .c0').html(rowsInUse &gt; 0 ? (iTotal / rowsInUse).toFixed(2) : 0); } }, "bPaginate": false, "bLengthChange": false, "bFilter": false, "bSort": true, "bInfo": false, "bAutoWidth": false, "aaSorting": [ [0, "asc"] ], "aaData": [{ name: "Tomek", age: 20, percent: "20%", use: 1 }, { name: "John", age: 30, percent: "80%", use: 1 }], "aoColumns": [{ "sTitle": "Name", "bVisible": true, "sType": "string", "sWidth": "100px", "mData": "name" }, { "sTitle": "Age", "bVisible": true, "sType": "", "sWidth": "50px", "sClass": "center percent", "mData": "age" }, { "sTitle": "%", "bVisible": true, "sType": "", "sWidth": "50px", "sClass": "center percent", "mData": "percent" }, { "sTitle": "", "bVisible": true, "bSortable": false, "sType": "string", "sWidth": "20px", "sClass": "center", "mData": "use", mRender: function (data) { return '&lt;input type="checkbox" class="updateFooter" name="d" ' + (data == 1 ? 'checked="checked"' : '') + ' /&gt;'; } }] }); }); </code></pre>
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