jQuery Datatables - footerCallback sum columns, issues with table total

Question

ive created a function that I can call on columns that I wish to sum up using the below. however the total (table total) entry for column 9 is always zero. the page total seems to work. and the page total and table total for column 9 works also.

"footerCallback": function ( row, data, start, end, display ) {
            var api = this.api(), data;
            // Remove the formatting to get integer data for summation
            var intVal = function ( i ) {
                return typeof i === 'string' ?
                    i.replace(/[\£,]/g, '')*1 :
                    typeof i === 'number' ?
                        i : 0;
            };
            var column_sum = function (col) {
                // Total over all pages
                total = api
                    .column(col)
                    .data()
                    .reduce( function (a, b) {
                        return intVal(a) + intVal(b);
                    }, 0 );
                // Total over this page
                pageTotal = api
                    .column(col, { page: 'current'} )
                    .data()
                    .reduce( function (a, b) {
                        return intVal(a) + intVal(b);
                    }, 0 );
                return accounting.formatMoney(pageTotal) +' ('+ accounting.formatMoney(total) +' total)'
            };
            // Update footer
            $( api.column(6).footer()).html(
                column_sum(6)
            );
            $( api.column(9).footer()).html(
                column_sum(9)
            );
        }

EDIT

I have added some sanitised data. currently the page total works for the first column and second columns.

The all pages total does not work. i.e each time I filter by the column header I should see the total across each page

<table width="100%" class="table table-striped table-bordered table-hover dataTable no-footer dtr-inline" id="circuit_list"
 role="grid" style="width: 100%;">
    <thead>
        <tr>
            <th>Info</th>
            <th>Type</th>
            <th>Cost PM</th>
            <th>Term</th>
            <th>Remaining Term</th>
            <th>Remaining Cost</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>
                <a href="/circuits/edit/238/1/all_cl" class="btn btn-primary btn-circle">
                    <i class="fa fa-list"></i>
                </a>
            </td>
            <td>Fibre</td>
            <td>£950.00</td>
            <td>12</td>
            <td>0</td>
            <td>£0.00</td>
        </tr>
        <tr>
            <td>
                <a href="/circuits/edit/238/2/all_cl" class="btn btn-primary btn-circle">
                    <i class="fa fa-list"></i>
                </a>
            </td>
            <td>Fibre</td>
            <td>£950.00</td>
            <td>12</td>
            <td>0</td>
            <td>£0.00</td>
        </tr>
        <tr>
            <td>
                <a href="/circuits/edit/333/101/all_cl" class="btn btn-primary btn-circle">
                    <i class="fa fa-list"></i>
                </a>
            </td>
            <td>MPLS</td>
            <td>£1791.33</td>
            <td>12</td>
            <td>11</td>
            <td>£19,704.63</td>
        </tr>
        <tr>
            <td>
                <a href="/circuits/edit/334/101/all_cl" class="btn btn-primary btn-circle">
                    <i class="fa fa-list"></i>
                </a>
            </td>
            <td>MPLS</td>
            <td>£100.00</td>
            <td>12</td>
            <td>11</td>
            <td>£1,100.00</td>
        </tr>
        <tr>
            <td>
                <a href="/circuits/edit/235/1/all_cl" class="btn btn-primary btn-circle">
                    <i class="fa fa-list"></i>
                </a>
            </td>
            <td>MPLS</td>
            <td>£593.33</td>
            <td>36</td>
            <td>15</td>
            <td>£8,899.95</td>
        </tr>
        <tr>
            <td>
                <a href="/circuits/edit/317/82/all_cl" class="btn btn-primary btn-circle">
                    <i class="fa fa-list"></i>
                </a>
            </td>
            <td>Fibre</td>
            <td>£103.00</td>
            <td>3</td>
            <td>0</td>
            <td>£0.00</td>
        </tr>
        <tr>
            <td>
                <a href="/circuits/edit/229/2/all_cl" class="btn btn-primary btn-circle">
                    <i class="fa fa-list"></i>
                </a>
            </td>
            <td>MPLS</td>
            <td>£373.33</td>
            <td>36</td>
            <td>11</td>
            <td>£4,106.63</td>
        </tr>
        <tr>
            <td>
                <a href="/circuits/edit/233/1/all_cl" class="btn btn-primary btn-circle">
                    <i class="fa fa-list"></i>
                </a>
            </td>
            <td>DSL</td>
            <td>£1837.66</td>
            <td>60</td>
            <td>6</td>
            <td>£11,025.96</td>
        </tr>
        <tr>
            <td>
                <a href="/circuits/edit/234/1/all_cl" class="btn btn-primary btn-circle">
                    <i class="fa fa-list"></i>
                </a>
            </td>
            <td>DSL</td>
            <td>£373.34</td>
            <td>36</td>
            <td>15</td>
            <td>£5,600.10</td>
        </tr>
        <tr>
            <td>
                <a href="/circuits/edit/243/5/all_cl" class="btn btn-primary btn-circle">
                    <i class="fa fa-list"></i>
                </a>
            </td>
            <td>DSL</td>
            <td>£373.34</td>
            <td>36</td>
            <td>15</td>
            <td>£5,600.10</td>
        </tr>
        <tr>
            <td>
                <a href="/circuits/edit/244/4/all_cl" class="btn btn-primary btn-circle">
                    <i class="fa fa-list"></i>
                </a>
            </td>
            <td>MPLS</td>
            <td>£373.34</td>
            <td>36</td>
            <td>12</td>
            <td>£4,480.08</td>
        </tr>
        <tr>
            <td>
                <a href="/circuits/edit/324/83/all_cl" class="btn btn-primary btn-circle">
                    <i class="fa fa-list"></i>
                </a>
            </td>
            <td>4G</td>
            <td>£103.00</td>
            <td>3</td>
            <td>0</td>
            <td>£0.00</td>
        </tr>
        <tr>
            <td>
                <a href="/circuits/edit/2/6/all_cl" class="btn btn-primary btn-circle">
                    <i class="fa fa-list"></i>
                </a>
            </td>
            <td>4G</td>
            <td>£41.50</td>
            <td>12</td>
            <td>0</td>
            <td>0.00</td>
        </tr>
        <tr>
            <td>
                <a href="/circuits/edit/57/18/all_cl" class="btn btn-primary btn-circle">
                    <i class="fa fa-list"></i>
                </a>
            </td>
            <td>4G</td>
            <td>£45.00</td>
            <td>12</td>
            <td>0</td>
            <td>£0.00</td>
        </tr>
        <tr>
            <td>
                <a href="/circuits/edit/113/35/all_cl" class="btn btn-primary btn-circle">
                    <i class="fa fa-list"></i>
                </a>
            </td>
            <td>Fibre</td>
            <td>£45.00</td>
            <td>12</td>
            <td>0</td>
            <td>£0.00</td>
        </tr>
        <tr>
            <td>
                <a href="/circuits/edit/218/71/all_cl" class="btn btn-primary btn-circle">
                    <i class="fa fa-list"></i>
                </a>
            </td>
            <td>4G</td>
            <td>£57.00</td>
            <td>12</td>
            <td>0</td>
            <td>£0.00</td>
        </tr>
        <tr>
            <td>
                <a href="/circuits/edit/264/71/all_cl" class="btn btn-primary btn-circle">
                    <i class="fa fa-list"></i>
                </a>
            </td>
            <td>MPLS</td>
            <td>£45.00</td>
            <td>12</td>
            <td>0</td>
            <td>£0.00</td>
        </tr>
        <tr>
            <td>
                <a href="/circuits/edit/269/61/all_cl" class="btn btn-primary btn-circle">
                    <i class="fa fa-list"></i>
                </a>
            </td>
            <td>DSL</td>
            <td>£45.00</td>
            <td>12</td>
            <td>0</td>
            <td>£0.00</td>
        </tr>
        <tr>
            <td>
                <a href="/circuits/edit/300/85/all_cl" class="btn btn-primary btn-circle">
                    <i class="fa fa-list"></i>
                </a>
            </td>
            <td>4G</td>
            <td>£30.00</td>
            <td>12</td>
            <td>&nbsp;</td>
            <td>&nbsp;</td>
        </tr>
        <tr>
            <td>
                <a href="/circuits/edit/307/76/all_cl" class="btn btn-primary btn-circle">
                    <i class="fa fa-list"></i>
                </a>
            </td>
            <td>4G</td>
            <td>£45.00</td>
            <td>12</td>
            <td>6</td>
            <td>270.00</td>
        </tr>
    </tbody>
</table>

Do you have a sample of the column data? Also, does the table total for col 9 work or not? You write: "the total (table total) entry for column 9 is always zero" and "and the page total and table total for column 9 works also." So which is it? — lofihelsinki

Jannes Botis Jannes Botis · Accepted Answer · 2018-02-25T13:36:51

Most probably in one or more of the cells for column 9, the value there fails to convert to a number and you are getting a NaN returned by intVal function.

There are 2 issues in intVal:

line i.replace(/[\£,]/g, '')*1 can return NaN
typeof i === 'number' can be true for NaN

From what it seems, intVal is trying to check for this, but the logic is wrong. change the intVal to:

var intVal = function ( i ) {

   if(typeof i === 'string') {
         i = i.replace(/[\£,]/g, '')*1;
   }
   // check if you got a valid number.
   if (Number.isNaN(i)) {
         return 0;
   }
   return i;
};

If the filtered total is needed, use:

total = api.column(col, {"filter": "applied"})

or

total = api.column(col, {"search": "applied"})

jQuery Datatables - footerCallback sum columns, issues with table total

1 Answers