jquery datatables: adding extra column

Question

Scenario

I am using datatables (@version 1.9.4) for the first time to display data to the user. I succeed in retrieving the data via ajax and in bin

Answer 1

You can define your columns in a different way like this

"aoColumns": [
        null,
        null,
        null,
        null,
        null,
        { "mData": null }
    ]

or this

"aoColumnDefs":[
    {
        "aTargets":[5],
        "mData": null
    }
]

Here some docs Columns

Take a look at this DataTables AJAX source example - null data source for a column

Note that prior to DataTables 1.9.2 mData was called mDataProp. The name change reflects the flexibility of this property and is consistent with the naming of mRender. If 'mDataProp' is given, then it will still be used by DataTables, as it automatically maps the old name to the new if required.

Another solution/workaround could be adding that '5' parameter...

For example adding extra "" to each row

like this:

    [
        "IT",
        "10030",
        "VILLAREGGIA",
        "TO",
        "Torino",
        ""
    ],
    [
        "IT",
        "10030",
        "VISCHE",
        "TO",
        "Torino",
        ""
    ]

Answer 2

Just in case anyone using a newer version of DataTables (1.10+) is looking for an answer to this question, I followed the directions on this page:

https://datatables.net/examples/ajax/null_data_source.html

Answer 3

Posting this answer here, just to show that where the aoColumnDefs needs to be defined. I got help from this question it self, but I struggled for a while for where to put the aoColumnDefs. Further more also added the functionality for onclick event.

$(document).ready(function() {
  var table = $('#userTable').DataTable( {
        "sAjaxSource": "/MyApp/proctoring/user/getAll",
        "sAjaxDataProp": "users",
        "columns": [
                    { "data": "username" },
                    { "data": "name" },
                    { "data": "surname" },
                    { "data": "status" },
                    { "data": "emailAddress" },
                    { "data" : "userId" }
                  ],
        "aoColumnDefs": [
           {
                "aTargets": [5],
                "mData": "userId",
                "mRender": function (data, type, full) {
                    return '<button href="#"' + 'id="'+ data + '">Edit</button>';
                }
            }
         ]
    } );

    $('#userTable tbody').on( 'click', 'button', function () {
        var data = table.row( $(this).parents('tr') ).data();
        console.log(data);
        $('#userEditModal').modal('show');
    });

} );