Add Columns

use DataTables;
 
Route::get('user-data', function() {
    $model = App\User::query();
 
    return DataTables::eloquent($model)
                ->addColumns(['foo','bar','buzz'=>"red"])
                ->toJson();
});

{
    "draw": 2,
    "recordsTotal": 10,
    "recordsFiltered": 3,
    "data": [{
        "id": 476,
        "name": "Esmeralda Kulas",
        "email": "[email protected]",
        "created_at": "2016-07-31 23:26:14",
        "updated_at": "2016-07-31 23:26:14",
        "deleted_at": null,
        "superior_id": 0,
        "foo":"value",
        "bar":"value",
        "buzz":"red"
    }, {
        "id": 6,
        "name": "Zachery Muller",
        "email": "[email protected]",
        "created_at": "2016-07-31 23:25:43",
        "updated_at": "2016-07-31 23:25:43",
        "deleted_at": null,
        "superior_id": 1,
        "foo":"value",
        "bar":"value",
        "buzz":"red"
    }]
}