Order by NULLS LAST

This api will set DataTables to perform ordering with NULLS LAST option.

use DataTables;

Route::get('user-data', function() {
    $model = App\User::query();

    return DataTables::eloquent($model)
            ->orderByNullsLast()
            ->toJson();
});

You must update nulls_last_sql config and use a pattern that matches your DB Driver.