Search not working when using editColumn

[cooperinho]

I edited my column data like so:

public function dataTable($query)
{
    return datatables()
    ->eloquent($query)
    ->editColumn('item_information', function (Item $item) {
                $user_id= $item['user_id'];
                $user_name = User::find($user_id)->user_name;
                return $item->id. " (" . $user_name. ")";
    })

Now if the cells has for example data "3 (some user)" and I search for "some user", I get "No matching records found". But for other columns everything works.