Laravel validation - unique with were

I have to write validation rule that should verify if address is unique on rows where routing_id has given value. That is simple. But in some cases routing_id field may be NULL and then my validation request rule doesn't work.

Here is my rule:

$rules['address']   = 'required|ip|unique:vias,address'.\Route::current()->getParameter('via')->id.',id,routing_id,'.request()->input('routing_id'));

When I am patching row with null as routing_id in my POST array I want my address to be unique within all rows with nulled routing_id field. But it does not work.

And my question is: how to solve it?

from Newest questions tagged laravel-5 - Stack Overflow http://ift.tt/2tM2x5v
via IFTTT