Should this be middleware?

I have two fields in almost every table of my DB, they are created_by and modified_by. So, right now I have this in my controller:

$request['created_by'] = Auth::user->id;
$request['modified_by'] = Auth::user->id;

I was thinking that I should turn this into middleware or something a little more RESTful but I don't know how I would go about this. It is being used in 100% of my store methods right now, but it's possible that down the road I will have a table that doesn't have these two fields, which is where I get confused.

via Chebli Mohamed