Can I reuse part of a controller action across all http verb/method actions in RoR?
===

Imagine a resource: `/users/14/notifications`. It implements several HTTP verbs/methods: GET, GET/edit, POST, DELETE.

All 4 actions share a small part of logic: retrieve all notifications, create some hash for easy access, fetch some specific user access from somewhere else to do something special etc. Just a few loc (let's say 7).

How can I reuse those 7 loc to keep the logic DRY? I've heard about Rails' ANY verb, but I have no idea how to use it. Also no idea how to use its result (a few vars) in the 4 actual actions.

I would expect something like:

    def any
      @notifications = Notification.find_by etc...
      // do something here to create
      @reverse_notifications_hash = ...
      // and something else
      @super_special_access = ...
    end
    
    def show
      // Only specific logic here
      // Render using @notifications
    end
    
    def edit
      // Only specific logic here
      // Render form using @notifications,
      // @reverse_notifications_hash and
      // @super_special_access
    end
    
    def update 
      // Only specific logic here
      // Fetch something else special to not override stuff or be extra efficient
      more_special = ...
      // Do update stuff with @notifications, @super_special_access and more_special
    end

As you might have noticed, I'm not a pro Ruby/Railser. (The syntax might even be wrong.) I am very curious though.

How would it actually work in RoR?
