Like many I was excited about the named_scope stuff being rolled into Rails 2.1, but now that I try and go through and replace some of my self.find-like methods into named_scopes I am encountering a problem... how do I cache them?
I have a rather large dataset so I try and cache as much as possible. To that end I have this:
def self.global_lists ::Rails.cache.fetch("global_lists") { FilmList.find(:all, :conditions => ["user_id is null"])} end
Immediately I can see that I could write:
named_scope :global_lists_ns, :conditions => {:user_id => nil}
but, how can I cache this apart from wrapping it in a self. method and having now:
def self.global_lists ::Rails.cache.fetch("global_lists") { FilmList.global_lists_ns} end
Which means I have functionality in two places (arguably ok as I could use one to access the db and one to access the cache).
Any ideas? Or is this what it is supposed to be like?