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?