[Rails] Re: Only get published items

I would take advantage of arel's method chaining and break down the
problem into smaller chunks. Instead of using true scopes, I'd create
some useful class methods like so:

class Song < ActiveRecord::Base

def self.published
where(:published => true)
end

def self.approved
where(:approved => true)
end

end

Then in your controllers, call the class methods to match whatever
special conditions you need on your song collection (or none at all
in, admin's case):

songs_controller:
@songs = Song.published.approved

admin_controller:
@songs = Song.all

Related reading:
http://www.railway.at/2010/03/09/named-scopes-are-dead/
http://elabs.se/blog/24-scopes-are-obsolete

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