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http://stackoverflow.com/questions/2224994/why-are-double-sided-polymorphic-relationships-lacking-in-rails -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to

...he plugin): http://github.com/dedomenon/madb_notifications/blob/master/lib/madb_notifications_lib.rb#L8 Entity.class_eval do def user_subscribed_to_creation?(user_id) NotificationSubscription.find(:first, :conditions => [ "source_filter = ? AND event = ? and source_type = ? and destination_type = ? and destination = ?", {:entity_id => self.id}.to_yaml , "after_create", "Instance", "user", user_id.to_s ]) end end and this is then used in a view of the plugin, where @entity is an instance of the model Entity: http://github.com/dedomenon/madb_no...