How can I include the delivery_schedule attribute in this? format.json { render :json => @campaign.to_json(:include => {:category => {:include => :subscriptions}}, :methods => :status) } I tried this but I get an error: format.json { render :json => @campaign.to_json(:include => [{:category => {:include => :subscriptions}}, :delivery_schedule], :methods => :status) } NoMethodError (You have a nil object when you didn''t expect it! The error occurred while evaluating nil.macro): /vendor/rails/activerecord/lib/active_record/serialization.rb: 55:in `add_includes'' Note: this works (I removed the category.subscriptions include): format.json { render :json => @campaign.to_json(:include => [:category, :delivery_schedule], :methods => :status) } Is there something wrong with my nesting? --~--~---------~--~----~------------~-------~--~----~ 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-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---