So all Sellers are Users, Users can be Sellers in this marketplace model. Should Seller be on top and inherit to User or the other way round? I found it weird when doing a Session login, I've to call *Seller.has_sold?* even though all they are all Users to begin with, but I can't call *User.has_sold?* since the method is not in User.rb. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/7388fdfd-4c78-43bc-9685-26794733a8c2%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.