[Rails Notes] Doubly polymorphic has_many: :through association [Rails Notes] Doubly polymorphic has_many: :through association By Sky Xu | April 7, 2019 Double-ended polymorphic has_many: :through association in Ruby on Rails. Share Print (Opens in new window) Print Share on Facebook (Opens in new window) Facebook Share on LinkedIn (Opens in new window) LinkedIn Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Share on Tumblr (Opens in new window) Tumblr Share on Pinterest (Opens in new window) Pinterest Share on Pocket (Opens in new window) Pocket Share on Telegram (Opens in new window) Telegram Share on WhatsApp (Opens in new window) WhatsApp