polymorphic assoc with a sti class issue fixed
polymorphic assoc with a sti class issue fixed

http://stackoverflow.com/questions/9628610/why-polymorphic-association-doesnt-work-for-sti-if-type-column-of-the-polymorph

vijaysali/spree_active_sale,redglory/spree_active_sale,tcjuan/spree-active-sale,gardixon/spree_active_sale,gardixon/spree_active_sale,redglory/spree_active_sale,suryart/spree_active_sale