ruby on rails 3 - polymorphic association with formtastic and mongo -


i'm trying create relationship between 2 models in rails.

i have product , offer offer belongs product. 

 class product   include mongoid::document   include mongoid::timestamps      has_many :offers, as: :trigger_product, :class_name => "offer"  end  class offer   include mongoid::document   include mongoid::timestamps      belongs_to :trigger_product, polymorphic: true     accepts_nested_attributes_for :images, :product end

in formtastic, field trigger product added so

  <%= f.input :trigger_product, :as=> :select, :multiple => false, :collection => @offer.trigger_products_list %>

when submit form, error

  nameerror in admin::offerscontroller#create  uninitialized constant triggerproduct  app/controllers/admin/offers_controller.rb:7:in `create'

it appears me polymorphic association isn't working, don't think should need create empty model hold triggerproduct, error leads me believe issue.

any suggestions here?

turns out had relationship needing know of product_type value, product parent of many product types.

no way here @ have gotten , rails error didn't point in right direction.

if knows how might have debugged maybe way output required fields relationship expecting, i'll give points.


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