search for: pricing_group

I am search for a nice tidy solution to the following or if only to talk the problem out aloud. I have three tables products has_many :pricings pricings belongs_to :product belongs_to :pricing_group pricing_groups had_many :pricings I would like to have a single page where I can add/edit a product and on the same page administer the pricing for that product for each pricing group. e.g. Cost, Retail, Wholesale. Initially I thought this would be fair easy but I have come unstuck. Firstly...