It might also be helpful to see my store_controller.rb file:
class StoreController < ApplicationController
def index
@products = Product.find_products_for_sale
end
def add_to_cart
@cart = find_cart
product = Product.find(params[:id])
@cart.add_product(product)
end
private
def find_cart
session[:cart] ||=Cart.new
end
end
If I am reading the trace right (which I don't know that I am) I think
the problem is on the @cart.add_product(product) line?
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