Update quantity

rubyonrails-talk
1

Hi,

I added a field to my cart that allows you to update the quantity of the item but when I try to update the quantity I get an error:

NoMethodError in CartController#update undefined method `update_attribute' for #<Array:0x3464698>

app/models/cart.rb:33:in `update' app/controllers/cart_controller.rb:53:in `update' Request Parameters: {"qty_update"=>"3", "id"=>"2"}

2

cart_items.find_all_by_product_id(product_id)

will certainly return an array, not a cart item object… you might use

cart_items.find_all_by_product_id(product_id).first

bye

3

will certainly return an array, not a cart item object... you might use cart_items.find_all_by_product_id(product_id).first

When I changed that, I now get this error:

NameError in CartController#update undefined local variable or method `product' for #<CartController: 0x31795c8>

app/controllers/cart_controller.rb:54:in `update' Request Parameters: {"qty_update"=>"4", "id"=>"2"}

My cart_controller.rb is: 49 def update 50 @product = Product.find(params[:id]) 51 qty_update = params[:qty_update] 52 if request.post? 53 @cart.update(params[:id], qty_update) 54 flash[:notice] = "Updated <em>#{product.title}</em>" 55 redirect_to :action => "view_cart" 56 end 57 end

Any ideas?

TIA, Elle

4

Actually, changing it from @product to product and then changing this line: @cart.update(product, qty_update) -- fixed it :slight_smile:

Thanks. Elle