Ruby on Rails Sunday, March 5, 2017

On Sun, Mar 5, 2017 at 10:23 AM, Joe Guerra <> wrote:

> def calc_remaining
> @taken = Cart.where('product_id' => @product).count
> @remaining = @product.qty - @taken
> end

> but when I call it from my add to cart method, @product.qty is undefined
> method `qty' for nil:NilClass.

And that tells you that @product is nil at that point. Where is the code
that sets that variable?

Hassan Schroeder ------------------------
twitter: @hassan
Consulting Availability : Silicon Valley or remote

You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group.
To unsubscribe from this group and stop receiving emails from it, send an email to
To post to this group, send email to
To view this discussion on the web visit
For more options, visit

No comments:

Post a Comment