On 5 March 2017 at 19:03, Joe Guerra <jgue...@jginfosys.com> wrote: > it is set up in the private section > > def set_product > @product = Product.find(params[:id]) > end > > > and I can see it in my show method... > > > How do I get to see it in my > > > def calc_remaining > @taken = Cart.where('product_id' => @product).count > @remaining = @product.qty - @taken > end > > method?
Presumably you know which product you are talking about in that method, that is what it should be. Colin > > > > > On Sunday, March 5, 2017 at 1:57:39 PM UTC-5, James Jelinek wrote: >> >> You’re getting no method error “qty” because @product is not set in your >> controller action. So you’re essentially trying to subtract @taken from >> something that is NIL. >> >> You need to see @product as an instance variable in your specific >> controller method and this should work out for you. >> >> -James >> >> On Mar 5, 2017, at 12:23 PM, Joe Guerra <jgu...@jginfosys.com> wrote: >> >> ok, here's my method... >> >> 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. >> >> >> >> >> On Thursday, March 2, 2017 at 11:07:06 AM UTC-5, Joe Guerra wrote: >>> >>> In my show method for my products controller I've got a variable that >>> track qty ( @remaining ). >>> >>> Can I access this variable from another method within the same >>> controller? >>> >>> Thanks, >>> Joe >> >> >> -- >> 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 rubyonrails-ta...@googlegroups.com. >> To post to this group, send email to rubyonra...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/rubyonrails-talk/14870fab-2fc6-421f-9e1c-677a2001dac5%40googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> >> > -- > 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 rubyonrails-talk+unsubscr...@googlegroups.com. > To post to this group, send email to rubyonrails-talk@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/rubyonrails-talk/4cc4e498-17bc-46db-aba3-ec58db1fd918%40googlegroups.com. > > For more options, visit https://groups.google.com/d/optout. -- 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 rubyonrails-talk+unsubscr...@googlegroups.com. To post to this group, send email to rubyonrails-talk@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/CAL%3D0gLtAc%2BCj5x7aD3fSy-3WMwF1qG5NQNKWte9N%3DwyS%2B8n24A%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.