Rails form action and routes

Question

I have a controller action that requires parameters, and has to be accessed both through get and post. with get it looks like:

get 'cart/add:id,:qty' => 'cart#add', as: :addToCart

the controller action is:

def add
 product = Product.find(params[:id])

 if ::AddToCart.new(@cart, product, params[:qty]).execute
   flash[:succes] = "Product(s) added."
 else
   flash[:failure] = "Product cannot be added."
 end  

 redirect_to request.referer
end

how should the post route look like if i would like it to use the same action.

PS: i use the get version as a link_to when only one product is added, the post route is needed because the quantity will be unknown

Answer 1

You should make this strictly a post route. If you want, you can default the quantity to one when it isn't provided. Or, use ajax to post to the route with a quantity of one when they click the "add one" link. That way it can look and seem to behave like a regular link_to sort of link, but you'll still have the benefits of only updating data via POST and leaving all your actual GET requests idempotent.