Need a hand in Routing in rails - ruby-on-rails

Question

I'm trying to call a certain method "custom" in a controller called orders_controller.rb
but there is an error in my routing which is this
No route matches {:action=>"custom", :controller=>"orders"} missing required keys: [:id, :id]
this is my routes.rb file
Rails.application.routes.draw do
resources :categories
devise_for :users,:controllers => { :registrations => "registrations" }
resources :products
resource :cart, only: [:show] do
post "add", path: "add/:id",on: :member
get :checkout
end
resource :results, only: [:index] do
get :index
end
resources :comments
resource :home, only: [:index] do
get :index
end
resources :orders, only:[:show,:index,:create] do
post "custom", path: "custom/:id",on: :member
end
# For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
get 'results/index'
get 'comments/index'
root 'home#index'
end
and this is my orders_controller.rb
class OrdersController < ApplicationController
before_filter :initialize_cart
def create
#order_form=OrderForm.new(user: User.new(order_params[:user]),cart: #cart)
if #order_form.save
redirect_to products_path,notice:"Thank You for placing the order sir."
else
render "carts/checkout"
end
end
def custom
#order_form=OrderForm.new(user: current_user,cart: #cart)
if #order_form.save
redirect_to products_path,notice:"Thank You for placing the order sir."
else
render "carts/checkout"
end
end
private
def notify_user
OrderMailer.order_confirmation(#order_form.order).deliver
end
def order_params
params.require(:order_form).permit(
user:[:name,:phone,:address,:city,:country,:postal_code,:email])
end
end
in this i want to call the custom method when i click the place order button but i cant click it because the page is not opening
this is my main code of the page in views/cart/checkout.html.erb
<%if current_user %>
<%= button_to 'Place order',custom_order_path,:class => "btn btn-success btn-lg" %>
<%else%>
<div style="width:70%;margin:20px auto;">
<%=render "errors"%>
<%=render "form"%>
<%end%>
can someone tell me what is the routing error in this

Answer 1

You need to change route to collection_route as you are creating order.
resources :orders, only: [:show, :index, :create] do
post :custom, on: :collection
end
and now you can use
<%= button_to 'Place order',custom_order_path, :class => "btn btn-success btn-lg" %>