JSONApi part1

app/controllers/users/orders_controller.rb

@@ -2,6 +2,15 @@ module Users
   class OrdersController < Users::ApplicationController
     respond_to :json
 
+    # /nested resource
+    def index
+      render json: {}, status: :not_found and return unless params[:list_id].present?
+      @list = List.find(params[:list_id])
+      render json: {}, status: :not_found and return unless @list.present? && Array.wrap(@list.user_ids).include?(current_user.id)
+      orders = @list.orders.include_relation(:product_orders)
+      render json: orders, each_serializer: Users::OrderSerializer, include: %w[product_orders]
+    end
+
     # Used by the user Ember app
     # POST /user/orders
     def create
@@ -25,7 +34,7 @@ module Users
         list = List.from_table( table, current_user )
       end
       order = list.place_order product_orders: params[:product_orders], user: current_user
-      render json: order, serializer: OrderSerializer
+      render json: order, serializer: Users::OrderSerializer
       #render nothing: true
     end
   end