Use the main order route to show the order in /admin

admin/app/controllers/solidus_admin/line_items_controller.rb

@@ -8,7 +8,7 @@ def destroy
 
       @line_item.destroy!
 
-      redirect_to cart_order_path(@order), status: :see_other, notice: t('.success')
+      redirect_to order_path(@order), status: :see_other, notice: t('.success')
     end
 
     def create
@@ -17,7 +17,7 @@ def create
       @variant = Spree::Variant.find(variant_id)
       @line_item = @order.contents.add(@variant)
 
-      redirect_to cart_order_path(@order), status: :see_other, notice: t('.success')
+      redirect_to order_path(@order), status: :see_other, notice: t('.success')
     end
 
     def update
@@ -28,7 +28,7 @@ def update
 
       @line_item = @order.contents.add(@line_item.variant, desired_quantity - @line_item.quantity)
 
-      redirect_to cart_order_path(@order), status: :see_other, notice: t('.success')
+      redirect_to order_path(@order), status: :see_other, notice: t('.success')
     end
 
     private

admin/app/controllers/solidus_admin/orders_controller.rb

@@ -26,6 +26,10 @@ def show
       end
     end
 
+    def edit
+      redirect_to action: :show
+    end
+
     def variants_for
       load_order
 

admin/config/routes.rb

@@ -18,11 +18,10 @@
     get 'states', to: 'countries#states'
   end
 
-  resources :orders, only: [:index] do
+  resources :orders, only: [:index, :show, :edit] do
     resources :line_items, only: [:destroy, :create, :update]
 
     member do
-      get :cart, to: "orders#show"
       get :variants_for
     end
   end

admin/spec/features/order_spec.rb

@@ -11,7 +11,8 @@
       create(:product, name: "Just another product", slug: 'just-another-prod', price: 29.99)
       create(:order, number: "R123456789", total: 19.99, state: "cart")
 
-      visit "/admin/orders/R123456789/cart"
+      visit "/admin/orders/R123456789/edit"
+      expect(page).to have_current_path("/admin/orders/R123456789")
 
       expect(page).to have_content("Order R123456789")