Update responses to use cable_ready

app/controllers/split_checkout_controller.rb

@@ -8,6 +8,7 @@ class SplitCheckoutController < ::BaseController
   include OrderStockCheck
   include Spree::BaseHelper
   include CheckoutCallbacks
+  include CableReady::Broadcaster
 
   helper 'terms_and_conditions'
   helper 'checkout'
@@ -25,7 +26,10 @@ class SplitCheckoutController < ::BaseController
       redirect_to_step
     else
       flash.now[:error] = I18n.t('split_checkout.errors.global')
-      render :edit, status: :unprocessable_entity
+
+      render operations: cable_car.replace(
+        selector: "#checkout", html: render_to_string(partial: "split_checkout/checkout", formats: [:html])
+      ), status: :unprocessable_entity
     end
   end
 

app/views/split_checkout/_checkout.html.haml

@@ -0,0 +1,4 @@
+%checkout.row#checkout
+  .small-12.medium-12.columns
+  = render partial: "split_checkout/tabs"
+  = render partial: "split_checkout/form"

app/views/split_checkout/edit.html.haml

@@ -19,10 +19,6 @@
   .sub-header.show-for-medium-down
     = render partial: "shopping_shared/order_cycles"
 
-  %checkout.row
-    .small-12.medium-12.columns
-      = render partial: "split_checkout/tabs"
-      = render partial: "split_checkout/form"
-
+  = render partial: "checkout"
 
 = render partial: "shared/footer"