Iteration F5. Tests with errors.

app/assets/javascripts/channels/products.coffee

@@ -0,0 +1,10 @@
+App.products = App.cable.subscriptions.create "ProductsChannel",
+  connected: ->
+    # Called when the subscription is ready for use on the server
+
+  disconnected: ->
+    # Called when the subscription has been terminated by the server
+
+  received: (data) ->
+    # Called when there's incoming data on the websocket for this channel
+    $('.store #main').html(data.html)

app/channels/products_channel.rb

@@ -0,0 +1,11 @@
+# Be sure to restart your server when you modify this file. Action Cable runs in a loop that does not support auto reloading.
+class ProductsChannel < ApplicationCable::Channel
+  def subscribed
+    # stream_from "some_channel"
+    stream_from "products"
+  end
+
+  def unsubscribed
+    # Any cleanup needed when channel is unsubscribed
+  end
+end

app/controllers/products_controller.rb

@@ -44,6 +44,10 @@ class ProductsController < ApplicationController
       if @product.update(product_params)
         format.html { redirect_to @product, notice: 'Product was successfully updated.' }
         format.json { render :show, status: :ok, location: @product }
+
+        @products = Product.all
+        ActionCable.server.broadcast 'products',
+          html: render_to_string('store/index', layout: false)
       else
         format.html { render :edit }
         format.json { render json: @product.errors, status: :unprocessable_entity }