Add action_cable to rails/all and application.rb

railties/lib/rails/all.rb

@@ -1,16 +1,17 @@
 require "rails"
 
 %w(
-  active_record
-  action_controller
-  action_view
-  action_mailer
-  active_job
-  rails/test_unit
-  sprockets
-).each do |framework|
+  active_record/railtie
+  action_controller/railtie
+  action_view/railtie
+  action_mailer/railtie
+  active_job/railtie
+  action_cable/engine
+  rails/test_unit/railtie
+  sprockets/railtie
+).each do |railtie|
   begin
-    require "#{framework}/railtie"
+    require "#{railtie}"
   rescue LoadError
   end
 end

railties/lib/rails/generators/rails/app/templates/config/application.rb

@@ -11,6 +11,7 @@
 require "action_controller/railtie"
 <%= comment_if :skip_action_mailer %>require "action_mailer/railtie"
 require "action_view/railtie"
+require "action_cable/engine"
 <%= comment_if :skip_sprockets %>require "sprockets/railtie"
 <%= comment_if :skip_test %>require "rails/test_unit/railtie"
 <% end -%>