Add guards in boot#start

Author: zlw

lib/dry/rails/boot/controller_helpers.rb

@@ -6,9 +6,12 @@
   end
 
   start do
-    ApplicationController.include(Dry::Rails::Features::ControllerHelpers)
+    unless ApplicationController.include?(Dry::Rails::Features::ControllerHelpers)
+      ApplicationController.include(Dry::Rails::Features::ControllerHelpers)
+    end
 
-    if defined?(ActionController::API)
+    if defined?(ActionController::API) &&
+       !ActionController::API.include?(Dry::Rails::Features::ControllerHelpers)
       ActionController::API.include(Dry::Rails::Features::ControllerHelpers)
     end
   end

lib/dry/rails/boot/safe_params.rb

@@ -6,9 +6,12 @@
   end
 
   start do
-    ActionController::Base.include(Dry::Rails::Features::SafeParams)
+    unless ActionController::Base.include?(Dry::Rails::Features::SafeParams)
+      ActionController::Base.include(Dry::Rails::Features::SafeParams)
+    end
 
-    if defined?(ActionController::API)
+    if defined?(ActionController::API) &&
+       !ActionController::API.include?(Dry::Rails::Features::SafeParams)
       ActionController::API.include(Dry::Rails::Features::SafeParams)
     end
   end