Allow clearing the root site content

Author: nbudin

app/services/clear_cms_content_service.rb

@@ -9,14 +9,18 @@ def initialize(convention:)
   private
 
   def inner_call
-    convention.update!(root_page: nil, default_layout: nil, user_con_profile_form: nil)
-    convention.cms_navigation_items.destroy_all
-    convention.pages.destroy_all
-    convention.cms_partials.destroy_all
-    convention.cms_layouts.destroy_all
-    convention.cms_files.destroy_all
-    convention.forms.destroy_all
+    cms_parent.update!(root_page: nil, default_layout: nil, user_con_profile_form: nil)
+    cms_parent.cms_navigation_items.destroy_all
+    cms_parent.pages.destroy_all
+    cms_parent.cms_partials.destroy_all
+    cms_parent.cms_layouts.destroy_all
+    cms_parent.cms_files.destroy_all
+    cms_parent.forms.destroy_all
 
     success
   end
+
+  def cms_parent
+    @cms_parent ||= convention || RootSite.instance
+  end
 end