Better LogSubscriber monkey-patch using Thread.current

kaminari-actionview/lib/kaminari/actionview/action_view_extension.rb

@@ -6,46 +6,19 @@ require 'action_view/context'
 module Kaminari
   # = Helpers
   module ActionViewExtension
-    module PaginatorExtension
+    # Monkey-patching AV::LogSubscriber not to log each render_partial
-      extend ActiveSupport::Concern
+    module LogSubscriberSilencer
+      def render_partial(*)
+        super unless Thread.current[:kaminari_rendering]
+      end
+    end
 
+    module PaginatorExtension
       # so that this instance can actually "render"
       include ::ActionView::Context
-
-      included do
-        undef :to_s
-        # Redefining to_s not to log each render_partial
-        def to_s #:nodoc:
-          subscriber = ::ActionView::LogSubscriber.log_subscribers.detect {|ls| ls.is_a? ::ActionView::LogSubscriber}
-
-          # There is a logging subscriber
-          # and we don't want it to log render_partial
-          # It is threadsafe, but might not repress logging
-          # consistently in a high-load environment
-          if subscriber
-            unless defined? subscriber.render_partial_with_logging
-              class << subscriber
-                alias_method :render_partial_with_logging, :render_partial
-                attr_accessor :render_without_logging
-                # ugly hack to make a renderer where
-                # we can turn logging on or off
-                def render_partial(event)
-                  render_partial_with_logging(event) unless render_without_logging
-                end
-              end
-            end
-
-            subscriber.render_without_logging = true
-            ret = super @window_options.merge paginator: self
-            subscriber.render_without_logging = false
-
-            ret
-          else
-            super @window_options.merge paginator: self
-          end
-        end
-      end
     end
     ::Kaminari::Helpers::Paginator.send :include, PaginatorExtension
   end
 end
+
+ActionView::LogSubscriber.send :prepend, Kaminari::ActionViewExtension::LogSubscriberSilencer

kaminari-core/lib/kaminari/helpers/paginator.rb

@@ -76,7 +76,10 @@ module Kaminari
       end
 
       def to_s #:nodoc:
+        Thread.current[:kaminari_rendering] = true
         super @window_options.merge paginator: self
+      ensure
+        Thread.current[:kaminari_rendering] = false
       end
 
       # delegates view helper methods to @template