FEATURE: reset active record cache in sidekiq if needed

This can happen in multisite environments after restores

app/controllers/application_controller.rb

@@ -111,29 +111,8 @@ class ApplicationController < ActionController::Base
     end
   end
 
-  def self.last_ar_cache_reset
-    @last_ar_cache_reset
-  end
-
-  def self.last_ar_cache_reset=(val)
-    @last_ar_cache_reset
-  end
-
   rescue_from ActiveRecord::StatementInvalid do |e|
-
-    last_cache_reset = ApplicationController.last_ar_cache_reset
-
-    if e.message =~ /UndefinedColumn/ && (last_cache_reset.nil?  || last_cache_reset < 30.seconds.ago)
-      Rails.logger.warn "Clear Active Record cache cause schema appears to have changed!"
-
-      ApplicationController.last_ar_cache_reset = Time.zone.now
-
-      ActiveRecord::Base.connection.query_cache.clear
-      (ActiveRecord::Base.connection.tables - %w[schema_migrations]).each do |table|
-        table.classify.constantize.reset_column_information rescue nil
-      end
-    end
-
+    Discourse.reset_active_record_cache_if_needed(e)
     raise e
   end
 

config/initializers/100-sidekiq.rb

@@ -49,6 +49,7 @@ class SidekiqLogsterReporter < Sidekiq::ExceptionHandler::Logger
   def call(ex, context = {})
 
     return if Jobs::HandledExceptionWrapper === ex
+    Discourse.reset_active_record_cache_if_needed(ex)
 
     # Pass context to Logster
     fake_env = {}

lib/discourse.rb

@@ -392,4 +392,24 @@ module Discourse
     [SiteSetting.tos_topic_id, SiteSetting.guidelines_topic_id, SiteSetting.privacy_topic_id]
   end
 
+  cattr_accessor :last_ar_cache_reset
+
+  def self.reset_active_record_cache_if_needed(e)
+    last_cache_reset = Discourse.last_ar_cache_reset
+    if e && e.message =~ /UndefinedColumn/ && (last_cache_reset.nil?  || last_cache_reset < 30.seconds.ago)
+      Rails.logger.warn "Clear Active Record cache cause schema appears to have changed!"
+      Discourse.last_ar_cache_reset = Time.zone.now
+      Discourse.reset_active_record_cache
+    end
+  end
+
+  def self.reset_active_record_cache
+    ActiveRecord::Base.connection.query_cache.clear
+    (ActiveRecord::Base.connection.tables - %w[schema_migrations]).each do |table|
+      table.classify.constantize.reset_column_information rescue nil
+    end
+    nil
+  end
+
+
 end