Move moderator_for_tags Cache Key to Redis (#4690)

* Move moderator_for_tags cache key to Redis

* move delete commands for tag moderator list to Redis as well

app/labor/assign_tag_moderator.rb

@@ -17,7 +17,7 @@ module AssignTagModerator
   def self.add_tag_mod_role(user, tag)
     user.update(email_tag_mod_newsletter: true) if user.email_tag_mod_newsletter == false
     user.add_role(:tag_moderator, tag)
-    Rails.cache.delete("user-#{user.id}/tag_moderators_list")
+    RedisRailsCache.delete("user-#{user.id}/tag_moderators_list")
     MailchimpBot.new(user).manage_tag_moderator_list
   end
 
@@ -35,7 +35,7 @@ module AssignTagModerator
   def self.remove_tag_moderator(user, tag)
     user.remove_role(:tag_moderator, tag)
     user.update(email_tag_mod_newsletter: false) if user.email_tag_mod_newsletter == true
-    Rails.cache.delete("user-#{user.id}/tag_moderators_list")
+    RedisRailsCache.delete("user-#{user.id}/tag_moderators_list")
     MailchimpBot.new(user).manage_tag_moderator_list
   end
 end

app/models/user.rb

@@ -337,7 +337,7 @@ class User < ApplicationRecord
   end
 
   def moderator_for_tags
-    Rails.cache.fetch("user-#{id}/tag_moderators_list", expires_in: 200.hours) do
+    RedisRailsCache.fetch("user-#{id}/tag_moderators_list", expires_in: 200.hours) do
       tag_ids = roles.where(name: "tag_moderator").pluck(:resource_id)
       Tag.where(id: tag_ids).pluck(:name)
     end