/moderator/dashboard: fix post version reference.

app/logical/moderator/dashboard/queries/tag.rb

@@ -5,26 +5,17 @@ module Moderator
         attr_reader :user, :count
 
         def self.all(min_date, max_level)
-          sql = <<-EOS
-            SELECT post_versions.updater_id, count(*)
-            FROM post_versions
-            JOIN users ON users.id = post_versions.updater_id
-            WHERE
-              post_versions.updated_at > ?
-              AND users.level <= ?
-            GROUP BY post_versions.updater_id
-            ORDER BY count(*) DESC
-            LIMIT 10
-          EOS
+          return unless PostArchive.enabled?
 
-          ActiveRecord::Base.without_timeout do
-            ActiveRecord::Base.select_all_sql(sql, min_date, max_level).map {|x| new(x)}
+          records = PostArchive.where("updated_at > ?", min_date).group(:updater).count.map do |user, count|
+            new(user, count)
           end
+
+          records.select { |rec| rec.user.level <= max_level }.sort_by(&:count).reverse.take(10)
         end
 
-        def initialize(hash)
-          @user = ::User.find(hash["updater_id"])
-          @count = hash["count"]
+        def initialize(user, count)
+          @user, @count = user, count
         end
       end
     end