/pool_versions: fix N+1 query problems.

app/controllers/pool_versions_controller.rb

@@ -8,7 +8,7 @@ class PoolVersionsController < ApplicationController
       @pool = Pool.find(params[:search][:pool_id])
     end
 
-    @pool_versions = PoolArchive.paginated_search(params)
+    @pool_versions = PoolArchive.paginated_search(params).includes(:updater, :pool)
     respond_with(@pool_versions)
   end
 

app/models/pool_archive.rb

@@ -1,5 +1,6 @@
 class PoolArchive < ApplicationRecord
   belongs_to :updater, :class_name => "User"
+  belongs_to :pool
 
   def self.enabled?
     Danbooru.config.aws_sqs_archives_url.present?
@@ -110,14 +111,6 @@ class PoolArchive < ApplicationRecord
     PoolArchive.where("pool_id = ? and version < ?", pool_id, version).order("version desc").first
   end
 
-  def pool
-    Pool.find(pool_id)
-  end
-
-  def updater
-    User.find(updater_id)
-  end
-
   def pretty_name
     name.tr("_", " ")
   end