Merge pull request #2802 from evazion/fix-pool-archives-db

Fix "'archive_development' database is not configured." exception.

app/models/pool_archive.rb

@@ -1,5 +1,9 @@
 class PoolArchive < ActiveRecord::Base
-  establish_connection "archive_#{Rails.env}".to_sym
+  def self.enabled?
+    Danbooru.config.aws_sqs_archives_url.present?
+  end
+
+  establish_connection "archive_#{Rails.env}".to_sym if enabled?
   self.table_name = "pool_versions"
 
   module SearchMethods
@@ -29,10 +33,6 @@ class PoolArchive < ActiveRecord::Base
 
   extend SearchMethods
 
-  def self.enabled?
-    Danbooru.config.aws_sqs_archives_url.present?
-  end
-
   def self.sqs_service
     SqsService.new(Danbooru.config.aws_sqs_archives_url)
   end