diff --git a/app/models/application_record.rb b/app/models/application_record.rb
index 12463bf97..b5e663a64 100644
--- a/app/models/application_record.rb
+++ b/app/models/application_record.rb
@@ -64,6 +64,16 @@ class ApplicationRecord < ActiveRecord::Base
         connection.execute("SET STATEMENT_TIMEOUT = #{CurrentUser.user.try(:statement_timeout) || 3_000}") unless Rails.env == "test"
       end
     end
+
+    %w(execute select_value select_values select_all).each do |method_name|
+      define_method("#{method_name}_sql") do |sql, *params|
+        self.class.connection.__send__(method_name, self.class.send(:sanitize_sql_array, [sql, *params]))
+      end
+
+      self.class.__send__(:define_method, "#{method_name}_sql") do |sql, *params|
+        connection.__send__(method_name, send(:sanitize_sql_array, [sql, *params]))
+      end
+    end
   end
 
   concerning :PostgresExtensions do
diff --git a/config/initializers/active_record_extensions.rb b/config/initializers/active_record_extensions.rb
deleted file mode 100644
index 55d46a950..000000000
--- a/config/initializers/active_record_extensions.rb
+++ /dev/null
@@ -1,25 +0,0 @@
-module Danbooru
-  module Extensions
-    module ActiveRecord
-      extend ActiveSupport::Concern
-
-      %w(execute select_value select_values select_all).each do |method_name|
-        define_method("#{method_name}_sql") do |sql, *params|
-          self.class.connection.__send__(method_name, self.class.sanitize_sql_array([sql, *params]))
-        end
-
-        self.class.__send__(:define_method, "#{method_name}_sql") do |sql, *params|
-          connection.__send__(method_name, sanitize_sql_array([sql, *params]))
-        end
-      end
-    end
-  end
-end
-
-class ActiveRecord::Base
-  class << self
-    public :sanitize_sql_array
-  end
-
-  include Danbooru::Extensions::ActiveRecord
-end