diff --git a/app/models/application_record.rb b/app/models/application_record.rb
index 10a4cba84..d0bdfc17e 100644
--- a/app/models/application_record.rb
+++ b/app/models/application_record.rb
@@ -1,3 +1,47 @@
 class ApplicationRecord < ActiveRecord::Base
   self.abstract_class = true
+
+  module ApiMethods
+    extend ActiveSupport::Concern
+
+    def as_json(options = {})
+      options ||= {}
+      options[:except] ||= []
+      options[:except] += hidden_attributes
+
+      options[:methods] ||= []
+      options[:methods] += method_attributes
+
+      super(options)
+    end
+
+    def to_xml(options = {}, &block)
+      options ||= {}
+
+      options[:except] ||= []
+      options[:except] += hidden_attributes
+
+      options[:methods] ||= []
+      options[:methods] += method_attributes
+
+      super(options, &block)
+    end
+
+    def serializable_hash(*args)
+      hash = super(*args)
+      hash.transform_keys { |key| key.delete("?") }
+    end
+
+    protected
+
+    def hidden_attributes
+      [:uploader_ip_addr, :updater_ip_addr, :creator_ip_addr, :ip_addr]
+    end
+
+    def method_attributes
+      []
+    end
+  end
+
+  include ApiMethods
 end
diff --git a/config/initializers/active_record_api_extensions.rb b/config/initializers/active_record_api_extensions.rb
index b258e8297..5c88773d3 100644
--- a/config/initializers/active_record_api_extensions.rb
+++ b/config/initializers/active_record_api_extensions.rb
@@ -1,54 +1,5 @@
-module Danbooru
-  module Extensions
-    module ActiveRecordApi
-      extend ActiveSupport::Concern
-
-      def as_json(options = {})
-        options ||= {}
-        options[:except] ||= []
-        options[:except] += hidden_attributes
-
-        options[:methods] ||= []
-        options[:methods] += method_attributes
-
-        super(options)
-      end
-
-      def to_xml(options = {}, &block)
-        options ||= {}
-
-        options[:except] ||= []
-        options[:except] += hidden_attributes
-
-        options[:methods] ||= []
-        options[:methods] += method_attributes
-
-        super(options, &block)
-      end
-
-      def serializable_hash(*args)
-        hash = super(*args)
-        hash.transform_keys { |key| key.delete("?") }
-      end
-
-    protected
-      def hidden_attributes
-        [:uploader_ip_addr, :updater_ip_addr, :creator_ip_addr, :ip_addr]
-      end
-
-      def method_attributes
-        []
-      end
-    end
-  end
-end
-
 class Delayed::Job
   def hidden_attributes
     [:handler]
   end
 end
-
-class ActiveRecord::Base
-  include Danbooru::Extensions::ActiveRecordApi
-end