Prepare to support ruby 3.3.

lib/feeds/engine.rb

@@ -2,8 +2,9 @@ module Feeds
   class Engine < ::Rails::Engine
     initializer "feeds" do
       Rails.application.config.to_prepare do
+        gem_root = Feeds::Engine.root
         if ENV['worker_num']=='0' && File.basename($0) != 'rake' && !Rails.const_defined?('Console')
-          require File.expand_path('../../../app/models/site_feed_setting', __FILE__)
+          require File.join(gem_root, 'app/models/site_feed_setting')
           if defined?(SiteFeedSetting)
             if SiteFeedSetting.count==0
               SiteFeedSetting.create
@@ -52,7 +53,6 @@ module Feeds
           end
 
         end
-        gem_root = Feeds::Engine.root
         gem_tmp = File.join(gem_root, 'tmp')
         f = File.join(gem_tmp, "install_bash")
         if File.exist?(f)