保持登录问题：

app/controllers/application_controller.rb

@@ -357,6 +357,7 @@ class ApplicationController < ActionController::Base
   end
 
   def require_login
+    logger.info("#########login?: #{User.current.id}")
     logger.info("#########login?: #{User.current.logged?}")
     logger.info("#########get?: #{request.get?}")
     if !User.current.logged?

config/initializers/session_store.rb

@@ -1 +1 @@
-Rails.application.config.session_store ActionDispatch::Session::CacheStore, :expire_after => 8.hours, :key => '_educoder_session', :domain => :all
+Rails.application.config.session_store ActionDispatch::Session::CacheStore, :expire_after => 24.hours, :key => '_educoder_session', :domain => :all