# 修改 config/environments/production.rb # 找到config.consider_all_requests_local

	config.consider_all_requests_local = true # 預設是false

重開web server，就完成啦！

How to showing error message on web just time in production mode, like in development mode?

in config/environments/production.rb

# find “config.consider_all_requests_local” config.consider_all_requests_local = true # default is false

restart web server, and you’re done