警告:安装tlsmail gem后已经初始化了常量？

Question

在我将tlsmail 用于电子邮件传递的gem安装到我的gmail帐户后,每次运行rake命令时这些错误都会出现:

c:/Ruby192/lib/ruby/gems/1.9.1/gems/tlsmail-0.0.1/lib/net/smtp.rb:806: warning: already initialized constant SMTPSession
c:/Ruby192/lib/ruby/gems/1.9.1/gems/tlsmail-0.0.1/lib/net/pop.rb:687: warning: already initialized constant POP
c:/Ruby192/lib/ruby/gems/1.9.1/gems/tlsmail-0.0.1/lib/net/pop.rb:688: warning: already initialized constant POPSession
c:/Ruby192/lib/ruby/gems/1.9.1/gems/tlsmail-0.0.1/lib/net/pop.rb:689: warning: already initialized constant POP3Session
c:/Ruby192/lib/ruby/gems/1.9.1/gems/tlsmail-0.0.1/lib/net/pop.rb:702: warning: already initialized constant APOPSession

我怎样才能摆脱这些警告？

---

gem 'rails', '3.0.10'
gem "rake", "0.8.7"
gem "pg", "0.12.0"
gem "cancan", "1.6.7"
gem "geocoder", "1.0.5"
gem "will_paginate", "3.0.2"
gem "rails3-jquery-autocomplete"
gem "jquery-rails", "1.0.19"
gem "dynamic_form", "1.1.4"
gem "devise", "1.5.3"
gem "thin", "1.3.1"
gem 'sunspot_rails', '1.2.1'
gem "tlsmail"

Answer 1

如果您不想修改gem,请尝试以下方法:

require 'net/smtp'
Net.instance_eval {remove_const :SMTPSession} if defined?(Net::SMTPSession)

require 'net/pop'
Net::POP.instance_eval {remove_const :Revision} if defined?(Net::POP::Revision)
Net.instance_eval {remove_const :POP} if defined?(Net::POP)
Net.instance_eval {remove_const :POPSession} if defined?(Net::POPSession)
Net.instance_eval {remove_const :POP3Session} if defined?(Net::POP3Session)
Net.instance_eval {remove_const :APOPSession} if defined?(Net::APOPSession)

require 'tlsmail'

预加载net/smtp和net/popgems并杀死常量可以防止tlsmail尝试加载和写入常量.这是一个肮脏,污秽的黑客......但它的确有效!

(Ruby 1.9.2,tlsmail 0.0.1)