Rails设计邮件

Question

我试图覆盖设计,以发送邮件来激活用户.在注册控制器的创建方法中我有这个

urlEmail = resource.email.sub('@','-')
Pony.mail(
    :to => resource.email,
    :from => "noreply@mysite.com",
    :subject => "Confirm Account",
    :headers => { 'Content-Type' => 'text/html' },
    :body => ("<h1>Welcome To My Awesome Site</h1>
              <p>follow this link to create your account</p>
              <p>http://localhost:3000/confirm-me/stuff?=" + resource.confirmhash.to_s + "/" + urlEmail.to_s  + "</p>") )

该URL导致激活用户的方法.这是否是确认帐户的好方法.问题是当Pony.mail(...)运行时我得到这个错误

uninitialized constant RegistrationsController::Pony

我安装了pony,Pony.mail在控制台中工作.我也尝试在控制器文件的顶部使用require'pony',但我得到了

no such file to load -- pony

我需要做些什么来完成这项工作.