ruby-on-rails-4 - Rails::MailersController#preview 中的 ArgumentError(参数数量错误(1 代表 0))

Question

我正在研究 Rails 教程的第 10 章。我已经跳过了帐户激活并实现了密码重置邮件程序。这是 user_mailer_preview.rb 的代码:

# Preview all emails at http://localhost:3000/rails/mailers/user_mailer
class UserMailerPreview < ActionMailer::Preview

  # Preview this email at
  # http://localhost:3000/rails/mailers/user_mailer/password_reset
  def password_reset
    user = User.first
    user.reset_token = User.new_token
    UserMailer.password_reset(user)
  end
end

这是用户邮件程序本身的代码:

class UserMailer < ActionMailer::Base
  default from: "<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="0d6b7f62604d68756c607d6168236e6260" rel="noreferrer noopener nofollow">[email protected]</a>"

  # Subject can be set in your I18n file at config/locales/en.yml
  # with the following lookup:
  #
  #   en.user_mailer.password_reset.subject
  #
  def password_reset
    @greeting = "Hi"

    mail to: "<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="53273c13362b323e233f367d3c2134" rel="noreferrer noopener nofollow">[email protected]</a>"
  end
end

当我访问http://localhost:3000/rails/mailers/user_mailer/password_reset时，我得到了

我做错了什么？

Answer 1

您正在调用UserMailer.password_reset(user)并传入用户

但是您的 password_reset 方法不接受参数。因此，您要么需要更改您的password_reset以获取用户(并用它做一些事情)

def password_reset(user)
   #do something with the user, such as send to their email address  
   @greeting = "Hi"
   mail to: user.email 
end

或者将您的调用调整为UserMailer.password_reset，无需用户。