ActionMailer：未定义的方法“收件人”

Question

我正在 Rails 3.2 上为我的一个 ActionMailer - InvitationMailer 编写测试，但是，它似乎没有找到“收件人”方法。

我的测试如下所示：

  describe "Invitation" do
    it "should send invitation email to user" do
    user = Factory :user

    email = InvitationMailer.invitation_email(user).deliver
    # Send the email, then test that it got queued
    assert !ActionMailer::Base.deliveries.empty?

    # Test the body of the sent email contains what we expect it to
    assert_equal [user.email], email.to
    assert_equal "You have been Invited!", email.subject

    end

我的 InvitationMailer 如下所示：

class InvitationMailer < ActionMailer::Base
  default from: "webmaster@myapp.com"

  def invitation_email(user)
    recipients  user.email
    from        "invitations@myapp.com"
    subject     "You have been Invited!"
    body        :user => user
  end

end

但是，我收到以下错误消息：

 Failure/Error: email = InvitationEmail.invitation_email(user).deliver
 NoMethodError:
   undefined method `recipients' for #<InvitationMailer:0x007fca0b41f7f8>

知道它可能是什么吗？

Answer 1

这是来自Rails Guide for ActionMailer 的示例：

class UserMailer < ActionMailer::Base
  default :from => "notifications@example.com"

  def welcome_email(user)
    @user = user
    @url  = "http://example.com/login"
    mail(:to => user.email,
         :subject => "Welcome to My Awesome Site",
         :template_path => 'notifications',
         :template_name => 'another')
  end
end

让你的代码看起来更像这样可能更容易解决，所以我首先将它重写为如下所示：

class InvitationMailer < ActionMailer::Base
  default from: "webmaster@myapp.com"

  def hassle_email(user)
    @user = user
    mail(:to => user.email,
         :subject => "You have been Invited!")
  end
end

然后您将拥有:to、:subject 和@user 对象传递给邮件程序“视图”，这与任何其他视图一样。

既然您使用的是recipients，我不确定您是否尝试将电子邮件发送到多个电子邮件地址。如果是这样，根据 ActionMailer 文档：

可以在一封电子邮件中向一个或多个收件人发送电子邮件 （例如，通知所有管理员新注册）通过设置列表 发送到 :to 键的电子邮件。电子邮件列表可以是电子邮件数组 地址或单个字符串，地址用逗号分隔。