发送一封电子邮件时,日志会显示两次电子邮件？虽然它只发送一次？

Question

在我的应用程序中,DJ发了一封电子邮件,但出于某种原因,我在日志文件中看到了两次电子邮件,虽然它只发送一次？我在日志中确认DJ只运行一次而user_mailer只运行一次.那么为什么我会在日志文件中看到两次电子邮件？Rails在做什么？

Rendered user_mailer/room_notification.text.erb (0.9ms)

Sent mail to rachela.xxxxxxx@gmail.com (1097ms)
Date: Fri, 30 Sep 2011 13:34:56 -0700
From: "roomxcom" <no-reply@roomxcom>
To: rachela.xxxxxxx@gmail.com
Message-ID: <123@-MacBook-Pro.local.mail>
Subject: [Email Testing] Test 12
Mime-Version: 1.0
Content-Type: text/plain;
 charset=UTF-8
Content-Transfer-Encoding: 7bit

AAAAA Did something:

Test 12

http://localhost:3000/c19

Sent mail to rachela.xxxxxxx@gmail.com (3510ms)
Date: Fri, 30 Sep 2011 13:34:56 -0700
From: "roomxcom" <no-reply@roomxcom>
To: rachela.xxxxxxx@gmail.com
Message-ID: <123@-MacBook-Pro.local.mail>
Subject: [Email Testing] Test 12
Mime-Version: 1.0
Content-Type: text/plain;
 charset=UTF-8
Content-Transfer-Encoding: 7bit

AAAAA Did something:

Test 12

http://localhost:3000/c19
  SQL (0.1ms)  BEGIN
  AREL (0.3ms)  DELETE FROM "delayed_jobs" WHERE "delayed_jobs"."id" = 25
  SQL (0.4ms)  COMMIT

延迟工作:

UserMailer.delay.room_notification(room, record.user, room_member.user, record.item)

用户邮件:

def room_notification(room, user_creator, user_recipient, item)
  ...
mail( :from => "XXXX <no-reply@XXXXXXXXXX.com>",
      :to => user_recipient.email,
      :subject => "[#{@room.title}] #{@item.title}"
    ).deliver

知道发生了什么以及为什么rails会在日志中显示两次电子邮件？谢谢

Answer 1

编辑:这是一个更明确的解释,现在是白天,我有一些咖啡......

这一行是将消息添加到队列中:

UserMailer.delay.room_notification(room, record.user, room_member.user, record.item)

所以Delayed_job然后调用该room_notification方法UserMailer发送邮件:

def room_notification(room, user_creator, user_recipient, item)
  # ...
  mail(:from => "XXXX <no-reply@XXXXXXXXXX.com>",
       :to => user_recipient.email,
       :subject => "[#{@room.title}] #{@item.title}"
  ).deliver
end

这本身就足以发送邮件,但你.deliver在mail方法的最后也有一个冗余,所以它发送两次.

TL; DR删除.deliver从mail(...)在room_notification方法,一切都应该罚款.