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Rails Mailer with delayed_job_active_record

I'm trying to use delayed_job_active_record with Rails 3.2.13.

Whenever I use MyMailer.delay(args) the task never appears to run (based on log output). Putting the .delay anywhere else results in an error being thrown.

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Posted Jun 25 2014 6:17 UTC


  • Assigned To jmaddington
  • Solved
  • ruby

17 Replies

Are you running a worker in another process? Else nothing will actually run the task for you.

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Posted Jun 25 2014 6:19 UTC

Yes. The queue runs without errors that I see, but nothing inside actually seems to run.

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Posted Jun 25 2014 6:20 UTC

You are certain that the jobs are being placed in the delayed_job table in the database?

You can see if the job is present here, by looking for it with


and checking if the run_at is in the past


or if it has run and failed


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Posted Jun 25 2014 6:24 UTC

what version of gem are you using?

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Posted Jun 25 2014 6:28 UTC

You can try something simple from console like MyMailer.delay.some_email and check if the process gets executed (or as ohm said at least queued in the db).

Also you can change delayed job config to do background jobs more frequently so that you don't have to wait delayed job to wake up (default is 60s I think) while you're testing e.g. put inside:

# config/initializers/delayed_job_config.rb
Delayed::Worker.sleep_delay = 0.5
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Posted Jun 25 2014 6:29 UTC

Are you sure your mailer can send mail?

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Posted Jun 25 2014 6:42 UTC

Check this out, might help you.

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Posted Jun 25 2014 6:58 UTC

^^ this is why i asked about the Gems version your using, as the problem doesnt actually lie with that version of ruby rails, but rather the ruby gems

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Posted Jun 25 2014 7:00 UTC

You said "Putting the .delay anywhere else results in an error being thrown.", can you explicit about what kind of error you saw?

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Posted Jun 25 2014 7:00 UTC

Have you start the process with script/delayed_job start?

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Posted Jun 25 2014 7:02 UTC

Mails go out without delayed_job, I have other tasks in the same queue that run without issue.

@ohm, I'll check that as soon as I can, getting pulled off somewhere else at the moment.

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Posted Jun 25 2014 8:18 UTC

Also, check that you can create the job from the console:

MyMailer.delay.mail_method(:with, :correct, :args)

and see that this is injected into the queue.

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Posted Jun 25 2014 8:23 UTC

This is a forked version of

Line 31 of is essentially where I am trying to insert this

I can't easily create the job from the console as the session is initialized with a POST from a third party I don't control followed by same API calls that are going to be a pain to mimic.

That said, I can confirm the job is being created

  • queue on web site
  • select count(*) from delayed_jobs;
  • count ------- 1
  • rake jobs:workoff

    [Worker(host:142f13f7-abca-480a-997c-7fa45666e0a4 pid:2)] Job Delayed::PerformableMailer (id=78) RUNNING

    (2.0ms) BEGIN

    SQL (6.3ms) DELETE FROM "delayed_jobs" WHERE "delayed_jobs"."id" = $1 [["id", 78]]

    (4.2ms) COMMIT [Worker(host:142f13f7-abca-480a-997c-7fa45666e0a4 pid:2)] No more jobs available. Exiting

    SQL (2.3ms) UPDATE "delayed_jobs" SET "locked_by" = NULL, "locked_at" = NULL WHERE "delayed_jobs"."locked_by" = 'host:142f13f7-abca-480a-997c-7fa45666e0a4 pid:2'

  • select count(*) from delayed_jobs;

  • count ------- 0

@tubaxenor: According to the official docs the syntax for delayed jobs with Rails 3 mailers is MyMailer.delay.send_something(args) instead of MyMailer.send_something(args).delay.deliver (which is how it works on most other functions), I'm really just confirming that this is the point.

@sfsgagi The jobs run every second or so already

@user2923 Yes, it sends find when I use MyMailer.send_something(args).deliver


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   Using therubyracer 0.12.1

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   Installing bourbon 3.2.3

   Using delayed_job 4.0.2

   Using mail 2.5.4

   Using typhoeus 0.6.8

   Using thecity 0.0.9

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   Using activeresource 3.2.13

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Posted Jun 25 2014 12:53 UTC

Also tried upgrading to Rails 3.2.18 without result. Part of notifier.rb (which has the action mailer) is

puts "CTDEBUG: Getting ready to send mail"

mail( :from => ApiSetting.first.SMTP_FROM ,:to =>,:subject => subject )

puts "CTDEBUG: Mail should have been sent"

The "puts" show up without the delay. With it, the jobs are worked off but I never see the puts statements run.

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Posted Jun 25 2014 12:54 UTC

Just to get this straight, this:

Notifier.send_group_email(@user, message, "From: #{@leader} To: #{@group}").deliver

works, but this:

Notifier.delay.send_group_email(@user, message, "From: #{@leader} To: #{@group}")


Does it work with other mails - or is it all delays on mails that isn't working?

It seems like it actually executes the job, are you sure that the worker has a connection to the SMTP server, so that it can actually send the mail?

Have you tried it locally and used a mail catcher gem like mailcatcher ( to setup a local SMTP server, that will catch the mail?

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Posted Jun 25 2014 14:00 UTC

@Ohm, correct, it only fails with the delay. I can see the job being processed but it looks like it doesn't actually run.

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Posted Jun 26 2014 3:26 UTC

I finally got it working, instead of passing @user I starting passing just the email address, works without an issue now.

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Posted Jun 26 2014 3:37 UTC


This didn't solve your task? Get your own custom solution.

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