Delayed_job in rails not working

Question

I'm just starting to learn the use of the delayed_job gem.

To test it, I added "delayed" to the welcome message function and changed this call from

UserMailer.welcome_email(self).deliver 

to

 UserMailer.delay.welcome_email(self) 

This is called inside the after_create user model. I see that the record appears in the delayed_job table after the function is executed. Now when I run "rake jobs: work" on the command line, the task starts, but gives errors below

 [Worker(host:Sanjay-PC pid:7008)] Starting job worker [Worker(host:Sanjay-PC pid:7008)] Class#welcome_email failed with NoMethodError: undefined method `welcome_email' for #<Class:0x4871d60> - 0 failed attempts [Worker(host:Sanjay-PC pid:7008)] 1 jobs processed at 0.0939 j/s, 1 failed ... 

I think if I changed the declaration of the welcome_email method to the class method as

  def self.welcome_email(user) 

(added self. in front), which may help. But then when I run rake jobs: work, I get the following error:

 rake aborted! undefined method `welcome_email' for class `UserMailer' C:/Ruby192/lib/ruby/gems/1.9.1/gems/activesupport-3.0.5/lib/active_support/core_ext/module/aliasing.rb:31:in `alias_method' C:/Ruby192/lib/ruby/gems/1.9.1/gems/activesupport-3.0.5/lib/active_support/core_ext/module/aliasing.rb:31:in `alias_method_chain' C:/Ruby192/lib/ruby/gems/1.9.1/gems/delayed_job-2.1.4/lib/delayed/message_sending.rb:50:in `handle_asynchronously' c:/mgn/mgn-r3/app/mailers/user_mailer.rb:10:in `<class:UserMailer>' c:/mgn/mgn-r3/app/mailers/user_mailer.rb:1:in `<top (required)>' C:/Ruby192/lib/ruby/gems/1.9.1/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:454:in `load' <Stack truncated> 

It seems he now knows the class as UserMailer, but somehow he does not see the method of the welcome_email class.

I am on Rails 3.0.5, Ruby 1.9.2p180, and the installed file delayed_job - 2.1.4 - on Windows

It does not seem to find any related answers.

Thanks for your thoughts.

-S

Adding UserMailer code for @pjammer request

 class UserMailer < ActionMailer::Base default :from => " [e-mail] " def welcome_email(user) @user = user @url = "http://example.com/login" mail(:to => user.email, :subject => "Welcome to My Awesome Site") end end 

Answer 1

Just use this

 UserMailer.delay.welcome_email(self).deliver 

instead

 UserMailer.welcome_email(self).delay.deliver 

Answer 2

My solution was to override the function in the handler class (for you, this is the UserMailer class)

 def self.taguri 'tag:ruby.yaml.org,2002:class' end 

This is a hack and I will try to find a better solution, but now it works for me.

(Rails 3.0.9, Ruby 1.9.2-p290, delayed_job 2.1.4)

Answer 3

https://groups.google.com/forum/?fromgroups=#!topic/delayed_job/_gvIcbXrOaE resolved my manual asynchronous error for class methods.

As with Brandon Keeper in the link above, the code is as follows:

 class ClassName class << self def foo end handle_asynchronously :foo end end 

then use ClassName.delay.foo