devise 异步发邮件
http://blog.devinterface.com/2011/03/how-to-send-email-asynchronously-using-devise-and-rails3/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+devinterfaceblog+%28DevInterface+Blog%29
How to send email asynchronously using Devise and Rails3
03:47 PM Development , Ruby Stefano
Hello everyone.
I’d show a workaround to send email asynchronously using Devise and Rails3.
Suppose we have already up and running our application with Devise and delayed_job correctly installed.
A first attempt was to add in config/initializers the following file (devise_async.rb):
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#devise_async.rb
module Devise
module Models
module Confirmable
handle_asynchronously :send_confirmation_instructions
end
module Recoverable
handle_asynchronously :send_reset_password_instructions
end
module Lockable
handle_asynchronously :send_unlock_instructions
end
end
end
This workaround has worked in part: the send method has been properly enqueued in the database, but when delayed_job tries to fire the job, the following error is raised:
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User# send_confirmation_instructions_without_delay failed with NoMethodError: undefined method 'send_confirmation_instructions_without_delay' for # - 1 failed attempts
[ Worker ( host:stefano-desktop pid: 13153 ) ]
As you can see, the job is trying to call the wrong send method: send_confirmation_instructions_without_delay.
At this point, I’ve implemented an even more dirty hack, overriding Devise’s methods using the syntax specified by intridea to send emails in the background:
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#devise_async.rb
module Devise
module Models
module Confirmable
# Send confirmation instructions by email
def send_confirmation_instructions
generate_confirmation_token! if self . confirmation_token . nil ?
::Devise. mailer . delay . confirmation_instructions ( self )
end
end
module Recoverable
# Resets reset password token and send reset password instructions by email
def send_reset_password_instructions
generate_reset_password_token!
::Devise. mailer . delay . reset_password_instructions ( self )
end
end
module Lockable
# Send unlock instructions by email
def send_unlock_instructions
::Devise. mailer . delay . unlock_instructions ( self )
end
end
end
end
This solution, however, is too tied to the implementation of Devise and is therefore not a good one (besides being really really dirty).
The latest idea, which represents the solution I’ve used is implemented as follows: use the alias_method in this way:
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#devise_async.rb
module Devise
module Models
module Confirmable
alias_method :send_confirmation_instructions_without_delay , :send_confirmation_instructions
handle_asynchronously :send_confirmation_instructions
end
module Recoverable
alias_method :send_reset_password_instructions_without_delay , :send_reset_password_instructions
handle_asynchronously :send_reset_password_instructions
end
module Lockable
alias_method :send_unlock_instructions_without_delay , :send_unlock_instructions
handle_asynchronously :send_unlock_instructions
end
end
end
This latest hack works a treat; is not the best but let you send mail with Devise asynchronously.
If you have any better solutions, do not hesitate to share.