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 PMDevelopment, RubyStefano

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:

1 2	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.