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method

after_save

Importance_3
Ruby on Rails latest stable (v4.0.2) - 3 notes - Class: ActiveRecord::Callbacks

Method deprecated or moved

This method is deprecated or moved on the latest stable version. The last existing version (v2.3.8) is shown here.

after_save() public

Is called after Base.save (regardless of whether it’s a create or update save). Note that this callback is still wrapped in the transaction around save. For example, if you invoke an external indexer at this point it won’t see the changes in the database.

 class Contact < ActiveRecord::Base
   after_save { logger.info( 'New contact saved!' ) }
 end
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July 28, 2009
8 thanks

Return True

As is the case with the before_validation and before_save callbacks, returning false will break the callback chain. For example, the expire_cache_id method will not run if Rails.cache.expire returns false (as it will if the key is not cached with memcache).

Returning False Example (Bad)

after_save :expire_cache_by_name
after_save :expire_cache_by_id

def expire_cache_by_name
  Rails.cache.expire("my_object:name:#{self.name}")
end

def expire_cache_by_id
  Rails.cache.expire("my_object:#{self.id}")
end

Returning True Example (Good)

def expire_cache_by_name
  Rails.cache.expire("my_object:name:#{self.name}")
  return true
end

def expire_cache_by_id
  Rails.cache.expire("my_object:#{self.id}")
  return true
end
September 7, 2011 - (v3.0.0 - v3.0.9)
0 thanks

Tested w/ Rails 3 and returning true/false ignored

Per http://ar.rubyonrails.org/classes/ActiveRecord/Callbacks.html “If a before_* callback returns false, all the later callbacks and the associated action are cancelled. If an after_* callback returns false, all the later callbacks are cancelled.” [and presumably associated action is not canceled]

So, the callback chain will be broken, but the save will still happen.

Also ran into this: http://innergytech.wordpress.com/2010/03/08/dont-put-validations-in-after_save/

March 10, 2014
0 thanks

gives a parameter

As a note, you can use it like this:

after_save {|instance|

}

it will pass in the instance being saved.