Why is this an endless loop? ActiveRecord

class Account < ActiveRecord::Base
  after_update :give_user_credit, :on => :update 

  def give_user_credit
    credit = User.current_user.credit + 3.8
    User.current_user.update_attribute(:credit, credit)
  end
end

When I use this the server hangs and when I come back to the application after a full reboot my credit is in t开发者_如何学Che £1000's.

Whats going on here..

Thanks :D

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Looks to me like you are setting the :give_user_credit callback to run every time that the record is updated.

But since the callback updates the record, it then triggers the callback again, which will continue on and on...

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You could also use this private method:

model.credit = 10
model.send(:update_without_callbacks)