Rails - Apr 2006 - Observer best practices

I''ve seen two ways of connecting observers:

1) In the observer class put

      observe MyModel

2) In the controller class put

      observer :my_observer

What is the difference between these two?  Also, is it necessary to put 
in the observer class the following?

      MyObserver.instance

Jose

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On Apr 26, 2006, at 3:09 PM, Jose Hales-Garcia wrote:
> I''ve seen two ways of connecting observers:
>
> 1) In the observer class put
>
>       observe MyModel
>
> 2) In the controller class put
>
>       observer :my_observer
>
> What is the difference between these two?  Also, is it necessary to  
> put
> in the observer class the following?
>
>       MyObserver.instance
>
> Jose
>
Don''t go the controller route... that doesn''t really work when
you''re
doing stuff that isn''t through your controllers.

I posted about this a while back on my blog:

http://www.robbyonrails.com/articles/2006/02/27/where-did-my-observer-go

You can do the following:

1) create the observer:

# app/models/custom_observer.rb
class CustomObserver < ActiveRecord::Observer
   # showing how you can use Camel or symbols
   observe Contact, :contact_note

   def after_create( object )
     # do something... with object
   end
end

2) Modify config/environment.rb

config.active_record.observers = :custom_observer

3) have fun!

Hope that helps!

Robby


Robby Russell
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