[Rails] Active Record Callbacks

[Lon Baker]

Is there a callback directly after an object is fetched?

In WebObjects we had numerous opportunities to perform actions on 
database objects when they were fetched or inserted, awakeFromFetch or 
awakeFromInserttion.

I see in the documentation before_create, before_destroy, before_save, 
etc. How would one perform a method after fetching the object but 
before utilizing that object?

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Thanks.
Lon