[Rails] Re: Manipulating attributes between database retrieval and return from finder

On Jan 8, 4:06 am, Evan <evancha...@gmail.com> wrote:
> Is there a way to manipulate the attributes of an ActiveRecord-based
> model after it is retrieved from the database but before it is
> returned from the finder?
>
> I have tried defining an after_find callback method but was unable to
> access attributes that come from the database from this method. I
> tried accessing them using self.an_attribute and read_attribute but
> both raised an attribute exception.

Can you show exactly what you did and exactly what happened ? I can't
imagine why this wouldn't work.

Fred
>
> I am trying to execute an upgrade-in-place strategy. When I deploy the
> latest version of my app one of the attributes on every existing
> record of a particular table will no longer be usable until converted
> to a new format. Rather than take the app down for 12 hours to upgrade
> the existing data I thought it could be upgraded on-access.
>
> Evan

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