Rails - Sep 2005 - equivalent of Hibernate's UserType in ActiveRecord?

Hello,

Is there an equivalent of Hibernate''s UserType feature in
ActiveRecord?  I have a case where I don''t want the column''s
value,
but a class instance instance.

For instance, this column contains numbers, but this number is just an
identifier to a class instance (technically, an enum of sorts).

Unfortunately, the DB schema does not contain the lookup table, so I
need to emulate returning a class instance instead of the raw number
value.

Any tips or tricks are much appreciated,
Thanks!
Seth

Why don''t you just override the accessor method
and do the translation there?

-- 
-- Tom Mornini


On Sep 19, 2005, at 5:02 PM, Seth Ladd wrote:
> Hello,
>
> Is there an equivalent of Hibernate''s UserType feature in
> ActiveRecord?  I have a case where I don''t want the
column''s value,
> but a class instance instance.
>
> For instance, this column contains numbers, but this number is just an
> identifier to a class instance (technically, an enum of sorts).
>
> Unfortunately, the DB schema does not contain the lookup table, so I
> need to emulate returning a class instance instead of the raw number
> value.
>
> Any tips or tricks are much appreciated,
> Thanks!
> Seth
> _______________________________________________
> Rails mailing list
> Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

I seemed to have answered my own question.  There is the :composed_of
macro, which does what I''d like very closely.

http://ar.rubyonrails.com/classes/ActiveRecord/Aggregations/ClassMethods.html#M000232

Sorry for the noise!
Seth


On 9/19/05, Seth Ladd <sethladd-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Hello,
> 
> Is there an equivalent of Hibernate''s UserType feature in
> ActiveRecord?  I have a case where I don''t want the
column''s value,
> but a class instance instance.
> 
> For instance, this column contains numbers, but this number is just an
> identifier to a class instance (technically, an enum of sorts).
> 
> Unfortunately, the DB schema does not contain the lookup table, so I
> need to emulate returning a class instance instead of the raw number
> value.
> 
> Any tips or tricks are much appreciated,
> Thanks!
> Seth
>