Rails - Mar 2006 - many to one :through another

Since has_one :colour :through => :species isn''t supported (for some
reason unknown to me), can anyone forsee any problems that the
following workaround might cause (in the Photo class).

has_many :artists, :through => :artist_photos
has_one :artist_photo

So effectively, the has_many statement gives me the through
functionality I need, but the has_one restricts the program to only
one artist for each photo. I know this might seem like a silly
question, but go easy, I''ve been doing this less than a week.
Thanks,
Nathan

unknown wrote:
> Since has_one :colour :through => :species isn''t supported (for
some
> reason unknown to me), can anyone forsee any problems that the
> following workaround might cause (in the Photo class).
> 
> has_many :artists, :through => :artist_photos
> has_one :artist_photo
> 
> So effectively, the has_many statement gives me the through
> functionality I need, but the has_one restricts the program to only
> one artist for each photo. I know this might seem like a silly
> question, but go easy, I''ve been doing this less than a week.
> Thanks,
> Nathan
thing.species.colour isn''t terse enough? Or are you trying to optimize 
the number of queries to get to the colour attribute?

You can simulate has_one with a has_many with an :order and :limit => 1 
(though the naming is still plural, not singular).

--
Josh Susser
http://blog.hasmanythrough.com

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