On Nov 6, 2005, at 3:42 PM, TomRossi7 wrote:

> James,
>
> Thanks for the reply.  I've ordered "Agile Web Development with Rails:
> A Pragmatic Guide", but couldn't wait to get started in the framework.
>
> For the example I gave, where would you store the unique attributes
> associated with my subclasses?  For example where would the
> "TowingCapacity" field be located?
>
> In my application each of the 10 subclass has around 20 unique
> attributes.  I hope that the solution won't require me to create one
> table with over 200 fields (with each row having 180 NULL fields for
> the non-applicable attributes).

That's exactly the case, with Rails Single Table Inheritance.  It's  
hard for me if that's the best move, with this dataset since I don't  
know too much about it.

Also, the Rails Mailing list might have better ideas about approach.

James Edward Gray II