On Apr 13, 2008, at 10:16 AM, Frank Tsao wrote:
> validates_uniqueness_of :A, :scope => :B

cannot work - the concept itself is fatally flawed and can never be  
made to work using the current process

http://drawohara.com/post/18926188

you *MUST* put this constraint in the db unless you really don't care  
about it.

from rails-core on the subject

http://www.mail-archive.com/rubyonrails-core / googlegroups.com/msg04584.html

regards.

a @ http://codeforpeople.com/
--
we can deny everything, except that we have the possibility of being  
better. simply reflect on that.
h.h. the 14th dalai lama