Re: [web2py] SQL UNIQUE IN WEB2PY : CONSTRAINT unique_test UNIQUE (num_part1, num_part2, num_part3, title)

[pbreit]

UNIQUE applies at the database level. IS_NOT_IN_DB applies during form 
validation.

I'm not sure that's going to work. Maybe a custom validator?
http://web2py.com/book/default/chapter/07#Custom-Validators