On Jul 10, 2:33 am, rb <rbspg...@gmail.com> wrote:
> Currently I'm using SQLite for the db although later I might switch to
> postgres. I'm trying to understand how best to create my tables (eg.
> how to specify a UNIQUE constraint over two or three fields for my
> primary key?). Oh gosh, I shouldn't post my questions here.

Here is an example of a custom multi-table IS_IN_DB():
http://groups.google.com/group/web2py/browse_thread/thread/cae53d68c91938c5

You want one for IS_NOT_IN_DB()

Original is in gluon/validators.py

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