Web2py defaults to using an 'id' field of type sequence. In the online book they have a section called 'Legacy Databases and Keyed Tables<http://web2py.com/book/default/chapter/06#Legacy-Databases-and-Keyed-Tables> ' Here they identify a method of setting a different field to be you primary key... so for you I believe you would have:
db.define_table('test',
Field('test_id', id),
Field('name'),
migrate=False, fake_migrate=True)
Hope this helps,
