[web2py] form.validate().accepted ?

[Vinicius Assef]

I tryed this construction:
if form.validate().accepted:
   print "accepted"

But I got this error:
AttributeError: 'NoneType' object has no attribute 'accepted'

In book, chapter 7, "SQLFORM without database IO" section has 2
examples using form.validate().accepted.
Is it an error or didn't I get something?

--
Vinicius Assef.