On Apr 2, 10:32 am, Jonathan Lundell <[email protected]> wrote:
> I think I've seen an answer to this one, but I can't find it.
>
> I've got a form with two Field's, both IS_IPV4(). The validation I'm after is
> that one or both must be present; the only invalid case is both of them null.
>
.... sort of a situation as with checkboxes, multi-choice, but not-
none? I see.
> How do I write that?
... If you are using one of the SQLFORM methods, you might consider
something like this:
if form.accepts(request.vars, session=session, keepvalues=True,
dbio=False # this will allow you to add your combinatorial
validation):
if at_least_one( request.vars.first, request.vars.second):
session.flash = "Form Accepted!"
# then follow the appropriate update or insert pattern
from http://www.web2py.com/book/default/section/7/2?search=dbio
redirect(URL(r=request, c='default', f='index'))
else
response.flash = 'Form Error - must complete one of first or
second...'
elif form.errors:
response.flash = 'Form has errors...'
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