Hi, I am new to Python and web2py and I am not sure if my approach below is
correct - in any case I have a problem with it:
I have added 2 extra fields in db.py as follows:
from applications.myapp.modules.countriesandcities import *
auth.settings.extra_fields['auth_user']=[
Field('country'),
Field('city')]
db.auth_user.country.requires = IS_IN_SET(COUNTRIESANDCITIES.keys()) #
this is working as expected
db.auth_user.city.requires =
IS_IN_SET(COUNTRIESANDCITIES[request.post_vars.country]) # this is not
working - getting KeyError
I created a module called countriesandcities.py (shortened here for
illustration):
COUNTRIESANDCITIES = {'Australia':["Adelaide", "Brisbane", "Perth",
"Melbourne"], 'Malaysia': ["Ampang", "Kuching", "Miri", "Kuala Lumpur"]}
What I am trying to achieve is this:
(1) When user is registering, user will select the 'country' from a drop
down list which is required to be one of the keys in the COUNTRIESANDCITIES
dict. This part works fine.
(2) Based on the selection in (1) above, the user will now select the
'city' from a drop down list and this drop down list should just show the
'values' (cities) for the 'key' (country) previously selected.
However, part (2) doesn't seem to be working and I am getting this error:
<type 'exceptions.KeyError'>(None)
That seems to suggest that there is no existing 'key' which would seem to
imply that request.post_vars.country is not working.
Any help would very much be appreciated.
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