On 08/10/06 20:25, DavidA wrote:
> Steven Armstrong wrote:
>> I've had similar problems and solved them like this:
>>
>> myproject/validators.py
>> %<------------------------------
>> from django.utils.translation import gettext_lazy as _
>> from django.core.validators import *
>> import re
>>
>> my_ansi_date_re = re.compile('put regexp here')
>> def isValidANSIDate(field_data, all_data):
>> if not my_ansi_date_re.search(field_data):
>> raise ValidationError, _('Enter a valid date in PUT FORMAT
>> DESCRIPTION HERE format.')
>>
>> [more custom or overridden validators]
>> %<------------------------------
>>
>> And in my models I do:
>> from myproject import validators
>>
>> instead of
>>
>> from django.core import validators
>>
>>
>> Like this I can override any of djangos validators or add custom ones
>> and they are all still available in one namespace.
>>
>> hope this helps
>> cheers
>> Steven
>
> Hi Steven,
>
> I tried your suggestion, but it still seems that Django is using the
> isValidANSIDate funcion from django.core.validators rather than mine. I
> put trace statements in django.core.validators.py as well as my
> override and although I could see mine being imported after the core
> ones, when the form's validation occurs, its using the core one. I
> googled on "override module function in python" and got this hit:
>
> http://groups.google.com/group/comp.lang.python/browse_thread/thread/30bfdfd91d759275/6eaa3b20deb47d84%236eaa3b20deb47d84
>
> I've used the suggested technique in the following way and now it
> works:
>
> ---- my custom validators.py ----
> from pf.utils.convert import toDateRelaxed
>
> def isValidANSIDate(field_data, all_data):
> try:
> toDateRelaxed(field_data)
> except ValueError:
> raise ValidationError, "Invalid date"
>
> import django.core.validators
> django.core.validators.isValidANSIDate = isValidANSIDate
> ----
>
> And then I import my validators in my models.py class. The downside to
> this, as explained in the link, is that if someone uses
>
> from django.core.validators import isValidANSIDate
>
> they will get the original, not my custom version.
>
> Thanks for your suggestion as it got me on the right track.
> -Dave
>
Hi Dave
Good to hear you've found a solution.
I have yet only used my approach with validators that I've set myself by
passing them to the field constructors.
Guess it fails with the date related fields because django imports and
adds them automagically there.
cheers
Steven
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