I'm trying to create a custom form field that will validate against
auth.user. The field should throw a validation error if the user does
not exist, otherwise the field should validate.
So far I have:
class ExistingUserField(forms.CharField):
def clean(self, value):
# Check if the user exists
try:
user = User.objects.get(username=value)
except:
# User does not exist
raise forms.ValidationError('User %s not found' % value)
return value
I then use this in a form as:
class MyForm(forms.Form):
user = ExistingUserField(required=False)
This code works as expected when the user field is populated but does
not honour the "required=False" argument, when the user field is left
blank the error "User not found" is raised.
Do i need to check for all forms of None and blank strings? Is there a
better way?
Paddy
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