> A form with a CharField seems to end up with a zero-length string in
> the cleaned_data if the field is not in the form data. Is there any
> good way to avoid this?
Django docs say:
"Note that empty string values will always get stored as empty strings,
not as NULL. Only use null=True for non-string fields such as integers,
booleans and dates. For both types of fields, you will also need to set
blank=True if you wish to permit empty values in forms, as the null
parameter only affects database storage (see blank).
Avoid using null on string-based fields such as CharField and TextField
unless you have an excellent reason. If a string-based field has
null=True, that means it has two possible values for "no data": NULL,
and the empty string. In most cases, it's redundant to have two possible
values for "no data;" Django convention is to use the empty string, not
NULL."
If you really need to get NULL, you've got to do this with your own
validators.
Kind regards
Michael
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