in django-tagging, i found：
class Tag(models.Model):
"""
A basic tag.
"""
name = models.CharField(max_length=50, unique=True, db_index=True,
validator_list=[isTag])
objects = TagManager()
content from validator.py：
def isTag(field_data, all_data):
"""
Validates that ``field_data`` is a valid tag name.
"""
if field_data is not None:
field_data = smart_unicode(field_data)
if not tag_re.match(field_data):
raise ValidationError(u'Tag names must contain only unicode
alphanumeric characters, numbers, underscores or hyphens.')
but this did not work for me.
On 9月8日, 上午9时21分, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote:
> i used this:
> def isBlank(field,all_data):
> if field_data is None:
> raise ValidattionError(u'Cannot be Blank.')
>
> it not work for me.
> should i use if field_data is Blank?
>
> do someone know how to raise a error when the fields is blank? thx
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