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import re
from django.core.validators import ValidationError
from django.utils.encoding import smart_unicode
from tagging.utils import get_tag_name_list
tag_re = re.compile(r'^[-\w]+$', re.U)
tag_list_re = re.compile(r'^[-\w]+(?:(?:,\s|[,\s])[-\w]+)*$', re.U)
def isTagList(field_data, all_data):
"""
Validates that ``field_data`` is a valid list of tag names,
separated by a single comma, a single space or a comma followed
by a space.
"""
if field_data is not None:
field_data = smart_unicode(field_data)
if not tag_list_re.search(field_data):
raise ValidationError(u'Tag names must contain only unicode alphanumeric characters, numbers, underscores or hyphens, with a comma, space or comma followed by space used to separate each tag name.')
tag_names = get_tag_name_list(field_data)
for tag_name in tag_names:
if len(tag_name) > 50:
raise ValidationError(u'Tag names must be no longer than 50 characters.')
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.')
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