def update_tags(self, obj, tag_names, default_namespace=None, q=None):
"""
Update tags associated with an object.
Accepts a ``default_namespace`` parameter that is assigned to tags
with no namespace specified.
"""
ctype = ContentType.objects.get_for_model(obj)
current_tags = self.filter(items__content_type__pk=ctype.pk,
items__object_id=obj.pk)
if q is not None:
current_tags = current_tags.filter(q)
current_tags = list(current_tags)
updated_tag_names = parse_tag_input(tag_names,
default_namespace=default_namespace)
if conf.FORCE_LOWERCASE_TAGS:
updated_tag_names = [t.lower() for t in updated_tag_names]
# Remove tags which no longer apply
tags_for_removal = [tag for tag in current_tags \
if unicode(tag) not in updated_tag_names]
if len(tags_for_removal):
TaggedItem._default_manager.filter(content_type__pk=ctype.pk,
object_id=obj.pk, tag__in=tags_for_removal).delete()
# Add new tags
current_tag_names = [unicode(tag) for tag in current_tags]
for tag_name in updated_tag_names:
if tag_name not in current_tag_names:
tag, created = self.get_or_create(**get_tag_parts(tag_name))
TaggedItem._default_manager.create(tag=tag, object=obj)
def update_tags(self, obj, tag_names, default_namespace=None, q=None):
"""
Update tags associated with an object.
Accepts a ``default_namespace`` parameter that is assigned to tags
with no namespace specified.
"""
ctype = ContentType.objects.get_for_model(obj)
current_tags = self.filter(items__content_type__pk=ctype.pk,
items__object_id=obj.pk)
if q is not None:
current_tags = current_tags.filter(q)
current_tags = list(current_tags)
updated_tag_names = parse_tag_input(
tag_names, default_namespace=default_namespace)
if conf.FORCE_LOWERCASE_TAGS:
updated_tag_names = [t.lower() for t in updated_tag_names]
# Remove tags which no longer apply
tags_for_removal = [tag for tag in current_tags \
if str(tag) not in updated_tag_names]
if len(tags_for_removal):
TaggedItem._default_manager.filter(
content_type__pk=ctype.pk,
object_id=obj.pk,
tag__in=tags_for_removal).delete()
# Add new tags
current_tag_names = [str(tag) for tag in current_tags]
for tag_name in updated_tag_names:
if tag_name not in current_tag_names:
tag, created = self.get_or_create(**get_tag_parts(tag_name))
TaggedItem._default_manager.create(tag=tag, object=obj)
def clean(self, value):
value = super(TagField, self).clean(value)
if value == u'':
return value
for tag_name in parse_tag_input(
value, default_namespace=self.default_namespace):
try:
check_tag_length(get_tag_parts(tag_name))
except (ValueError, e):
if len(e.args) < 3:
raise
part, max_len = e.args[1:3]
if part == 'tag':
raise forms.ValidationError(
_('Each tag may be no more than %s characters long.') %
max_len)
elif part == 'namespace':
raise forms.ValidationError(
_('Each tag\'s namespace may be no more than %s characters long.'
) % max_len)
elif part == 'name':
raise forms.ValidationError(
_('Each tag\'s name may be no more than %s characters long.'
) % max_len)
elif part == 'value':
raise forms.ValidationError(
_('Each tag\'s value may be no more than %s characters long.'
) % max_len)
else:
raise
return value
def add_tag(self, obj, tag_name, default_namespace=None):
"""
Associates the given object with a tag.
Accepts a ``default_namespace`` parameter that is assigned to a tag
with no namespace specified.
"""
tag_names = parse_tag_input(tag_name,
default_namespace=default_namespace)
if not len(tag_names):
raise AttributeError(_('No tags were given: "%s".') % tag_name)
if len(tag_names) > 1:
raise AttributeError(_('Multiple tags were given: "%s".') % tag_name)
tag_name = tag_names[0]
if conf.FORCE_LOWERCASE_TAGS:
tag_name = tag_name.lower()
tag, created = self.get_or_create(**get_tag_parts(tag_name))
ctype = ContentType.objects.get_for_model(obj)
TaggedItem._default_manager.get_or_create(
tag=tag, content_type=ctype, object_id=obj.pk)
def clean(self, value):
value = super(TagField, self).clean(value)
if value == u'':
return value
for tag_name in parse_tag_input(value, default_namespace=self.default_namespace):
try:
check_tag_length(get_tag_parts(tag_name))
except ValueError, e:
if len(e.args) < 3:
raise
part, max_len = e.args[1:3]
if part == 'tag':
raise forms.ValidationError(_('Each tag may be no more than %s characters long.') % max_len)
elif part == 'namespace':
raise forms.ValidationError(_('Each tag\'s namespace may be no more than %s characters long.') % max_len)
elif part == 'name':
raise forms.ValidationError(_('Each tag\'s name may be no more than %s characters long.') % max_len)
elif part == 'value':
raise forms.ValidationError(_('Each tag\'s value may be no more than %s characters long.') % max_len)
else:
raise
def add_tag(self, obj, tag_name, default_namespace=None):
"""
Associates the given object with a tag.
Accepts a ``default_namespace`` parameter that is assigned to a tag
with no namespace specified.
"""
tag_names = parse_tag_input(tag_name,
default_namespace=default_namespace)
if not len(tag_names):
raise AttributeError(_('No tags were given: "%s".') % tag_name)
if len(tag_names) > 1:
raise AttributeError(
_('Multiple tags were given: "%s".') % tag_name)
tag_name = tag_names[0]
if conf.FORCE_LOWERCASE_TAGS:
tag_name = tag_name.lower()
tag, created = self.get_or_create(**get_tag_parts(tag_name))
ctype = ContentType.objects.get_for_model(obj)
TaggedItem._default_manager.get_or_create(tag=tag,
content_type=ctype,
object_id=obj.pk)
