def _save_tag(self, tags, standard_attr_id):
ctx = context.get_admin_context()
for tag in tags:
with ctx.session.begin(subtransactions=True):
tag_db = tag_module.Tag(standard_attr_id=standard_attr_id,
tag=tag)
ctx.session.add(tag_db)
def update_tag(self, context, resource, resource_id, tag):
res = self._get_resource(context, resource, resource_id)
if any(tag == tag_db.tag for tag_db in res.standard_attr.tags):
return
try:
with context.session.begin(subtransactions=True):
tag_db = tag_model.Tag(standard_attr_id=res.standard_attr_id,
tag=tag)
context.session.add(tag_db)
except db_exc.DBDuplicateEntry:
pass
def update_tags(self, context, resource, resource_id, body):
res = self._get_resource(context, resource, resource_id)
new_tags = set(body['tags'])
old_tags = {tag_db.tag for tag_db in res.standard_attr.tags}
tags_added = new_tags - old_tags
tags_removed = old_tags - new_tags
with context.session.begin(subtransactions=True):
for tag_db in res.standard_attr.tags:
if tag_db.tag in tags_removed:
context.session.delete(tag_db)
for tag in tags_added:
tag_db = tag_model.Tag(standard_attr_id=res.standard_attr_id,
tag=tag)
context.session.add(tag_db)
return body