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Reviewed:  https://review.openstack.org/291259
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=dc68662a0be831b66fc50d6bca7a8f1d70351200
Submitter: Jenkins
Branch:    master

commit dc68662a0be831b66fc50d6bca7a8f1d70351200
Author: Hirofumi Ichihara <ichihara.hirofumi@xxxxxxxxxxxxx>
Date:   Fri Mar 11 00:49:06 2016 +0900

    Fix PUT tag failure
    
    This patch fix failure putting tag on network.
    Timestamp causes the issue because it try to update 'updated_at'
    of tag which doesn't have the attribute.
    
    Change-Id: Iad088bbaf4b05a25153964ed30762b70fc8b3318
    Closes-Bug: #1555686


** Changed in: neutron
       Status: In Progress => Fix Released

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Title:
  Can't PUT tag on network

Status in neutron:
  Fix Released

Bug description:
  Tag update fails.

  $ neutron net-create test-network
  $ neutron tag-add --resource-type network --resource test-network --tag test-tag
  Request Failed: internal server error while processing your request.
  Neutron server returns request_ids: ['req-ccb9c3ec-6cdc-4638-b096-32e082b56bdc']

  Error log:

  2016-03-10 15:33:52.744 ERROR neutron.api.v2.resource [req-ccb9c3ec-6cdc-4638-b096-32e082b56bdc demo 83ff410076214c88ad045e59e9e9e95f] update failed
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource Traceback (most recent call last):
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource   File "/opt/stack/neutron/neutron/api/v2/resource.py", line 84, in resource
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource     result = method(request=request, **args)
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource   File "/opt/stack/neutron/neutron/extensions/tag.py", line 104, in update
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource     return self.plugin.update_tag(request.context, parent, parent_id, id)
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/oslo_log/helpers.py", line 46, in wrapper
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource     return method(*args, **kwargs)
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource   File "/opt/stack/neutron/neutron/services/tag/tag_plugin.py", line 99, in update_tag
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource     context.session.add(tag_db)
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 490, in __exit__
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource     self.rollback()
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/util/langhelpers.py", line 60, in __exit__
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource     compat.reraise(exc_type, exc_value, exc_tb)
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 487, in __exit__
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource     self.commit()
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 392, in commit
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource     self._prepare_impl()
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 372, in _prepare_impl
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource     self.session.flush()
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 2019, in flush
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource     self._flush(objects)
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 2046, in _flush
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource     self.dispatch.before_flush(self, flush_context, objects)
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/event/attr.py", line 218, in __call__
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource     fn(*args, **kw)
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource   File "/opt/stack/neutron/neutron/services/timestamp/timestamp_db.py", line 74, in update_timestamp
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource     obj.standard_attr.updated_at = timeutils.utcnow()
  2016-03-10 15:33:52.744 TRACE neutron.api.v2.resource AttributeError: 'NoneType' object has no attribute 'updated_at'

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