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[Bug 1456871] Re: objects.InstanceList.get_all(context, ['metadata', 'system_metadata']) return error can't locate strategy for %s %s" % (cls, key)

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Launchpad Bug Tracker <1456871@xxxxxxxxxxxxxxxxxx>
Date: Sat, 10 Oct 2015 04:17:31 -0000
Reply-to: Bug 1456871 <1456871@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

[Expired for OpenStack Compute (nova) because there has been no activity
for 60 days.]

** Changed in: nova
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1456871

Title:
  objects.InstanceList.get_all(context, ['metadata','system_metadata'])
  return error can't locate strategy for %s %s" % (cls, key)

Status in OpenStack Compute (nova):
  Expired

Bug description:
  When invoke

  objects.InstanceList.get_all(context, ['metadata','system_metadata'])

  
  Then found the nova/objects/instance.py  function  _expected_cols(expected_attrs):

  will return list ['metadata','system_metadata', 'extra',
  'extra.flavor'], then in the db query it throw the error: can't locate
  strategy for <class 'sqlalchemy.orm.properties.ColumnProperty'>
  (('lazy', 'joined'),)

  Could anyone can help have a look? Thanks!

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