get_version_history.py
178aba27bbe3maint-2.1

get_version_history.py
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			# -- coding: utf-8 --
			##
			## This file is part of Invenio.
			## Copyright (C) 2014 CERN.
			##
			## Invenio is free software; you can redistribute it and/or
			## modify it under the terms of the GNU General Public License as
			## published by the Free Software Foundation; either version 2 of the
			## License, or (at your option) any later version.
			##
			## Invenio is distributed in the hope that it will be useful, but
			## WITHOUT ANY WARRANTY; without even the implied warranty of
			## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
			## General Public License for more details.
			##
			## You should have received a copy of the GNU General Public License
			## along with Invenio; if not, write to the Free Software Foundation, Inc.,
			## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.


			def get_version_history(self):
			"""Returns list of older version `_id`s."""
			older = self.storage_engine.get_one(self['older_version'])
			return older.get('version_history', []) + \
			self['older_version'] and [self['older_version']] or []