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# Copyright (C) 2011-2015 by the Free Software Foundation, Inc.
#
# This file is part of GNU Mailman.
#
# GNU Mailman 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 3 of the License, or (at your option)
# any later version.
#
# GNU Mailman 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
# GNU Mailman. If not, see <http://www.gnu.org/licenses/>.
"""PostgreSQL database support."""
__all__ = [
'PostgreSQLDatabase',
]
from mailman.database.base import SABaseDatabase
from mailman.database.model import Model
class PostgreSQLDatabase(SABaseDatabase):
"""Database class for PostgreSQL."""
def _post_reset(self, store):
"""PostgreSQL-specific test suite cleanup.
Reset the <tablename>_id_seq.last_value so that primary key ids
restart from zero for new tests.
"""
super(PostgreSQLDatabase, self)._post_reset(store)
tables = reversed(Model.metadata.sorted_tables)
# Recipe adapted from
# http://stackoverflow.com/questions/544791/
# django-postgresql-how-to-reset-primary-key
for table in tables:
store.execute("""\
SELECT setval('"{0}_id_seq"', coalesce(max("id"), 1),
max("id") IS NOT null)
FROM "{0}";
""".format(table))
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