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# Copyright (C) 2011-2012 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."""
from __future__ import absolute_import, unicode_literals
__metaclass__ = type
__all__ = [
'PostgreSQLDatabase',
]
from operator import attrgetter
from pkg_resources import resource_string
from mailman.database.base import StormBaseDatabase
class PostgreSQLDatabase(StormBaseDatabase):
"""Database class for PostgreSQL."""
def _database_exists(self, store):
"""See `BaseDatabase`."""
table_query = ('SELECT table_name FROM information_schema.tables '
"WHERE table_schema = 'public'")
table_names = set(item[0] for item in
store.execute(table_query))
return 'version' in table_names
def _get_schema(self):
"""See `BaseDatabase`."""
return resource_string('mailman.database.sql', 'postgres.sql')
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.
"""
from mailman.database.model import ModelMeta
classes = sorted(ModelMeta._class_registry,
key=attrgetter('__storm_table__'))
# Recipe adapted from
# http://stackoverflow.com/questions/544791/
# django-postgresql-how-to-reset-primary-key
for model_class in classes:
store.execute("""\
SELECT setval('"{0}_id_seq"', coalesce(max("id"), 1),
max("id") IS NOT null)
FROM "{0}";
""".format(model_class.__storm_table__))
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