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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, print_function, unicode_literals
__metaclass__ = type
__all__ = [
'PostgreSQLDatabase',
'make_temporary',
]
import types
from functools import partial
from operator import attrgetter
from urlparse import urlsplit, urlunsplit
from mailman.database.base import StormBaseDatabase
from mailman.testing.helpers import configuration
class PostgreSQLDatabase(StormBaseDatabase):
"""Database class for PostgreSQL."""
TAG = 'postgres'
def _database_exists(self, store):
"""See `BaseDatabase`."""
table_query = ('SELECT table_name FROM information_schema.tables '
"WHERE table_schema = 'public'")
results = store.execute(table_query)
table_names = set(item[0] for item in results)
return 'version' in table_names
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)
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__))
# Test suite adapter for ITemporaryDatabase.
def _cleanup(self, store, tempdb_name):
from mailman.config import config
store.rollback()
store.close()
# From the original database connection, drop the now unused database.
config.db.store.execute('DROP DATABASE {0}'.format(tempdb_name))
def make_temporary(database):
"""Adapts by monkey patching an existing PostgreSQL IDatabase."""
from mailman.config import config
parts = urlsplit(config.database.url)
assert parts.scheme == 'postgres'
new_parts = list(parts)
new_parts[2] = '/mmtest'
url = urlunsplit(new_parts)
# Use the existing database connection to create a new testing
# database.
config.db.store.execute('ABORT;')
config.db.store.execute('CREATE DATABASE mmtest;')
with configuration('database', url=url):
database.initialize()
database._cleanup = types.MethodType(
partial(_cleanup, store=database.store, tempdb_name='mmtest'),
database)
# bool column values in PostgreSQL.
database.FALSE = 'False'
database.TRUE = 'True'
return database
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