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Ensured a connection is established when checking the database version.
Fixed a test broken by 21765c0a
. Refs #18135.
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@ -352,6 +352,18 @@ class BaseDatabaseWrapper(object):
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def make_debug_cursor(self, cursor):
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return util.CursorDebugWrapper(cursor, self)
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@contextmanager
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def temporary_connection(self):
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# Ensure a connection is established, and avoid leaving a dangling
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# connection, for operations outside of the request-response cycle.
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must_close = self.connection is None
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cursor = self.cursor()
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try:
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yield
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finally:
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cursor.close()
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if must_close:
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self.close()
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class BaseDatabaseFeatures(object):
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allows_group_by_pk = False
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@ -453,7 +453,8 @@ class DatabaseWrapper(BaseDatabaseWrapper):
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@cached_property
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def mysql_version(self):
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server_info = self.connection.get_server_info()
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with self.temporary_connection():
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server_info = self.connection.get_server_info()
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match = server_version_re.match(server_info)
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if not match:
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raise Exception('Unable to determine MySQL version from version string %r' % server_info)
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@ -623,8 +623,10 @@ class DatabaseWrapper(BaseDatabaseWrapper):
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@cached_property
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def oracle_version(self):
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with self.temporary_connection():
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version = self.connection.version
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try:
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return int(self.connection.version.split('.')[0])
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return int(version.split('.')[0])
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except ValueError:
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return None
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@ -152,7 +152,8 @@ class DatabaseWrapper(BaseDatabaseWrapper):
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@cached_property
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def pg_version(self):
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return get_version(self.connection)
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with self.temporary_connection():
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return get_version(self.connection)
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def get_connection_params(self):
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settings_dict = self.settings_dict
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@ -195,8 +195,7 @@ class DatabaseOperations(BaseDatabaseOperations):
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NotImplementedError if this is the database in use.
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"""
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if aggregate.sql_function in ('STDDEV_POP', 'VAR_POP'):
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pg_version = self.connection.pg_version
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if pg_version >= 80200 and pg_version <= 80204:
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if 80200 <= self.connection.pg_version <= 80204:
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raise NotImplementedError('PostgreSQL 8.2 to 8.2.4 is known to have a faulty implementation of %s. Please upgrade your version of PostgreSQL.' % aggregate.sql_function)
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def max_name_length(self):
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