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62 lines
1.9 KiB
Python
62 lines
1.9 KiB
Python
5 years ago
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from django.core import signals
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from django.db.utils import (
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DEFAULT_DB_ALIAS, DJANGO_VERSION_PICKLE_KEY, ConnectionHandler,
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ConnectionRouter, DatabaseError, DataError, Error, IntegrityError,
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InterfaceError, InternalError, NotSupportedError, OperationalError,
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ProgrammingError,
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)
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__all__ = [
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'connection', 'connections', 'router', 'DatabaseError', 'IntegrityError',
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'InternalError', 'ProgrammingError', 'DataError', 'NotSupportedError',
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'Error', 'InterfaceError', 'OperationalError', 'DEFAULT_DB_ALIAS',
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'DJANGO_VERSION_PICKLE_KEY',
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]
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connections = ConnectionHandler()
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router = ConnectionRouter()
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class DefaultConnectionProxy:
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"""
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Proxy for accessing the default DatabaseWrapper object's attributes. If you
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need to access the DatabaseWrapper object itself, use
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connections[DEFAULT_DB_ALIAS] instead.
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"""
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def __getattr__(self, item):
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return getattr(connections[DEFAULT_DB_ALIAS], item)
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def __setattr__(self, name, value):
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return setattr(connections[DEFAULT_DB_ALIAS], name, value)
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def __delattr__(self, name):
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return delattr(connections[DEFAULT_DB_ALIAS], name)
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def __eq__(self, other):
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return connections[DEFAULT_DB_ALIAS] == other
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# For backwards compatibility. Prefer connections['default'] instead.
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connection = DefaultConnectionProxy()
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# Register an event to reset saved queries when a Django request is started.
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def reset_queries(**kwargs):
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for conn in connections.all():
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conn.queries_log.clear()
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signals.request_started.connect(reset_queries)
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# Register an event to reset transaction state and close connections past
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# their lifetime.
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def close_old_connections(**kwargs):
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for conn in connections.all():
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conn.close_if_unusable_or_obsolete()
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signals.request_started.connect(close_old_connections)
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signals.request_finished.connect(close_old_connections)
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