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  • Version de la documentation : 1.8

Code source de django.db

from django.core import signals
from django.db.utils import (DEFAULT_DB_ALIAS, DJANGO_VERSION_PICKLE_KEY,
    DataError, OperationalError, IntegrityError, InternalError, ProgrammingError,
    NotSupportedError, DatabaseError, InterfaceError, Error, ConnectionHandler,

__all__ = [
    'backend', 'connection', 'connections', 'router', 'DatabaseError',
    'IntegrityError', 'InternalError', 'ProgrammingError', 'DataError',
    'NotSupportedError', 'Error', 'InterfaceError', 'OperationalError',

connections = ConnectionHandler()

router = ConnectionRouter()

# `connection`, `DatabaseError` and `IntegrityError` are convenient aliases
# for backend bits.

# DatabaseWrapper.__init__() takes a dictionary, not a settings module, so
# we manually create the dictionary from the settings, passing only the
# settings that the database backends care about. Note that TIME_ZONE is used
# by the PostgreSQL backends.
# We load all these up for backwards compatibility, you should use
# connections['default'] instead.
class DefaultConnectionProxy(object):
    Proxy for accessing the default DatabaseWrapper object's attributes. If you
    need to access the DatabaseWrapper object itself, use
    connections[DEFAULT_DB_ALIAS] instead.
    def __getattr__(self, item):
        return getattr(connections[DEFAULT_DB_ALIAS], item)

    def __setattr__(self, name, value):
        return setattr(connections[DEFAULT_DB_ALIAS], name, value)

    def __delattr__(self, name):
        return delattr(connections[DEFAULT_DB_ALIAS], name)

    def __eq__(self, other):
        return connections[DEFAULT_DB_ALIAS] == other

    def __ne__(self, other):
        return connections[DEFAULT_DB_ALIAS] != other

connection = DefaultConnectionProxy()

# Register an event to reset saved queries when a Django request is started.
def reset_queries(**kwargs):
    for conn in connections.all():

# Register an event to reset transaction state and close connections past
# their lifetime.
def close_old_connections(**kwargs):
    for conn in connections.all():
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