app/django/db/backends/dummy/base.py
author Madhusudan.C.S <madhusudancs@gmail.com>
Wed, 03 Jun 2009 23:38:02 +0530
changeset 2385 174e946039e0
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Introduced 'module_package' key in params dict to support modules in melange
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"""
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Dummy database backend for Django.
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Django uses this if the DATABASE_ENGINE setting is empty (None or empty string).
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Each of these API functions, except connection.close(), raises
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ImproperlyConfigured.
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"""
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from django.core.exceptions import ImproperlyConfigured
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from django.db.backends import *
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from django.db.backends.creation import BaseDatabaseCreation
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def complain(*args, **kwargs):
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    raise ImproperlyConfigured, "You haven't set the DATABASE_ENGINE setting yet."
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def ignore(*args, **kwargs):
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    pass
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class DatabaseError(Exception):
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    pass
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class IntegrityError(DatabaseError):
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    pass
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class DatabaseOperations(BaseDatabaseOperations):
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    quote_name = complain
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class DatabaseClient(BaseDatabaseClient):
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    runshell = complain
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class DatabaseIntrospection(BaseDatabaseIntrospection):
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    get_table_list = complain
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    get_table_description = complain
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    get_relations = complain
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    get_indexes = complain
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class DatabaseWrapper(object):    
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    operators = {}
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    cursor = complain
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    _commit = complain
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    _rollback = ignore
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    def __init__(self, *args, **kwargs):
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        super(DatabaseWrapper, self).__init__(*args, **kwargs)
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        self.features = BaseDatabaseFeatures()
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        self.ops = DatabaseOperations()
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        self.client = DatabaseClient()
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        self.creation = BaseDatabaseCreation(self)
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        self.introspection = DatabaseIntrospection(self)
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        self.validation = BaseDatabaseValidation()
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    def close(self):
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        pass