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74 lines
2.2 KiB
Python
74 lines
2.2 KiB
Python
5 years ago
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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(), raise
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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.base.base import BaseDatabaseWrapper
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from django.db.backends.base.client import BaseDatabaseClient
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from django.db.backends.base.creation import BaseDatabaseCreation
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from django.db.backends.base.introspection import BaseDatabaseIntrospection
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from django.db.backends.base.operations import BaseDatabaseOperations
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from django.db.backends.dummy.features import DummyDatabaseFeatures
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def complain(*args, **kwargs):
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raise ImproperlyConfigured("settings.DATABASES is improperly configured. "
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"Please supply the ENGINE value. Check "
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"settings documentation for more details.")
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def ignore(*args, **kwargs):
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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 DatabaseCreation(BaseDatabaseCreation):
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create_test_db = ignore
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destroy_test_db = ignore
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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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get_key_columns = complain
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class DatabaseWrapper(BaseDatabaseWrapper):
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operators = {}
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# Override the base class implementations with null
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# implementations. Anything that tries to actually
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# do something raises complain; anything that tries
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# to rollback or undo something raises ignore.
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_cursor = complain
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ensure_connection = complain
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_commit = complain
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_rollback = ignore
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_close = ignore
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_savepoint = ignore
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_savepoint_commit = complain
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_savepoint_rollback = ignore
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_set_autocommit = complain
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# Classes instantiated in __init__().
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client_class = DatabaseClient
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creation_class = DatabaseCreation
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features_class = DummyDatabaseFeatures
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introspection_class = DatabaseIntrospection
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ops_class = DatabaseOperations
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def is_usable(self):
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return True
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