77 lines
2.3 KiB
Python
77 lines
2.3 KiB
Python
"""
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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("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 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 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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_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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_enter_transaction_management = complain
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_leave_transaction_management = ignore
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set_dirty = complain
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set_clean = complain
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commit_unless_managed = complain
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rollback_unless_managed = 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(self)
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self.ops = DatabaseOperations(self)
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self.client = DatabaseClient(self)
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self.creation = DatabaseCreation(self)
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self.introspection = DatabaseIntrospection(self)
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self.validation = BaseDatabaseValidation(self)
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def is_usable(self):
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return True
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