sqlalchemy.orm.exc

module documentation
(source)

SQLAlchemy ORM exceptions.

Exception DetachedInstanceError An attempt to access unloaded attributes on a mapped instance that is detached.
Exception FlushError A invalid condition was detected during flush().
Exception LoaderStrategyException A loader strategy for an attribute does not exist.
Exception ObjectDeletedError A refresh operation failed to retrieve the database row corresponding to an object's known primary key identity.
Exception ObjectDereferencedError An operation cannot complete due to an object being garbage collected.
Exception StaleDataError An operation encountered database state that is unaccounted for.
Exception UnmappedClassError An mapping operation was requested for an unknown class.
Exception UnmappedColumnError Mapping operation was requested on an unknown column.
Exception UnmappedError Base for exceptions that involve expected mappings not present.
Exception UnmappedInstanceError An mapping operation was requested for an unknown instance.
Constant NO_STATE Exception types that may be raised by instrumentation implementations.
Function _default_unmapped Undocumented
Function _safe_cls_name Undocumented
Type Variable _T Undocumented
NO_STATE = (source)

Exception types that may be raised by instrumentation implementations.

Value
(AttributeError, KeyError)
@util.preload_module('sqlalchemy.orm.base')
def _default_unmapped(cls: Type[Any]) -> Optional[str]: (source)

Undocumented

def _safe_cls_name(cls: Type[Any]) -> str: (source)

Undocumented

_T = (source)

Undocumented

Value
TypeVar('_T',
        bound=Any)