sqlalchemy.orm.exc

module documentation

SQLAlchemy ORM exceptions.
Class ​Detached​Instance​Error An attempt to access unloaded attributes on a mapped instance that is detached.
Class ​Flush​Error A invalid condition was detected during flush().
Class ​Loader​Strategy​Exception A loader strategy for an attribute does not exist.
Class ​Object​Deleted​Error A refresh operation failed to retrieve the database row corresponding to an object's known primary key identity.
Class ​Object​Dereferenced​Error An operation cannot complete due to an object being garbage collected.
Class ​Stale​Data​Error An operation encountered database state that is unaccounted for.
Class ​Unmapped​Class​Error An mapping operation was requested for an unknown class.
Class ​Unmapped​Column​Error Mapping operation was requested on an unknown column.
Class ​Unmapped​Error Base for exceptions that involve expected mappings not present.
Class ​Unmapped​Instance​Error 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
NO_STATE =
Exception types that may be raised by instrumentation implementations.
Value
(AttributeError, KeyError)
@util.preload_module('sqlalchemy.orm.base')
def _default_unmapped(cls):

Undocumented

def _safe_cls_name(cls):

Undocumented