SQLAlchemy ORM exceptions.
alias of StaleDataError
Bases: sqlalchemy.exc.SQLAlchemyError
An attempt to access unloaded attributes on a mapped instance that is detached.
Bases: sqlalchemy.exc.SQLAlchemyError
A invalid condition was detected during flush().
Bases: sqlalchemy.exc.InvalidRequestError
A single database result was required but more than one were found.
Exception types that may be raised by instrumentation implementations.
Bases: sqlalchemy.exc.InvalidRequestError
A database result was required but none was found.
Bases: sqlalchemy.exc.InvalidRequestError
An refresh() operation failed to re-retrieve an object’s row.
Bases: sqlalchemy.exc.SQLAlchemyError
An operation cannot complete due to an object being garbage collected.
Bases: sqlalchemy.exc.SQLAlchemyError
An operation encountered database state that is unaccounted for.
Two conditions cause this to happen:
Bases: sqlalchemy.orm.exc.UnmappedError
An mapping operation was requested for an unknown class.
Bases: sqlalchemy.exc.InvalidRequestError
Mapping operation was requested on an unknown column.
Bases: sqlalchemy.exc.InvalidRequestError
Base for exceptions that involve expected mappings not present.
Bases: sqlalchemy.orm.exc.UnmappedError
An mapping operation was requested for an unknown instance.