Method _mapper_zero

lib/sqlalchemy/orm/context.py:1599–1601

return the Mapper associated with the first QueryEntity.

(self)

            return None

    def _mapper_zero(self):
        """return the Mapper associated with the first QueryEntity."""
        return self._entities[0].mapper

    def _entity_zero(self):
        """Return the 'entity' (mapper or AliasedClass) associated