Method undefer_group

lib/sqlalchemy/orm/strategy_options.py:689–720

Indicate that columns within the given deferred group name should be undeferred. The columns being undeferred are set up on the mapping as :func:`.deferred` attributes and include a "group" name. E.g:: session.query(MyClass).options(undefer_group("large

(self, name: str)

        )

    def undefer_group(self, name: str) -> Self:
        """Indicate that columns within the given deferred group name should be
        undeferred.

        The columns being undeferred are set up on the mapping as
        :func:`.deferred` attributes and include a "group" name.

        E.g::

            session.query(MyClass).options(undefer_group("large_attrs"))

        To undefer a group of attributes on a related entity, the path can be
        spelled out using relationship loader options, such as
        :func:`_orm.defaultload`::

            select(MyClass).options(
                defaultload("someattr").undefer_group("large_attrs")
            )

        .. seealso::

            :ref:`orm_queryguide_column_deferral` - in the
            :ref:`queryguide_toplevel`

            :func:`_orm.defer`

            :func:`_orm.undefer`

        """
        return self._set_column_strategy(
            (_WILDCARD_TOKEN,), None, {f"undefer_group_{name}": True}
        )

    def with_expression(
        self,