Function no_dereference

mongoengine/context_managers.py:133–162

no_dereference context manager. Turns off all dereferencing in Documents for the duration of the context manager:: with no_dereference(Group): Group.objects()

(cls)

@contextlib.contextmanager
def no_dereference(cls):
    """no_dereference context manager.

    Turns off all dereferencing in Documents for the duration of the context
    manager::

        with no_dereference(Group):
            Group.objects()
    """
    try:
        cls = cls

        ReferenceField = _import_class("ReferenceField")
        GenericReferenceField = _import_class("GenericReferenceField")
        ComplexBaseField = _import_class("ComplexBaseField")

        deref_fields = [
            field
            for name, field in cls._fields.items()
            if isinstance(
                field, (ReferenceField, GenericReferenceField, ComplexBaseField)
            )
        ]

        _register_no_dereferencing_for_class(cls)

        with _no_dereference_for_fields(*deref_fields):
            yield None
    finally:
        _unregister_no_dereferencing_for_class(cls)


class no_sub_classes: