Class OuterRef

django/db/models/expressions.py:983–993

class OuterRef(F):
    contains_aggregate = False
    contains_over_clause = False

    def resolve_expression(self, *args, **kwargs):
        if isinstance(self.name, self.__class__):
            return self.name
        return ResolvedOuterRef(self.name)

    def relabeled_clone(self, relabels):
        return self


class Sliced(F):