depth_field.py

class CustomDepthField(ToOneField):
    def should_be_full(bundle):
        if not bundle.request:
            return self.full
        if bundle.request.GET.get('with_entities', self.full) in (True, 'true', 'True', '1'):
            return True
        return False

    
    def dehydrate_related(self, bundle, related_resource):
        """
        Based on the ``full_resource``, returns either the endpoint or the data
        from ``full_dehydrate`` for the related resource.
        """
        if not self.should_be_full(bundle):
            # Be a good netizen.
            return related_resource.get_resource_uri(bundle)
        else:
            # ZOMG extra data and big payloads.
            bundle = related_resource.build_bundle(obj=related_resource.instance, request=bundle.request)
            return related_resource.full_dehydrate(bundle)