metrics_extend_schema.py

from drf_spectacular.utils import OpenApiParameter, extend_schema, OpenApiExample, inline_serializer

		# Add this to the action in the UserViewSet
    @extend_schema(
        responses=inline_serializer(
            name="Empty serializer for example (Ignore this).",
            fields={"example": serializers.CharField()},
        ),
        examples=[
            OpenApiExample(
                "Example of metrics response.",
                value={"metric_1": 88.5, "metric_2": 25.0, "metric_3": 100.0},
                request_only=False,
                response_only=True,
            ),
        ],
    )
    @action(detail=False, methods=("GET",))
    def metrics(self, request):
        ...