Support to perform query that includes select_for_update() and select_related()

[jamesbeith]

After reading this Row Locks With Joins Can Produce Surprising Results in PostgreSQL blog post I was curious as to whether I could reproduce this query using django-cte.

WITH c AS (
    SELECT * FROM car WHERE id = 1
    FOR NO KEY UPDATE
)
SELECT * FROM c
JOIN owner ON c.owner_id = owner.id;

Please see the test in this PR, however unfortunately it results in the following error.

TypeError: Cannot call select_related() after .values() or .values_list()

I can make the test pass by removing this qs._fields = () line from here but that unfortunately causes the test_django52_annotate_model_field_name_after_queryset test to fail with.

ValueError: The annotation 'id' conflicts with a field on the model.

Is there another way to get the same query I'm after using django-cte?