Django ORM: Equivalent of SQL `NOT IN`? `exclude` and `Q` objects do not work

I think the easiest way to do this would be to define a custom lookup, similar to this one or the in lookup

from django.db.models.lookups import In as LookupIn

class NotIn(LookupIn):
    lookup_name = "notin"

    def get_rhs_op(self, connection, rhs):
        return "NOT IN %s" % rhs

Field.register_lookup(NotIn)

or

class NotIn(models.Lookup):
    lookup_name = "notin"

    def as_sql(self, compiler, connection):
        lhs, params = self.process_lhs(compiler, connection)
        rhs, rhs_params = self.process_rhs(compiler, connection)
        params.extend(rhs_params)

        return "%s NOT IN %s" % (lhs, rhs), params

then use it in your query:

query = (
    JobLog.objects.values(
        "username", "job_number", "name", "time",
    )
    .filter(time__gte=start, time__lte=end, event="delivered")
    .filter(
        job_number__notin=models.Subquery(
            JobLog.objects.values_list("job_number", flat=True).filter(
                time__gte=start, time__lte=end, event="finished",
            )
        )
    )
)

this generates the SQL:

SELECT
    "people_joblog"."username",
    "people_joblog"."job_number",
    "people_joblog"."name",
    "people_joblog"."time"
FROM
    "people_joblog"
WHERE ("people_joblog"."event" = delivered
    AND "people_joblog"."time" >= 2020 - 03 - 13 15:24:34.691222 + 00:00
    AND "people_joblog"."time" <= 2020 - 03 - 13 15:24:41.678069 + 00:00
    AND "people_joblog"."job_number" NOT IN (
        SELECT
            U0. "job_number"
        FROM
            "people_joblog" U0
        WHERE (U0. "event" = finished
            AND U0. "time" >= 2020 - 03 - 13 15:24:34.691222 + 00:00
            AND U0. "time" <= 2020 - 03 - 13 15:24:41.678069 + 00:00)))