I have a query where it looks like Django 1.3 is generating incorrect
sql. It involves these four models.
class Aaa(models.Model):
pass
class Bbb(models.Model):
aaa = models.ForeignKey(Aaa, related_name='bbbs')
class Ccc(models.Model):
bbb = models.ForeignKey(Bbb, related_name='cccs')
class Ddd(models.Model):
aaa = models.ForeignKey(Aaa, related_name='ddds')
passed = models.BooleanField()
So here's the query; I expect it to give me the number of cccs that
are not attached to a non-passed ddd.
I [1]: Ccc.objects.exclude(bbb__aaa__ddds__passed=False).count()
Here's the sql generated by django, from connection.queries:
SELECT COUNT(*)
FROM "myapp_ccc"
INNER JOIN "myapp_bbb" ON ("myapp_ccc"."bbb_id" = "myapp_bbb"."id")
WHERE NOT (("myapp_bbb"."aaa_id" IN (SELECT U1."id"
FROM
"myapp_bbb" U1
INNER
JOIN "myapp_aaa" U2 ON (U1."aaa_id" = U2."id")
INNER
JOIN "myapp_ddd" U3 ON (U2."id" = U3."aaa_id")
WHERE
U3."passed" = false ) AND "myapp_bbb"."aaa_id" IS NOT NULL))
It looks like the inner select statement returns a list of bbb ID's,
but the WHERE NOT condition asks if a aaa id is in the list of bbb
ID's, which doesn't make any sense. Basically, it should say:
WHERE NOT (("myapp_bbb"."id" IN (SELECT U1."id"....
What do you think? Is this a bug?
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