Opened 13 years ago
Closed 13 years ago
#17146 closed Cleanup/optimization (invalid)
Django docs possiable error
Reported by: | Owned by: | nobody | |
---|---|---|---|
Component: | Documentation | Version: | 1.3 |
Severity: | Normal | Keywords: | documentation |
Cc: | Triage Stage: | Unreviewed | |
Has patch: | no | Needs documentation: | no |
Needs tests: | no | Patch needs improvement: | no |
Easy pickings: | yes | UI/UX: | no |
Description
go to: https://docs.djangoproject.com/en/1.3/topics/db/queries/#complex-lookups-with-q-objects
and scroll down to:
Poll.objects.get( Q(question__startswith='Who'), Q(pub_date=date(2005, 5, 2)) | Q(pub_date=date(2005, 5, 6)) )
and it says it yealds the following SQL:
SELECT * from polls WHERE question LIKE 'Who%' AND (pub_date = '2005-05-02' OR pub_date = '2005-05-06')
Thats not true though is it? If it's Poll.objects.get(...
it's only going to get one object isn't it?
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It says 'roughly' translates, and it is correct.
get()
may or may not add a LIMIT clause (that's an implementation detail) - in fact it currently doesn't do any LIMIT clause, in order to be able to throw an exception when more than one object is matched.