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Fixed #22023 -- Raised an error for values() followed by defer() or only().

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Previously, doing so resulted in invalid data or crash.

Thanks jtiai for the report and Karol Jochelson,
Jakub Nowak, Loic Bistuer, and Baptiste Mispelon for reviews.
This commit is contained in:
Artur Frysiak 2014-02-15 22:44:14 +01:00 • committed by Tim Graham
parent a7639722f5
commit faf6a911ad
4 changed files with 34 additions and 3 deletions
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6
django/db/models/query.py
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@ -1060,6 +1060,12 @@ class ValuesQuerySet(QuerySet):
# QuerySet.clone() will also set up the _fields attribute with the
# names of the model fields to select.
def only(self, *fields):
raise NotImplementedError("ValuesQuerySet does not implement only()")
def defer(self, *fields):
raise NotImplementedError("ValuesQuerySet does not implement defer()")
def iterator(self):
# Purge any extra columns that haven't been explicitly asked for
extra_names = list(self.query.extra_select)