#24772 closed Bug (invalid)
Equality testing of deferred instances
| Reported by: | Josh Kupershmidt | Owned by: | nobody |
|---|---|---|---|
| Component: | Database layer (models, ORM) | Version: | dev |
| Severity: | Normal | Keywords: | |
| Cc: | Triage Stage: | Unreviewed | |
| Has patch: | no | Needs documentation: | no |
| Needs tests: | no | Patch needs improvement: | no |
| Easy pickings: | no | UI/UX: | no |
Description
I find this behavior quite surprising and unintuitive:
a = MyModel.objects.get(id=1)
b = MyModel.objects.defer('hugefield').get(id=1)
a == b # False
Tested on 1.6.3, though AFAICT the behavior should be the same in git master. I notice I'm not the only one who has gotten tripped up by this behavior. I haven't seen any comments suggesting this behavior is intentional, so I'm guessing it's an accident of how Model.__eq__ is implemented and how deferred instances get a new class, rather than a conscious choice.
Is there support for changing this behavior so that a would equal b in this example?
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Hi schmiddy,
This has been fixed in 6af05e7a0f0e4604d6a67899acaa99d73ec0dfaa which is included in 1.7.