#33008: Document prefetch_related for GenericForeignKey - Object doesn't exist
behaviour
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Reporter: Martin Svoboda | Owner: nobody
Type: Cleanup/optimization | Status: new
Component: contrib.contenttypes | Version: 3.2
Severity: Normal | Resolution:
Keywords: Documentation | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by Simon Charette):
Looks like the fetching of the object is due to the logic in `__get__`
https://github.com/django/django/blob/54a30a7a00fea6c5e3702282ade6e0238e06de3b/django/contrib/contenttypes/fields.py#L231-L245.
Not sure how feasible it would be to change it without breaking backward
compatiblity though, you'd likely need to avoid passing `default=None` to
`get_cached_value` and differentiate the sentinel value from `None`.
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Ticket URL: <https://code.djangoproject.com/ticket/33008#comment:7>
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