#34634: Creating objects with nested MTI crashes.
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Reporter: Mariusz Felisiak | Owner: Akash
| Kumar Sen
Type: Bug | Status: assigned
Component: Database layer | Version: 4.2
(models, ORM) |
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 1 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by Simon Charette):
> The values are empty strings in the query 1, So I don't think this gives
the expected results. The name and address should have their respective
values instead of empty strings.
Right I missed that. So no more crash but wrong behaviour.
> Along with the field place_ptr , the following fields, i.e all the
fields of Place model seems to be <django.db.models.fields.AutoField: id>,
<django.db.models.fields.CharField: name>,
<django.db.models.fields.CharField: address> present twice without any
conflicts or errors. So I think it would make sense if we disallow the
case-4 according to comment:8
I'm not sure I understand why this is the case. When
`ItalianRestaurantManyParents(ItalianRestaurant, Place)` is defined it
requires creating two parent links, `italianrestaurant_ptr ->
ItalianRestaurant` and `place_ptr -> Place`. The only attribute conflict
should be between `ItalianRestaurantManyParents.place_ptr` and
`Restaurant.place_ptr` in this case, all the other fields are only defined
once on the `Place` model and nowhere else.
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Ticket URL: <https://code.djangoproject.com/ticket/34634#comment:13>
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