#27594 closed Bug (fixed)
Reverse one to one related object populated from incorrect query columns
Reported by: | Daniel Hillier | Owned by: | Daniel Hillier |
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Component: | Database layer (models, ORM) | Version: | dev |
Severity: | Normal | Keywords: | onetoone reverse |
Cc: | daniel.hillier@… | Triage Stage: | Accepted |
Has patch: | yes | Needs documentation: | no |
Needs tests: | no | Patch needs improvement: | no |
Easy pickings: | no | UI/UX: | no |
Description (last modified by )
Extracting data for the related object from a queryset with a self referential one to one field gets the wrong data (incorrect columns) from the query when using a select_related with the reverse field.
The incorrect columns are introduced by the sqlcompiler mistaking the reverse select_related path as a part of a multiple concrete model inheritance structure.
Change History (7)
comment:1 by , 8 years ago
Description: | modified (diff) |
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Owner: | changed from | to
comment:2 by , 8 years ago
Triage Stage: | Unreviewed → Accepted |
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comment:3 by , 8 years ago
Patch needs improvement: | set |
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I left comments for improvement on the PR. Please uncheck "Patch needs improvement" after updating. A single squashed commit is fine. Thanks!
comment:4 by , 8 years ago
Patch needs improvement: | unset |
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Thanks for the review!
I've simplified the way I fixed the bug and implemented your suggestions.
I think the heart of the bug was the definition of from_parent
. A relationship between two models isn't from_parent
if the two model classes are the same. I've updated how from_parent
is defined to reflect that corner case.
Happy to incorporate any further changes you may have.
The proposed fix tests for self-referential relationships and avoids the multiple concrete model inheritance path in those instances.
PR