#28988: Multi-table inheritance breaks GenericRelation querying
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Reporter: robwa | Owner: Paulo
Type: Bug | Status: assigned
Component: contrib.contenttypes | Version: 1.11
Severity: Normal | Resolution:
Keywords: | 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 robwa):
Now I can see why this happens:
* `GenericRelation` fields are created as ''private fields''.
* ''Private fields'' are explicitly inherited by child classes
([https://github.com/django/django/blob/649d5eaa8b7b224fc0eb8a3339a589288d5b10e8/django/db/models/base.py#L290
db.models.base]).
* When constructing the relation tree, ''private fields'' are included
([https://github.com/django/django/blob/649d5eaa8b7b224fc0eb8a3339a589288d5b10e8/django/db/models/options.py#L858
db.models.options]).
* When constructing the fields map, relations to ''private fields'' of
child classes simply overwrite the relations to the parents
([https://github.com/django/django/blob/649d5eaa8b7b224fc0eb8a3339a589288d5b10e8/django/db/models/options.py#L586
db.models.options]).
Where is the point to fix this?
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Ticket URL: <https://code.djangoproject.com/ticket/28988#comment:4>
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