#29271: Chaining Filters on a Reverse Foreign Key Produces Multiple Joins
-------------------------------------+-------------------------------------
Reporter: Michael MacIntosh | Owner: nobody
Type: Bug | Status: closed
Component: Database layer | Version: 2.0
(models, ORM) |
Severity: Normal | Resolution: invalid
Keywords: filter chain | Triage Stage: Accepted
reverse foreign key |
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Changes (by Simon Charette):
* status: new => closed
* resolution: => invalid
Comment:
This is expected behavior as per
[https://docs.djangoproject.com/en/dev/topics/db/queries/#spanning-multi-
valued-relationships spanning multi-valued relationships] as `beta` is a
reverse `ForeignKey` and thus multi-valued.
I'm not sure how we could give more visibility to this part of the
documentation as this keeps being reported as a bug given how unintuitive
it is. Maybe this could be mentioned in the
[https://docs.djangoproject.com/en/dev/ref/models/querysets/#filter
filter()] reference documentation?
--
Ticket URL: <https://code.djangoproject.com/ticket/29271#comment:3>
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