#16172: Filtering queryset using Q objects to find objects with two specific
values
on the same many:many relationship returns 0 results
-------------------------------------+-------------------------------------
Reporter: | Owner: nobody
mpdaugherty | Status: closed
Type: Bug | Component: Database layer
Milestone: | (models, ORM)
Version: 1.3 | Severity: Normal
Resolution: invalid | Keywords:
Triage Stage: | Has patch: 0
Unreviewed | Needs tests: 0
Needs documentation: 0 | Easy pickings: 0
Patch needs improvement: 0 |
UI/UX: 0 |
-------------------------------------+-------------------------------------
Changes (by mpdaugherty):
* ui_ux: => 0
Comment:
Thanks, kmtracey. I just came back to write the same thing; after finding
that the Django unit tests specifically check for the behavior I thought
was a bug, I reread
https://docs.djangoproject.com/en/dev/topics/db/queries/#spanning-multi-
valued-relationships in more detail and finally understood the design
decision.
I'm working on a project that gives users the ability to create arbitrary
queries through the data, so our initial approach was to create a UI for
this and then serialize their queries into Q objects. However, it sounds
like we'll have to do something more complex, because not every query can
be expressed as a single .filter(Q) expression.
--
Ticket URL: <https://code.djangoproject.com/ticket/16172#comment:2>
Django <https://code.djangoproject.com/>
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