#32079: Using JSONField with Func() crash when returns boolean.
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Reporter: Loic Quertenmont | Owner: nobody
Type: Bug | Status: closed
Component: Database layer | Version: 3.1
(models, ORM) |
Severity: Normal | Resolution: invalid
Keywords: | Triage Stage:
| Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Changes (by felixxm):
* status: new => closed
* resolution: => invalid
Comment:
Thanks for this report. It works in Django < 3.1.1 but not intentionally.
`Func()` guesses an output type based on `expressions` types, in this case
`JSONField`, PostgreSQL supports primitives in `jsonb` data type so it
treats the result of `jsonb_path_exists()` as a `JSONField`. As a
consequence of #31956, fetching a `JSONField` should return a string
instead of pre-loaded data that's why it crashes.
I don't think there is anything to fix here, you want to use
`jsonb_path_exists()` which takes JSON and returns boolean, so passing
`output_field=models.BooleanField()` should be necessary.
--
Ticket URL: <https://code.djangoproject.com/ticket/32079#comment:1>
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