#34444: Summing through a One-to-Many relationship on the property of a
JSONField
fails
-------------------------------------+-------------------------------------
Reporter: Clément Escolano | Owner: nobody
Type: Bug | Status: new
Component: Database layer | Version: 4.1
(models, ORM) |
Severity: Normal | Resolution:
Keywords: | Triage Stage:
| Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Comment (by Clément Escolano):
OK, sorry for the trouble, I found a solution which is casting the
annotated field to `DecimalField`:
{{{
groups =
Group.objects.annotate(total=Cast(Sum("memberships__extra__amount"),
output_field=DecimalField()).all()
groups[0].total
}}}
I don't know if this is normal behaviour to require casting but I guess
this is OK for me
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Ticket URL: <https://code.djangoproject.com/ticket/34444#comment:2>
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