#28797: Sum aggregation might return "-0.00" instead of None
-------------------------------------+-------------------------------------
Reporter: simhnna | Owner: nobody
Type: Bug | Status: new
Component: Database | Version: 1.11
layer (models, ORM) |
Severity: Normal | Keywords:
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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I have an application with the following Model:
{{{
class Split(models.Model):
amount = models.DecimalField(max_digits=10, decimal_places=2)
}}}
And perform the following query:
{{{
Split.objects.filter(...).aggregate(models.Sum('amount'))['amount__sum']
or 0
}}}
which returns the mentioned "-0.00" for specific filters. I'm not sure why
that happens.
A values_list for an example where it happens is here:
{{{
[29.63, -30.0, 155.5, -156.45, -0.08, 400.0, -400.0, 440.0, -463.98,
-10.0, -700.0, 735.0, -14.83, -150.0, 0.08, -9.5, -2.34, -62.82, -500.0,
735.0, -300.0, -500.0, 490.0, -170.6, -10.0, -300.0, -0.11, 735.0, 300.0,
-239.5]
}}}
The whole code is part of https://github.com/agstrike/silverstrike with
the query in
https://github.com/agstrike/silverstrike/blob/master/silverstrike/models.py#L54
If you point me at the right direction I might be able to debug a little
--
Ticket URL: <https://code.djangoproject.com/ticket/28797>
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