#33232: DecimalField rounding error when upgrading from 3.1 to 3.2
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Reporter: Michał | Owner: nobody
Szczepańczyk |
Type: Bug | Status: new
Component: Database | Version: 3.2
layer (models, ORM) | Keywords: decimal,
Severity: Normal | decimalfield, rounding, postgres
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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Example:
{{{
from django.db import models
class Foo(models.Model):
amount = models.DecimalField(decimal_places=2, max_digits=12)
from myapp.models import Foo
f = Foo(amount='1.125')
f.save()
f.refresh_from_db()
# the issue is here
f.amount # returns Decimal('1.12') in 3.1 and Decimal('1.13') in 3.2
}}}
Executed query for 3.2:
{{{
INSERT INTO "myapp_foo" ("amount") VALUES (1.125) RETURNING
"myapp_foo"."id"
}}}
Executed query for 3.1:
{{{
INSERT INTO "myapp_foo" ("amount") VALUES ('1.12') RETURNING
"myapp_foo"."id"
}}}
Issue was reproduced only when using postgres database.
--
Ticket URL: <https://code.djangoproject.com/ticket/33232>
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