#26459: DecimalField float rounding
----------------------------------------------+--------------------
Reporter: yasondinalt | Owner: nobody
Type: Bug | Status: new
Component: Database layer (models, ORM) | Version: 1.9
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 1
Easy pickings: 0 | UI/UX: 0
----------------------------------------------+--------------------
DecimalField has weird behavior in case of float values passed to field.
If decimal_places = 1
float 2.15 will be saved as 2.1 (!)
float 2.25 will be saved as 2.2 (!)
But if float value first converted to str:
float 2.15 will be saved as 0.2 (ok)
float 2.25 will be saved as 0.2 (!)
It's because of default decimal rounding ROUND_HALF_EVEN.
As I understand build-in round() use rounding similar to ROUND_HALF_UP.
I tried first cast float to str, then use ROUND_HALF_UP, so now:
float 2.15 will be saved as 0.2 (ok)
float 2.25 will be saved as 0.3 (ok)
--
Ticket URL: <https://code.djangoproject.com/ticket/26459>
Django <https://code.djangoproject.com/>
The Web framework for perfectionists with deadlines.
--
You received this message because you are subscribed to the Google Groups
"Django updates" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to django-updates+unsubscr...@googlegroups.com.
To post to this group, send email to django-updates@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/django-updates/054.f981668fae30064528b2caa9bda9a918%40djangoproject.com.
For more options, visit https://groups.google.com/d/optout.
