#31755: make temporal subtraction work without ExpressionWrapper
-------------------------------------+-------------------------------------
Reporter: Sergey | Owner: nobody
Fedoseev |
Type: | Status: new
Uncategorized |
Component: Database | Version: master
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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{{{
class Experiment(models.Model):
start = models.DateTimeField()
end = models.DateTimeField()
Experiment.objects.annotate(
delta=F('end') - F('start') + Value(datetime.timedelta(),
output_field=DurationField())
)
}}}
This gives:
{{{
django.core.exceptions.FieldError: Expression contains mixed types:
DateTimeField, DurationField. You must set output_field.
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/31755>
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