#28078: Could not use fileld as part of expression when annotate key shadows
model
field
-------------------------------------+-------------------------------------
Reporter: Pavel | Owner: nobody
Patrin |
Type: | Status: new
Uncategorized |
Component: Database | Version: 1.10
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 |
-------------------------------------+-------------------------------------
Could not use fileld as part of expression when annotate key shadows model
field
For example i have a model
{{{
class MyModel(Model):
grouping_field = TextField()
amount_field_1 = IntegerField()
amount_field_2 = IntegerField()
queryset = MyModel.objects.values('grouping_field')
# This is ok!
queryset.annotate(amount_field_1=Sum('amount_field_1'))
# This triggers error!
# {FieldError}Cannot compute Sum('<CombinedExpression:
F(amount_field_1) + F(amount_field_2)>'): '<CombinedExpression: ...>' is
an aggregate
queryset.annotate(
amount_field_1=Sum('amount_field_1'),
amount_field_2=Sum(F('amount_field_1') + F('amount_field_2')),
)
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/28078>
Django <https://code.djangoproject.com/>
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