Opened 5 years ago

Last modified 5 years ago

#31963 closed Bug

Django: Nested OuterRef not woking to access grandparent's ID — at Initial Version

Reported by: Ashish Kulkarni Owned by: nobody
Component: Database layer (models, ORM) Version: 2.2
Severity: Normal Keywords: OuterRef, QuerySet, Django Filter, Annotation
Cc: Triage Stage: Unreviewed
Has patch: no Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no
Pull Requests:How to create a pull request

Description

Trying to access FeeAccount model's id using OuterRef in a nested subquery, but not immediate parent. Throwing:

ValueError: This queryset contains a reference to an outer query and may only be used in a subquery.

`
first_unpaid_fee_schedule_instalment = Subquery(FeeScheduleInstalment.objects \

.annotate(

total_balance = Subquery(

FeeInstalmentTransaction.objects.filter(

account_id=OuterRef(OuterRef('id')), # not working: need grand-parent's id here
instalmentschedule=OuterRef('id'), #working: parent's id

) \
.values('balance') \
.annotate(total_balance=Sum('balance')) \
.values('total_balance')

)

) \
.values('id')[:1]

)

fee_accounts_with_first_unpaid = FeeAccount.objects \

.annotate(

first_unpaid_schedule = first_unpaid_fee_schedule_instalment,

)
`

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