I want to use annotate and subquery to join tables.
Table1 in database1 and table2 in database2. But it's not work.
I got the error:
QuerySet.annotate() received non-expression(s): database1.
the code here:
from django.db.models import Subquery, OuterRef, Count from app1.models
import Table1 from app2.models import Table2 subquery = Table2.objects.
filter(table1_id=OuterRef('id')).values('table1_id').annotate(count=Count(
'id')).values('count') queryset =
Table1.objects.annotate(table2_count=Subquery(subquery,
output_field=models.IntegerField()), using='database1')
Could anyone help me?
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