Django ORM，以防万一

Question

I am trying to convert below given SQL query to Django ORM.

select usp.user_id from Class_A as usp join Class_B as au 
       on au.id = usp.user_id join Class_C as up 
       on up.user_id = au.id where up.type not in ('A','B','C') 
       and up.end_time > now() and up.user_id = usp.user_id 
       and usp.data_enabled=1 and (usp.item_state=3 or usp.item_state=4)  
       and usp.user_id=au.id and au.is_active=1

I need to filter out those rows whose type is not one of ('A', 'B', 'C')

I tried many combination but I am getting wrong result because I could not implement up.plan_type not in ('A','B','C') in right way. I tried using exclude() and ~Q() variable but they are not giving right result because they are excluding rows after doing all join operation, I need to exclude rows while doing join operation.

I tried this

ClassA.objects.exclude(user__classA_plans__plan_type__in = ['I', 'C', 'D']).filter(user__classA_plans__end_time__gte = datetime.now(),**query)

where classA_plans is related name.

Please help me on this.

Answer 1

Django ORM当前不支持条件连接，您将不得不重写查询，使用原始sql或切换到其他SQL或类似SQLAlchemy的ORM引擎。