Django：从相关领域过滤模型

Question

In Django I have the following models: Person , Device , Consumption

A Person can have zero to many Devices
A Device can have zero to many Consumptions

How can I filter Persons on a value in Consumption?

I can filter on fields from Devices:

Person.objects.filter(device__is_active=True) 

But how can I filter on Consumption fields?

Answer 1

要获取一个Consumption对象（在本例中为其ID），请执行以下操作：

Person.objects.filter(device__consumptions__id=consumption_id)