[英]How can I include null values in arithmetic query in django
I have the field called surface_area
which is null and float. 我有一个名为
surface_area
,它是null和float。
Now I can't set that to default 0
because 0 means something else in business rules. 现在我无法将其设置为
default 0
因为0表示业务规则中的其他内容。
I want to perform query like this 我想执行这样的查询
Room.objects.filter(surface_area__lte=40)
But this does not include null values. 但这不包括空值。
How can I include null values as well for lte queries 如何为lte查询包含空值
You can check for null
values like: 您可以检查以下
null
值:
Room.objects.filter(surface_area__isnull=True)
And combine that with your lte
: 并将其与你的
lte
结合起来:
from django.db.models import Q
Room.objects.filter( Q(surface_area__lte=40) | Q(surface_area__isnull=True) )
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