[英]Django select_related filter
I have the following Django models. 我有以下Django模型。
class A(models.Model):
tmp = models.ForeignKey(B)
active = models.BooleanField()
class B(models.Model):
active = models.BooleanField()
archived = models.BooleanField()
Now I have the following query. 现在我有以下查询。
A.objects.select_related(B).filter(active=True)
Now this fetches all the objects of B. Now how can I include a filter of active=True
and archived=False
in the select_related
clause for model B
. 现在,这将获取B的所有对象。现在,如何在模型
B
的select_related
子句中包含active=True
和archived=False
的过滤器。
The same as you would with any other related field, with a __
lookup.. 与使用
__
查找的任何其他相关字段相同
A.objects.select_related(B).filter(active=True, tmp__active=True, tmp__archived=False)
Using select related doesn't change anything here, its purpose is about what information is returned with the results, it has no effect on filtering at all. 使用select related不会在这里改变任何东西,它的目的是关于结果返回什么信息,它根本不影响过滤。
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