本文介绍了Django查询在哪里的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

如何使用django对象查询:

How to do this using django object query:

 SELECT * FROM test WHERE (test_id IN (SELECT test_id FROM test_subject_set)) AND (test_begin_time < '') AND (test_end_time > '')

模型: / p>

The model:

class Test(models.Model):
    id = models.AutoField(primary_key=True)
    user = models.ForeignKey(User)
    groups = models.ManyToManyField(Group)


class TestSubjectSet(models.Model):
    id =  models.AutoField(primary_key=True)
    test = models.ForeignKey(Test)


推荐答案

两个查询器是这样做的方式。这将是一个数据库命中。

Two querysets is documented way of doing this. It will be one database hit anyway.

test_ids = Subject.objects.all()
result = Test.objects.filter(test_id__in=test_ids).filter([some other filtering])

这篇关于Django查询在哪里的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

08-18 13:00