Question

所以我有一些像这样的代码：

objects_list = A.objects.filter(some_param = some_value)

for obj in objects_list:
    object = B.objects.get(pk=obj.another_param)
    #do stuff with the B object

有没有办法将它组合成一个查询或什么？怎么样？谢谢！

Answer 1

你可以这样做：

a_qs = A.objects.filter(some_param=some_value).values_list('another_param', flat=True)
b_qs = B.objects.filter(pk__in=a_qs)

for b in b_qs:
    #do stuff with b

或者，如果你想巩固：

b_qs = B.objects.filter(pk__in=A.objects.filter(some_param=some_value).values_list('another_param', flat=True))

for b in b_qs:
    #do stuff with b

我如何在Django中组合这些查询？

1 个答案: