Question

我有2个django模型：

class Message(models.Model):
    msg = models.CharField(max_length=200)
    date = models.DateTimeField(auto_now_add=True)

class Thread(models.Model):
    messages = models.ManyToManyField(Message)

是否可以通过Django ORM进行一次查询，相当于SQL：

SELECT   Message.msg, Message.date
FROM     Message, Thread
WHERE    Message.id IN Thread.messages
AND      Thread.id IN (1,2,3)
ORDER BY Message.date
LIMIT    10

Answer 1

messages = Message.objects.filter(thread__id__in=[1,2,3]).order_by('date')[:10]

使用in和order_by查询集方法，querying across a relationship in reverse和slicing to limit the results

如何使用Django ORM进行查询？

1 个答案: