[英]Django ORM get only field in foreignkey relationship
I have database tables like this 我有这样的数据库表
class Message(models.Model):
text = models.CharField(max_length=200)
length = models.CharField(max_length=100)
receivers = models.IntegerField()
class Network(models.Model):
name = models.CharField(max_length=100)
is_down = models.BooleanField(default=False)
class SMSLog(models.Model):
receiver = models.CharField(max_length=200)
message = models.ForeignKey(Message, related_name='log')
network = models.ForeignKey(Network)
status = models.CharField(max_length=200)
I need just three fields in my query ie text, log__receiver and log__network__name. 我在查询中只需要三个字段,即文本,log__receiver和log__network__name。 I tried like this 我尝试过这样
Message.objects.all().prefetch_related('log').only('text', 'log__receiver', 'log__network__name')
The above query does not work. 上面的查询不起作用。 How to do query like above in django ORM ? 如何在Django ORM中执行上述查询?
根据我的评论:使用values
而不是only
:
Message.objects.all().prefetch_related('log').values('text', 'log__receiver', 'log__network__name')
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