如何让Django实现内部联接

Question

there are two tables:

class TBLUserProfile(models.Model):
    userid = models.IntegerField(primary_key=True)
    relmusicuid = models.IntegerField()
    fansnum = models.IntegerField()

class TSinger(models.Model):
   fsinger_id = models.IntegerField()
   ftbl_user_profile = models.ForeignKey(TBLUserProfile, db_column='Fsinger_id')

I want to get Tsinger info and then order by TBLUserProfile.fansnum, I know how to write sql query: select * from t_singer INNER JOIN tbl_user_profile ON (tbl_user_profile.relmusicuid=t_singer.Fsinger_id) order by tbl_user_profile.fansnum , but I don't want to use model raw function. relmusicuid is not primary key otherwise I can use ForeignKey to let it work. How can I use django model to achieve this？

Answer 1

You can do like this :

Tsinger.objects.all().order_by('ftbl_user_profile__fansnum')

For information about Django JOIN : https://docs.djangoproject.com/en/1.8/topics/db/examples/many_to_one/