我是Django的新手 . 我有一个mySQL查询：
SELECT username, foto FROM a INNER JOIN b ON (a.user_id = b.id) INNER JOIN c ON (a.foto_id = c.id)
如何在Django中编写它？
楷模：
class b(models.Model):
username = models.CharField(max_length=30)
email = models.CharField(max_length=30)
password = models.CharField(max_length=30)
class c(models.Model):
user_id = models.IntegerField()
foto = models.FileField(upload_to='documents')
created_at = models.DateTimeField(auto_now_add=True)
class a(models.Model):
user_id = models.IntegerField()
foto = models.ForeignKey('c', blank=True, null=True)
created_at = models.DateTimeField(auto_now_add=True)
1 回答
我想你正在寻找select_related()：