django orm 通过related_name反向查询的方法

class level(models.Model): l_name = models.CharField(max_length=50,verbose_name="等级名称") def __str__(self):  return self.l_name  class userinfo(models.Model): u_name = models.CharField(max_length=50,verbose_name="用户名称") u_level = models.ForeignKey(level,related_name="lev")  def __str__(self):  return self.u_name

userinfo.object.get(pk=1).u_level

level.objects.get(pk=1).lev.all()