django重载str 浅谈django 重载str 方法

class EmailVerifyRecord(models.Model):
  code = models.CharField(max_length=20, verbose_name= u"验证码")
  email = models.EmailField(max_length=50, verbose_name=u"邮箱")
  send_type = models.CharField(choices=(("register",u"注册"),("forget",u"找回密码")), max_length=10 ,verbose_name=u"发送类型")
  send_Time = models.DateTimeField(default=datetime.now, verbose_name=u"添加时间")
 
  class Meta:
    verbose_name = u"邮箱验证码"
    verbose_name_plural = verbose_name
  #新增如下代码
  def __str__(self):
    return '{0}({1})'.format(self.code ,self.email)

class BanjiManager(models.Manager):
  def get_queryset(self):
    return super(BanjiManager, self).get_queryset().filter(DQSZJ='2016')
 
 
class StuBK_banji(models.Model):
  #rid = models.IntegerField(_(u'序号'),primary_key=True)
  FY = models.CharField(_(u'学院'),max_length=40)
  BH = models.CharField(_(u'班级'),max_length=40, blank=True)
  DQSZJ = models.CharField(_(u'年级'),max_length=40, blank=True)
 
  objects = BanjiManager()
  def __str__(self):
    return self.FY+'_'+self.BH
 
 
  class Meta:
    verbose_name = u"班级（从教务处数据提取）"
    verbose_name_plural = verbose_name