django admin中文输入编码错误

修改models里面的str方法，改为unicode

class Category(models.Model):
    name = models.CharField(max_length=20, verbose_name=u'类名')
    description = models.CharField(max_length=100, default='', verbose_name=u'描述')

    def __unicode__(self):
        return self.name

    class Meta:
        verbose_name = u'文章分类'
        verbose_name_plural = verbose_name