更换django自带的下载链接

 1 class Case(models.Model):
 2     file_type = MyFileField(verbose_name=‘file_obj‘, max_length=256, blank=True, null=True)
 3     link = models.CharField(verbose_name=‘下载链接‘, max_length=64, blank=True, null=True)
 4 
 5     def __unicode__(self):
 6         return u"%s" % self.file_type.name
 7 
 8 class MyFileField(models.FileField):
 9     attr_class = MyFieldFile
10 
11 class MyFieldFile(FieldFile):
12 
13     def __init__(self, *args, **kwargs):
14         super(MyFieldFile, self).__init__(*args, **kwargs)
15 
16     @property
17     def url(self):
18         return self.instance.link