项目中需要将model的id拼接在图片上,作为图片路径的一部分。实现思路是,动态修改ImageField中的upload_to关键字:

关键代码如下

def   custom_upload_path(instance, filename):

     class_name= instance.__class__.__name__.lower()

      return  "{}/{}-{}/{}".format(class_name+"s",class_name, instance.pk, filename)

调用:

class   Temple(models.Model):

        image = models.ImageField(upload_to=custom_upload_path)#TODO

       def __str__(self):

          returnself.name

class   Monk(models.Model):

       image = models.ImageField(upload_to=custom_upload_path)#TODO

     def __str__(self):

        returnself.name