无法设置ImageField的url属性 [英] Can't set ImageField url attribute

问题描述

我想更改ImageField的属性，但是不断出现无法设置属性"错误.

I want to change my ImageField's attribute, however I'm constantly getting the Can't set attribute error.

我的模特是

class Society(models.Model):
     name = models.CharField(max_length=200)
     slug = models.SlugField(unique=True)
     summary = models.TextField(blank=True,null=True)
     members = models.ManyToManyField(User,null=True,blank=True)
     gallery = models.ForeignKey(Gallery,null=True,blank=True)
     avatar = models.ImageField(upload_to=get_society_path)

     def save(self,*args,**kwargs):
          super(Society, self).save(*args,**kwargs)
          fix_avatar_path(self)

     def clean(self):
          if self.id:
               self.avatar.path = get_society_path(self,self.avatar.path)
               save_thumb(self.avatar.path)

我的助手函数是:

def get_society_path(instance,filename):
     seperator_val = instance.id
     if seperator_val is None:
          seperator_val = get_time()
     return '%s/society_%s/%s' % (settings.UPLOAD_ROOT,seperator_val,time_to_name(filename))

def fix_avatar_path(instance):
     org_society_path = get_society_path(instance,instance.avatar.name)
     make_upload_dir(org_society_path)
     move(instance.avatar.path,org_society_path)
     os.rmdir(os.path.dirname(instance.avatar.path))
     instance.clean()

问题是:

我想将我的社团目录保存为society_society_id.但通常，在保存模型之前，我无法分配任何ID.所以我正在创建一个tmp文件，其名称是一个时间值.然后到达Societys文件夹，我想重命名该文件.所以，我的fix_avatar只是在保存社团后将tmp文件的内容移动到society_(society_id)文件夹中.到目前为止，一切都很好.但是，我所在社区的ImageField仍然保存以前创建的文件夹.为了更改其值，我发现我可以使用干净的方法.(从此

I want to save my society directories as society_society_id. But normally, I can't assign any id before the model is saved. So i'm creating a tmp file whose name is a time value.Then to reach societies folder, I want to rename this file. So, my fix_avatar simply moves the tmp file's content to society_(society_id) folder after the society is saved. So far so good everything works well. However, my society's ImageField still holds the previously created folder. In order to change it's value, I found that i can use clean method.(from this SO question) But still i'm getting the same result, the path doesn't change, and gives the "can't set attribute" response.

任何想法??

推荐答案

不确定，由于提出了此问题，因此在Django中是否进行了更改.关于此操作的故障单仍然存在: https://code.djangoproject.com/ticket/15590

Not sure, if this was ever changed in Django since this question was asked. A ticket about this not being possible still exists: https://code.djangoproject.com/ticket/15590

但是，您实际上可以通过执行以下操作来更改路径:

However, you actually can change the path by doing it like this:

self.avatar = 'uploads/example/path/'

工作还做什么?

self.avatar.name = 'uploads/example/path/'

它为我们工作了好几次.

It has worked for us in several occasions.

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