在django中更改上传文件的文件名 [英] In django changing the file name of an uploaded file

问题描述

是否可以在django中更改上传文件的文件名？我搜索，但找不到任何答案。

Is it possible to change the file name of an uploaded file in django? I searched, but couldn't find any answer.

我的要求是每当上传文件时，其文件名应以以下格式更改。

My requirement is whenever a file is uploaded its file name should be changed in the following format.

format = userid + transaction_uuid + file_extension

非常感谢...

推荐答案

您如何上传文件？
我假设使用 FileField 。

FileField.upload_to 表示 upload_to 字段，

也可以是可调用的，例如
函数，将被调用到
获取上传路径，包括
文件名。这个callable必须能够
接受两个参数，并返回一个
Unix风格的路径（带斜杠）
以传递到存储
系统。传递的
的两个参数是：

may also be a callable, such as a function, which will be called to obtain the upload path, including the filename. This callable must be able to accept two arguments, and return a Unix-style path (with forward slashes) to be passed along to the storage system. The two arguments that will be passed are:

实例：
的一个实例，其中 FileField 定义
。更具体地说，这是
在
当前文件被附加的特定实例。

"instance": An instance of the model where the FileField is defined. More specifically, this is the particular instance where the current file is being attached.

filename ：最初给文件的
的文件名。这可能是
，或者当
确定最终目的地
路径时，可能不会被考虑。

"filename":The filename that was originally given to the file. This may or may not be taken into account when determining the final destination path.

所以看起来你只需要做一个函数来处理你的名字并返回路径。

So it looks like you just need to make a function to do your name handling and return the path.

def update_filename(instance, filename):
    path = "upload/path/"
    format = instance.userid + instance.transaction_uuid + instance.file_extension
    return os.path.join(path, format)

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