如何为使用 Django-CKEditor 上传的图像创建 uuid4 文件名？

Question

我想为使用 django-ckeditor/uploader 上传的图像创建随机 uid 文件名。

我在与settings.py 相同的文件夹中创建了utils.py：

import uuid

def get_name_uid():
    ext = filename.split('.')[-1]
    filename = "%s.%s" % (uuid.uuid4(), ext)
    return filename

我想将此“随机”文件名添加到settings.py：

CKEDITOR_FILENAME_GENERATOR = get_name_uid()

我该怎么做？我不确定如何获取在编辑器中上传的文件名。我应该将文件名从 settings.py 传递给 utils.py 吗？还是有其他方法可以做到这一点？

他们的文档说following：

``CKEDITOR_UPLOAD_PATH = "uploads/"``

When using default file system storage, images will be uploaded to "uploads" folder in your MEDIA_ROOT and urls will be created against MEDIA_URL (/media/uploads/image.jpg).

If you want be able for have control for filename generation, you have to add into settings yours custom filename generator.

```
# utils.py

def get_filename(filename):
    return filename.upper()
```

```
# settings.py

CKEDITOR_FILENAME_GENERATOR = 'utils.get_filename'
```

CKEditor has been tested with django FileSystemStorage and S3BotoStorage.
There are issues using S3Storage from django-storages.

Answer 1

文档中基本上都为您详细说明了：

def get_filename(filename):
    return filename.upper()  # returns the uppercase version of filename

所以示例函数get_filename 获取传入的上传文件名，您应该返回您想要的文件名。这就是我们所说的callback。

作为参数传入的回调被称为“回调签名”，文档清楚地说明了它得到了什么。

所以把函数放在它makes sense的地方。鉴于教程中概述的结构，我会选择 mysite/mysite/utils.py，标题为“让我们看看 startproject 创建了什么：”。所以在与settings.py 相同的目录中。我将其命名为 generate_uuid4_filename 和 mysite/mysite/utils.py 看起来像这样：

import uuid
import os.path

def generate_uuid4_filename(filename):
    """
    Generates a uuid4 (random) filename, keeping file extension

    :param filename: Filename passed in. In the general case, this will 
                     be provided by django-ckeditor's uploader.
    :return: Randomized filename in urn format.
    :rtype: str
    """
    discard, ext = os.path.splitext(filename)
    basename = uuid.uuid4().urn
    return ''.join(basename, ext)

现在更新您的settings.py：

# Near the rest of the CKEditor variables
CKEDITOR_FILENAME_GENERATOR = '<app_label>.utils.generate_uuid4_filename'

你就完成了。祝你好运！