[Django]-How to create uuid4 file names for images uploaded with Django-CKEeditor?

It’s basically all spelled out for you in the docs:

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

So the example function get_filename gets the uploaded filename passed in and you’re supposed to return the filename you want it to be. This is what we call a callback.

What the callback gets passed in as arguments is called the “callback signature” and the docs specify neatly what it gets.

So put the function in a place where it makes sense. I would choose mysite/mysite/utils.py given the structure outlined in the tutorial, under the heading “Let’s look at what startproject created:“. So in the same directory as settings.py. I would name it generate_uuid4_filename and mysite/mysite/utils.py would look like this:

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)

Now update your settings.py:

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

And you’re done. Good luck!