I have an application where users can upload images, then the image is
renamed to a SHA256 hash of the file's contents.
Here is the relevant snippet of the model
class ImagePost(Post):
def imgurl(self, filename):
import hashlib, os.path
extension = os.path.splitext(filename)
self.image.seek(0)
return "images/%s%s" % (hashlib.sha256(self.image.read
(self.image.size)).hexdigest(), extension[1])
image = models.ImageField(upload_to=imgurl, blank=True)
what I am attempting to do is, if a user uploads an image that already
exists (i.e. the two files have the exact same SHA256 hash) I want to
have the ImageField point to the already existing file, rather than
save the newly uploaded one. I have tried a couple things that didn't
work, and the default behavior when dealing with files of the same
name is to append an extra _ to the end of the name, before the
extension.
I feel like I'm on the cusp of figuring this out, but I'm stuck. Also,
would I put the code for this into the imgurl() function, create a
custom storage object, in the view(s) directly?
Thank you for your help.
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