Hi,
For my application I created a custom ImageField (code below) as I need to
automatically generate a few different sets of thumbnails. I read the posts
on the requests for Django to delete old images when uploading, and was
blown away to see the request for that feature turned down. I still don't
know why anyone would want the old images that you have zero access to
(from ui) laying around when you change to a new one.
Anyway, this is my attempt to solve that oversight for my current
application. First I tried calling the ImageField.delete if on an instance
of the old image however that deletes the old and doesn't save the updated
new image. So I created a new method that only removes. (This code is
currently working how I need it to work)
On to the code:
fields.py
class ProfileThumbnailImageFieldFile(ImageFieldFile):
# code left out for creating the thumbnails
def remove_old_files(self):
if os.path.exists(self.path):
os.remove(self.path)
if os.path.exists(self.thumb_path_64x64):
os.remove(self.thumb_path_64x64)
class ThumbnailImageField(ImageField):
attr_class = ThumbnailImageFieldFile # This class definition left out
and is overridden for this example in __init__ when creating the field
models.py
class CustomUser(AbstractBaseUser):
picture = ThumbnailImageField(upload_to='upload_path',
attr_class=ProfileThumbnailImageFieldFile)
def __init__(self, *args, **kwargs):
super(CustomUser, self).__init__(*args, **kwargs)
# Store a reference of the original picture to allow for removing
it alter if updated.
if self.picture:
self._original_picture = self.picture
else:
self._original_picture = None
def save(self, *args, **kwargs):
if self._original_picture:
if self.picture and self.picture != self._original_picture:
self._original_picture.remove_old_files()
super(CustomUser, self).save(*args, **kwargs)
What has been some other ways to solve this kind of problem?
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