Comments on: Creating User Profiles with Image Thumbnails in Django

By: Lorenzo

Lorenzo — Mon, 03 May 2010 17:39:42 +0000

I make use of signals to handle thumb/post processing of images:
from django.db.models.signals import post_save
def image_postprocess(sender, instance=None, created=None, *args, **kwargs):
""" Image postprocessing """
...
post_save.connect(image_postprocessing, sender=Image)

It's more reusable than overriding the save() method

By: aaa35

aaa35 — Fri, 23 Apr 2010 02:27:26 +0000

Good!

By: itjobs1

itjobs1 — Thu, 03 Dec 2009 20:45:48 +0000

Thank you nice post

By: Mark

Mark — Sun, 16 Aug 2009 22:23:18 +0000

Hi there, great bit of coding you've done here. I've been trying to follow, but coming across some errors.

I'm not entirely sure if my installation is set up properly, or if it's a problem with the trunk version of Django.

When calling self.photo.path in the thumbnail creation, it seems to be getting my MEDIA_ROOT with the filename appended (ignoring any other bits of folder structure that has been set earlier). The only thing I can think of is if adding the upload_to instruction doesnt get recorded properly.

ie. MEDIA_ROOT/filename.jpg

Any thoughts? Feel free to drop me an email.

By: Oliland

Oliland — Thu, 16 Jul 2009 04:37:28 +0000

Fixed that for you

def save(self, force_insert=False, force_update=False):
import os
#get mtime stats from file
thumb_update = False

# Does a thumbnail exist?
if self.thumbnail:
# Does it actually exist?
try:
# If so, compare it to the latest photo
statinfo1 = os.stat(self.photo.path)
statinfo2 = os.stat(self.thumbnail.path)
if statinfo1 > statinfo2:
thumb_update = True
# If not, update the thumbnail
except OSError:
thumb_update = True

if self.photo and not self.thumbnail or thumb_update:
from PIL import Image

THUMB_SIZE = (150, 150)

#self.thumbnail = self.photo

image = Image.open(self.photo.path)

if image.mode not in ('L', 'RGB'):
image = image.convert('RGB')

image.thumbnail(THUMB_SIZE, Image.ANTIALIAS)
(head, tail) = os.path.split(self.photo.path)
(a, b) = os.path.split(self.photo.name)

if not os.path.isdir(head + '/thumbs'):
os.mkdir(head + '/thumbs')

image.save(head + '/thumbs/' + tail)

self.thumbnail = a + '/thumbs/' + b

super(UserProfile, self).save()