Thanks Kelly, this looks like what I was looking for. Will give it a
try. So far my self implementation looks like this:
def medium_image(self):
return self.get_cache_image_path((400, 400))
def small_image(self):
return self.get_cache_image_path((128, 128))
def get_cache_image_path(self, size):
"""Create cached image file and return the path to this file"""
#split file path to list to separate folder and file
folder_file = self.image.__str__().split('/')
#get base filename with extension
file_name = folder_file.pop()
#get full folder name
folder_name = "/".join(folder_file)
#extract file extension from file name
extension = file_name[-3:]
#extract clean file name for cached file
cached_file_name = file_name[:-4]
#create unique cached file name from size
cached_file_name += "_%sx%s" % size
cached_file_name += ".%s" % extension
self.create_cached_image_file(cached_file_name, folder_name, size)
#return path to cached file
return settings.MEDIA_URL + folder_name + '/cache/' +
cached_file_name
def create_cached_image_file(self, cached_file, folder, cache_file_size):
"""Create cache folder and cache image file but only if they
don't exist already"""
cached_folder = settings.MEDIA_ROOT + folder + "/cache/"
#if cached folder does not exist create it
if not os.path.isdir(cached_folder):
os.mkdir(cached_folder)
#if file does not exist already then create it
if not os.path.isfile(cached_folder + cached_file):
im = Image.open(self.image.path)
im.thumbnail(cache_file_size, Image.ANTIALIAS)
im.save(cached_folder + cached_file)
This is within my model and in my template I can call
{{model.medium_image}} or {{model.small_image}}. Works so far but is not
"DRY" and also still I create a copy of each uploaded image. Will now
check sorl-thumbnail.
On 02/03/2013 05:49 PM, Kelly Nicholes wrote:
Check out sorl-thumbnail. https://github.com/sorl/sorl-thumbnail .
This lets you specify the desired size in a template.and can deal
with cropping. It caches the results so it doesn't have to regenerate
it each time.
On Saturday, February 2, 2013 1:33:36 PM UTC-7, nYmo wrote:
Hi all,
I'm new to django and also python but have already some
programming experience. I'm currently creating my first
application in django and get stucked because I'm looking for the
best way to resize uploaded images.
I'm already so far that I can upload/delete/update my images and
show them in my view. Now I want to resize the images for my view
and thought about the best way?
First question: Is it possible to resize the images on the fly?
For example I uploaded an image in 1920x1080px and now want to
transform it to 400x200 or something similar when the view is
being loaded? Is this a convenient way in django or not?
The only other way in my opinion could be to resize the image
during the file is being uploaded. What I don't like about this is
that I have more than one copy of one image only because of
different image sizes.
Any other thoughs?
I know that there are some nice packages out there where such
problems are already solved. But since I'm new to django I want to
learn by myself how to accomplish the basic stufff :)
Thanks in advance
Regards nymo
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