Comments on: Django Thumbnails

By: Tom Coote

Tom Coote — Wed, 30 Nov 2011 13:15:42 +0000

You can call save on the field to store the file to disk without saving the model instance. The model instance get’s saved via calling super at the end so I’d place this logic at the top of the function but after the noResizing if statement block…

if not self.photo.size:
self.photo.save(self.photo.name, self.photo, save=False)

I’ve not tested this but I think size will only be present if the file exists in storage. Then calling save on the photo attribute will save it to disk but because you’ve given it the key word argument save=False then it doesn’t actually save the model instance because we do that later anyway.

By: el

el — Wed, 30 Nov 2011 12:54:29 +0000

Do u have maybe some suggestions for resolve this problem? How to save this file or get path from field before save?

By: Tom Coote

Tom Coote — Wed, 30 Nov 2011 12:46:14 +0000

Ah right I see. A bit of a flaw in the logic there. I guess I must have always been using this on an image that is already saved to disk.

By: el

el — Wed, 30 Nov 2011 12:20:32 +0000

Sory of comment under comment , but I forget:

Only if I will write before line imgFile = Image.open(self.photo.path):

self.photo.save(self.photo.name,self.photo,save=True)

then I can open file with Image.open(self.photo.path)

By: el

el — Wed, 30 Nov 2011 12:18:28 +0000

I have coppied this code, and run, then I have error in line:

imgFile = Image.open(self.photo.path) , because :

def save(self, area=CROP_SIZE, crop=False, noResizing=False):

if noResizing:
super(Example, self).save()
return

here we have no Resizing=False, so ‘if’ block will not execute his body it’s ok, but the rest part of code will be, and in line:

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

django says: I cannot open Image that doesn’t exist on path : self.photo.path . Why? Because it is not saved.

By: Tom Coote

Tom Coote — Wed, 30 Nov 2011 12:02:25 +0000

If noResizing=False then it doesn’t try and manipulate the image so it doesn’t matter if it doesn’t exist. That key word argument is there to allow you to save without doing any custom image manipulation.

By: el

el — Wed, 30 Nov 2011 11:55:59 +0000

It doesn’t work, because when you have noResizing=False, then photo is not saved and in line:

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

u have Image that doesn’t exist

By: Arthur

Arthur — Fri, 19 Aug 2011 15:01:17 +0000

Good stuff! now will test using S3 storage, but it seems that all is going to work fine! thanks!

By: Stefan Manastirliu

Stefan Manastirliu — Mon, 24 Jan 2011 11:47:59 +0000

This is exactly what i was looking for! Thanks for sharing it!