Inconsistency on uploaded image format name

[Benjamin]

Hello,

on my code I intercept form data posted both from the admin and template frontend.
I need to catch the format name and use it in my code.

From the frontend, to get to this value from a submitted form request.FILES the path is:
image.image.format

From the admin, when submitting a new image in a field, saving, then intercepting the file with a save signal, from the instance, the path to the image format is:
image.file.image.format

I'm not sure this is intended.... anyway it can cause problem.

[Tim Graham]

I'm not sure how to reproduce the issue. In particular, where does the "format" attribute come from? I don't think it's part of Django. Is it possible this is related to a third-party library and not Django itself? If not, please include some more specific steps to reproduce the problem (models, view code, etc.) and reopen the ticket. Thank you.

[Benjamin]

Create a simple form on a template with an image field.
Submit form but don't save it, use commit=false.

Then inspect the 'request/FILES/0/image/format '
I believe this is part of Django isn't it ?
This format parameter also appear in other place of the request, such as in 'request/_files/0/image/format'

So it seems the format that is passed when submitting form from frontend template, and admin, doesn't use same path.
It's really minor issue, but for the sake of consistency, if it's related to django, it might deserve to get fixed.

[Tim Graham]

Here's what I see in request.FILES when uploading with the admin:

>>> request.FILES['image']
<TemporaryUploadedFile: IMG_1856.JPG (image/jpeg)>
>>> request.FILES['image'].image
<PIL.JpegImagePlugin.JpegImageFile image mode=RGB size=3072x2304 at 0x7FB23C047240>
>>> request.FILES['image'].image.format
'JPEG'

It's still not clear to me how to reproduce the problem in the report (or what the problem is). If you could use actual code instead of psuedocode, that would help clarify.

[Tim Graham]

I guess the other case you mentioned might be:

>>> new_object = form.save(commit=False)
<ImageModel: ImageModel object>
>>> new_object.image
<ImageFieldFile: IMG_1857.JPG>
>>> new_object.image.file
<TemporaryUploadedFile: IMG_1857.JPG (image/jpeg)>
>>> new_object.image.file.image
<PIL.JpegImagePlugin.JpegImageFile image mode=RGB size=3072x2304 at 0x7F2A9FD24128>
>>> new_object.image.file.image.format
'JPEG'

I don't see an inconsistency given these are two separate circumstances.