I'm in need of direction to access the temporary file that is stored
in memory or on disk from an ImageField/FileField so that I can read
it before it gets moved to its final location.

The topics I've found all deal with only modifying the storage path
based on other fields in a model.  My requirement is reading EXIF/IPTC/
XMP data to grab the Date created of a photo.

Providing a callable to "upload_to" gives an instance but the image
field doesn't have a file associated with it yet (working logically).
So how can I access the temporary memory or file to read it?

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