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Code Issues Releases Wiki Activity

Fixed #13750 -- Clarified need to reopen models.ImageField.image file to access raw image data.

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Hasan Ramezani 2019-10-25 14:57:37 +02:00 committed by Mariusz Felisiak
parent bf7b3e2750
commit f57e174fa6
1 changed files with 21 additions and 0 deletions
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docs/topics/files.txt
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@ -73,6 +73,27 @@ location (:setting:`MEDIA_ROOT` if you are using the default
>>> car.photo.path == new_path
True
.. note::
Whilst :class:`~django.db.models.ImageField` non-image data attributes,
such as ``height``, ``width``, and ``size`` are available on the instance,
the underlying image data cannot be used without reopening the image. For
example::
>>> from PIL import Image
>>> car = Car.objects.get(name='57 Chevy')
>>> car.photo.width
191
>>> car.photo.height
287
>>> image = Image.open(car.photo)
# Raises ValueError: seek of closed file.
>>> car.photo.open()
<ImageFieldFile: cars/chevy.jpg>
>>> image = Image.open(car.photo)
>>> image
<PIL.JpegImagePlugin.JpegImageFile image mode=RGB size=1600x1200 at 0x7F99A94E9048>
The ``File`` object
===================