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Change log

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  • Added support for setting IMAGEFIELD_AUTOGENERATE = False. Previously, only True or an iterable were supported.
  • Dropped compatibility with Python 3.8 and 3.9.
  • Added Python 3.13.

0.19 (2024-08-03)

  • Updated the pre-commit configuration, switched to biomejs.
  • Started using a process pool to process images in parallel in process_imagefields.
  • Added Django 5.1rc1 to the CI, removed 4.1 (3.2 is still there).
  • Attached signal handlers to model subclasses as well, so that proxy models are supported too.

0.18 (2023-12-07)

  • Added Python 3.12, Django 5.0.
  • Added an easy way to reduce the possibility of filename collisions. Unfortunately, the hashing scheme used by default has bad uniqueness properties. It's recommended to add IMAGEFIELD_BIN_DEPTH = 2 to your settings and regenerate all processed images, for example using process_imagefields --all. The default may change in the future. For now nothing changes, so there's no compatibility concerns.

0.17 (2023-09-25)

  • Added a force-WEBP spec.
  • Added Django 4.1 and 4.2, Python 3.11.
  • Dropped Django 4.0 from the CI (3.2 is still in there).
  • Switched to hatch and ruff.
  • Added globbing support to the process_imagefields management command.

0.16 (2022-05-04)

  • Raised the minimum Pillow version to 9.0.
  • Avoided a deprecation warning by using the PIL.Image.Resampling enum.

0.15 (2022-03-07)

  • Dropped support for Python < 3.8, Django < 3.2.
  • Added a simplistic workaround for IOError exceptions which still plague Pillow when saving some JPEG files.

0.14 (2021-12-23)

  • Renamed the main branch to main.
  • Reformatted the frontend code using prettier and checked it using ESLint.
  • Fixed a crash which happened when the PPOI field contained an invalid value.
  • Added saving files in their original format to verified. Previously, some images were accepted because they can be loaded but they could not be saved later.
  • Added Python 3.10, Django 4.0 to the CI.
  • Dropped support for Python 2.7, Django 1.11.
  • Added a warning when using ImageField(null=True).
  • Started using pre-commit.

0.13 (2021-02-03)

  • Started using ImageOps.exif_transpose introduced in Pillow 6.0 to autorotate images.
  • Allowed overriding the preview image for the form field by adding a "preview" spec to the field.
  • Added descriptions when raising AttributeError exceptions.
  • Fixed the alignment of file uploads when imagefields with PPOI widgets are used within a fieldbox in the admin interface.
  • Do not accept keys or attributes starting with underscores in the versatile image proxy.
  • Disallowed image format names starting with an underscore.
  • Added IMAGEFIELD_VALIDATE_ON_SAVE to skip image validation when using model-level methods. Only use this when you are absolutely 100% sure that the images you are adding can be processed by Pillow.
  • Switched from Travis CI to GitHub actions.

0.12 (2020-07-24)

  • BACKWARDS INCOMPATIBLE: Consolidated cache key generation in the versatile image proxy and the admin widget code. Already cached values will be checked again. Also, the cache timeout has been changed from infinite (in case of the versatile image proxy) and 30 days (in case of the admin widget) to a random value between 170 and 190 days. This can be overridden by specifying the timeout as IMAGEFIELD_CACHE_TIMEOUT. The setting may either be a value or a callable.
  • Fixed a pickle/unpickle crash.
  • Closed image files in more places to avoid resource warnings.
  • Dropped Django 1.8 from the build matrix. Supporting it in the testsuite became annoying.
  • Added verification of images even when not using forms.
  • Ensured that configured fallbacks are also processed by process_imagefields.
  • Silenced more warnings when running the testsuite and generally improved test coverage.
  • Avoided setting the image field files' value too early when using fallbacks.
  • Added a new process_png processor which converts PNGs using palettes to RGBA. This avoids ugly artefacts when resizing images.

0.11 (2020-01-27)

  • Changed the fallback facility to a keyword argument to the ImageField instance.
  • Changed processing context creation to assign the name field earlier.

0.10 (2020-01-24)

  • Added an experimental fallback facility for optional image fields.
  • Allowed processor specs to return another processor spec in turn. This allows layering processor specs.
  • Changed the image field to set image file's extensions depending on their image type. For example, a GIF uploaded as example.png will automatically be saved as example.gif.
  • Improved test coverage a bit.

0.9 (2020-01-22)

  • Fixed crashes because of image fields with None values.
  • Fixed a case where an unsupported image was not detected early enough.
  • Added a IMAGEFIELD_SILENTFAILURE setting for silent failure when processing images crashes. The default value of this setting is obviously False. This is mostly useful when adding django-imagefield to a project which already has images (which may not be processible by Pillow).
  • Fixed the image verification to accept CMYK images again.
  • Added Django 3.0 to the test matrix.
  • Removed Python 3.4 from the test matrix.
  • Ensure that icc_profile isn't passed if it is falsy. The WebP encoder didn't like icc_profile=None.
  • Stopped including image fields of swapped models in IMAGEFIELDS.
  • Replaced ugettext* with gettext*.
  • Added an experimental websafe processor spec.

0.8 (2019-06-21)

  • BACKWARDS INCOMPATIBLE: Changed processing to pass additional processors' arguments as positional arguments instead of as a single list. This change only affects custom processors, no changes are necessary for users of the library, except if for example you passed arguments to processors such as default, autorotate etc.
  • Fixed a test to assume less about the error message for corrupt images.
  • Localize the corrupt image validation errors.
  • Stopped calling the storage's delete() method for non-existing images.
  • Made the field resilient against NULL values from the database.

0.7 (2018-10-18)

  • Made error reporting in process_imagefields include more info.
  • Made image field validation catch errors while determining the image dimension too.
  • Fixed a problem where older versions of Django didn't allow specifying the chunk size for iterating over querysets.
  • Modified django-imagefield's internals to allow changing the type and extension of generated images by way of dynamically specifying the processing pipeline.
  • Changed the API of the get_image callable in processors to only return the image without the context (since the context is mutable and available already).

0.6 (2018-09-13)

  • Fixed a crash where unpickling image fields would fail.
  • Changed process_imagefields to skip exclude model instances with an empty image field.
  • Changed the thumbnail processor to not upscale images.
  • Made process_imagefields not load the whole queryset at once to avoid massive slowdowns while determining the width and height of images (if those fields aren't filled in yet).
  • Added housekeeping options to process_imagefields. The only method implemented right now is --housekeep blank-on-failure which empties image fields where processing fails.
  • Changed process_imagefields to process items in a deterministic order.
  • Clarified the processors spec documentation a bit and added an example how to write a processor of your own.

0.5 (2018-08-15)

  • Dropped support for using image fields without associated height and width fields, because it is almost (?) always a really bad idea performance-wise.
  • Fixed a bug where processed image names on Python 2 were different than those generated using Python 3. This bug affects only installations still using Python 2. Rerun ./manage.py process_imagefields --all after upgrading.

0.4 (2018-08-13)

  • Added compatibility with Django 1.8 for prehistoric projects.
  • Polished tests and docs a bit.

0.3 (2018-05-29)

  • BACKWARDS INCOMPATIBLE: Changed the filename generation method to preserve the filename part of the original file for SEO purposes etc. You should run ./manage.py process_imagefields --all, and optionally empty the __processed__ folder before doing that if you do not want to keep old images around.
  • Improved progress reporting in process_imagefields.
  • Added a call to instance.save() in process_imagefields so that width and height fields are saved (if any).
  • Added accept="image/*" attribute to the file upload widget.
  • Replaced the full image in the admin widget with an ad-hoc thumbnail.
  • Fixed a bug where blank imagefields would not work correctly in the administration interface.
  • Switched the preferred quote to " and started using black to automatically format Python code.

0.2 (2018-03-28)

  • Rename management command to process_imagefields, and add --all option to process all imagefields.
  • Fixed a bug where not all image fields from base classes were picked up for processing by process_imagefields.
  • Added the IMAGEFIELD_AUTOGENERATE setting, which can be set to a list of image fields (in app.model.field notation, lowercased) to only activate automatic processing of images upon model creation and update for a few specific fields, or to False to disable this functionality for all fields.
  • Added system checks which warn when width_field and height_field are not used.
  • Changed process_imagefields to process image fields in alphabetic order. Also, made cosmetic changes to the progress output.
  • Added a test which verifies that generating processed image URLs is not slowed down by potentially slow storages (e.g. cloud storage)
  • Fixed the PPOI JavaScript to not crash when some imagefields have no corresponding PPOI input.

0.1 (2018-03-27)

  • First release that should be fit for public consumption.