Automatically deletes old file for FileField and ImageField. It also deletes files on models instance deletion.
Django Cleanup
|Version| |Status| |License|
The django-cleanup app automatically deletes files for :code:
FileField, :code:
ImageFieldand subclasses. When a :code:
FileField's value is changed and the model is saved, the old file is deleted. When a model that has a :code:
FileFieldis deleted, the file is also deleted. A file that is set as the :code:
FileField's default value will not be deleted.
See Django Supported Versions_)
sorl-thumbnail_
easy-thumbnail_
In order to track changes of a :code:
FileFieldand facilitate file deletions, django-cleanup connects :code:
post_init, :code:
pre_save, :code:
post_saveand :code:
post_deletesignals to signal handlers for each :code:
INSTALLED_APPSmodel that has a :code:
FileField. In order to tell whether or not a :code:
FileField's value has changed a local cache of original values is kept on the model instance. If a condition is detected that should result in a file deletion, a function to delete the file is setup and inserted into the commit phase of the current transaction.
Warning! If you are using a database that does not support transactions you may lose files if a transaction will rollback at the right instance. This outcome is mitigated by our use of postsave and postdelete signals, and by following the recommended configuration below. This outcome will still occur if there are signals registered after app initialization and there are exceptions when those signals are handled. In this case, the old file will be lost and the new file will not be referenced in a model, though the new file will likely still exist on disk. If you are concerned about this behavior you will need another solution for old file deletion in your project.
::
pip install django-cleanup
Add
django_cleanupto the bottom of
INSTALLED_APPSin
settings.py
.. code-block:: py
INSTALLED_APPS = ( ..., 'django_cleanup.apps.CleanupConfig', )
That is all, no other configuration is necessary.
Note: Order of
INSTALLED_APPSis important. To ensure that exceptions inside other apps' signal handlers do not affect the integrity of file deletions within transactions,
django_cleanupshould be placed last in
INSTALLED_APPS.
If you notice that
django-cleanupis not removing files when expected, check that your models are being properly
loaded_:
You must define or import all models in your application's models.py or models/__init__.py. Otherwise, the application registry may not be fully populated at this point, which could cause the ORM to malfunction.
If your models are not loaded,
django-cleanupwill not be able to discover their
FileField's.
You can check if your
Modelis loaded by using
.. code-block:: py
from django.apps import apps apps.get_models()
This section contains additional functionality that can be used to interact with django-cleanup for special cases.
To facilitate interactions with other django apps django-cleanup sends the following signals which can be imported from :code:
django_cleanup.signals:
cleanup_pre_delete: just before a file is deleted. Passes a :code:
filekeyword argument.
cleanup_post_delete: just after a file is deleted. Passes a :code:
filekeyword argument.
Signals example for sorl.thumbnail:
.. code-block:: py
from django_cleanup.signals import cleanup_pre_delete from sorl.thumbnail import deletedef sorl_delete(**kwargs): delete(kwargs['file'])
cleanup_pre_delete.connect(sorl_delete)
There have been rare cases where the cache would need to be refreshed. To do so the :code:
django_cleanup.cleanup.refreshmethod can be used:
.. code-block:: py
from django_cleanup import cleanupcleanup.refresh(model_instance)
Ignore a model and do not perform cleanup when the model is deleted or its files change.
.. code-block:: py
from django_cleanup import cleanup@cleanup.ignore class MyModel(models.Model): image = models.FileField()
Install, setup and use pyenv_ to install all the required versions of cPython (see the
tox.ini_).
Setup pyenv_ to have all versions of python activated within your local django-cleanup repository. Ensuring that the python 3.8 that was installed is first priority.
Install tox_ on python 3.8 and run the :code:
toxcommand from your local django-cleanup repository.
This app requires the use of django.test.TransactionTestCase_ when writing tests.
For details on why this is required see
here_:
Django's :code:`TestCase` class wraps each test in a transaction and rolls back that transaction after each test, in order to provide test isolation. This means that no transaction is ever actually committed, thus your :code:`on_commit()` callbacks will never be run. If you need to test the results of an :code:`on_commit()` callback, use a :code:`TransactionTestCase` instead.
django-cleanup is free software under terms of the:
MIT License
Copyright (C) 2012 by Ilya Shalyapin, [email protected]
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
.. _django.test.TransactionTestCase: https://docs.djangoproject.com/en/stable/topics/testing/tools/#django.test.TransactionTestCase .. _pyenv: https://github.com/pyenv/pyenv .. _tox: https://tox.readthedocs.io/en/latest/
.. |Version| image:: https://img.shields.io/pypi/v/django-cleanup.svg :target: https://pypi.python.org/pypi/django-cleanup/ :alt: PyPI Package .. |Status| image:: https://travis-ci.org/un1t/django-cleanup.svg?branch=master :target: https://travis-ci.org/un1t/django-cleanup :alt: Build Status .. |License| image:: https://img.shields.io/badge/license-MIT-maroon :target: https://github.com/un1t/django-cleanup/blob/master/LICENSE :alt: MIT License