To clean these tables, we will create the file clean_model_app_remove.py and write the following: from django.contrib.contenttypes.models import ContentType # List of deleted apps DEL_APPS = ["app-you-deleted", "second-app-deleted"] # List of deleted models (that are not in the app deleted) In lowercase! Django is a high-level Python Web Development framework that encourages rapid development and clean, pragmatic design. Modeling polymorphism in relational databases is a challenging task. A file that is set as the FileField's default value will not be deleted. It has been built … File model-clean-errordict-4.diff, 7.0 KB (added by David Foster, 9 years ago) docs/releases/1.4.txt 477 477: This should make it easier to read when debugging interaction with: 478 478: client-side Javascript code. Call to full_clean will result in call to all clean_* methods; All methods will get called regardless of validation errors - get all errors at once; Auto mapping of errors to field names based on clean method names, if errors have no error_dict; Quickstart. Install Django Model Cleanup: pip install django-model-cleanup You’ll need to call it manually if you want to run model validation outside of a ModelForm. I've now updated my Trac profile with my email address. The django-cleanup app automatically deletes files for FileField, ImageField and subclasses. Generally you shouldn’t mind to keep a big amount of models migrations in your code base. Furthermore, Django provides generic form editing views that can do almost all the work to define pages that can create, edit, and delete records associated with a single model instance. Apparently it wasn't sufficient to add myself to the CC list to receive emails. Hopefully I should now receive email updates. Even though sometimes it causes some undesired effects, … P.S. Features. Creating and handling forms can be a complicated process! In this article, we present several modeling techniques to represent polymorphic objects in a relational database using the Django object-relational mapping ().This intermediate-level tutorial is designed for readers who are already familiar with the fundamental design of Django. Django Cleanup. Anyway, I've update the patch with unit tests, now that I've figured out how Django's unit tests work. When a FileField's value is changed and the model is saved, the old file is deleted.When a model that has a FileField is deleted, the file is also deleted. The Django documentation of Validating Objects is quoted in Django ticket #13100 as saying: Note that full_clean() will NOT be called automatically when you call your model’s save() method. Django makes it much easier by providing programmatic mechanisms to declare, render, and validate forms. (This is for backwards compatibility.) The Django migration system was developed and optmized to work with large number of migrations.