django-picklefield

import os from django.db import models from picklefield.fields import PickledObjectField # Configure Django for a minimal setup (usually done in settings.py) os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'myproject.settings') # This is a dummy settings file for demonstration. In a real project, # ensure 'picklefield' is in INSTALLED_APPS. # A real settings.py would look something like: # INSTALLED_APPS = ['django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'picklefield', 'myapp'] # DATABASES = {'default': {'ENGINE': 'django.db.backends.sqlite3', 'NAME': ':memory:'}} # SECRET_KEY = 'insecure-dev-key' class MyModel(models.Model): data = PickledObjectField(compress=True) def __str__(self): return f"MyModel with data: {self.data}" # Example Usage (assuming Django setup is complete, e.g., via manage.py shell) if __name__ == '__main__': # This part would typically be run within a Django shell or application context # For a standalone runnable example, mocking Django ORM is complex. # The following illustrates usage, but won't run directly without a full Django setup. # Create a dummy class to demonstrate pickling custom objects class CustomObject: def __init__(self, name, value): self.name = name self.value = value def __repr__(self): return f"CustomObject(name='{self.name}', value={self.value})" print("To run this, ensure Django is configured and 'picklefield' is in INSTALLED_APPS.") print("Then run `python manage.py shell` and execute the following:") print(" from myapp.models import MyModel") print(" from myapp.quickstart import CustomObject") # assuming this code is in myapp/quickstart.py print(" obj = MyModel() obj.data = {'list': [1, 2, {'a': 3}], 'custom': CustomObject('test', 123)} obj.save() retrieved_obj = MyModel.objects.first() print(f'Stored data: {retrieved_obj.data}') print(f'Type of retrieved data: {type(retrieved_obj.data)}') print(f'Type of custom object: {type(retrieved_obj.data["custom"])}')")