django-ognajd 0.2.0

Django app which handles ORM objects' versions.

ognajD^v0.2.0

Django app which handles ORM objects' versions.

Description

ognajD is Django-compactible application which handles versionning for ORM models. Main feature is for ognjaD to be a "plug-in" Django application, thus capable to work with "little-to-no" configuring and changes to Django project.

Features

ognajd stores objects' versions in own table, relied on contenttypes application.

ognajD @ v0.2.0 can:

• catch object's save / update signals
• store snapshot of object in DB with:
  • timestamp
  • serialized version
  • hash
• object version may be serialized (currently, only JSON) as:
  • diff with previous version (by default)
  • raw dumps
• inline with versione for admin models

Usage example

sample-project is a showcase django project, based on famous polls application. You can reference to it for usage cases, examples, testing.You must never deploy sample_project in production due to exposed SECRET_KEY.

Getting Started

Dependencies

Python packages

• django~=3.2.7 _{might work on lesser versions, not tested}
• jsondiff~=1.3.0 _{might work on lesser versions, not tested}

Django applications

• contenttypes

Installing

Using Python Package Index

• make sure to use latest pip:

  python3 -m pip install --upgrade pip
  

• install django-ognajd:

  python3 -m pip install django-ognajd
  

OR download package from releases

• download release asset (.tar.gz or .whl)

• make sure to use latest pip:

  python3 -m pip install --upgrade pip
  

• install django-ognajd from file:

  python3 -m pip install /path/to/downloaded/asset.tar.gz # or .whl
  

OR clone from repository

• clone project:

  git clone \
          --depth=1 \
          --branch=master \
          [e-mail]:omelched/django-ognajd.git \
          </path/to/downloads>
  

• move /django-ognajd/ognajd solely to folder containing django apps

  mv      </path/to/downloads>/django-ognajd/ognajd \
          </path/to/django/project/apps>
  

• remove leftovers

  rm -rf  </path/to/downloads>/django-ognajd
  

Configuring

Installing application

Add ognajd to INSTALLED_APPS in your Django project settings.py. Make sure it is installed before django.contrib.admin.

If you installed package the third way, </path/to/django/project/apps> must be added to PYTHONPATH. If you not sure add code below in your Django project manage.py before calling main():

sys.path.append('</path/to/django/project/apps>')

Registering models

To register your model as eligible for versioning add attribute-class VersioningMeta to model class definition. For typing, linters, autocompletion tyou can inherit from ognajd.models.VersioningMeta.

Then set preferred options.

e.g:

# .../your_app/models.py

from django.db import models

from ognajd.models import VersioningMeta


class Question(models.Model):
    
    class VersioningMeta(VersioningMeta):
        store_diff = False

    ... # fields' definitions

VersioningMeta options

Name	Description	Type	Default
enabled	True: if model will be versioned False: if will not	bool	True
store_diff	True: model's history will be stored as diffs False: as dumps	bool	True
save_empty_changes	True: if empty changes will be registered False: if will not	bool	True

Authors

@omelched (Denis Omelchenko)

Contributors

Changelist

ognajD version history and changelist available at releases page.

License

This project is licensed under the GNU APGLv3 License - see the LICENSE file for details.

Acknowledgments

Inspiration, code snippets, etc.

• polls showcase app code from sample-django
• index incrementer at model save from tinfoilboy