django-versioned-models 0.1.2

Drop-in versioning for Django models — releases, data status workflow, and CI integration

django-versioned-models

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django-versioned-models

Drop-in versioning for Django models. Every model that inherits from VersionedModel gets full release management, data status workflow, and CI integration — automatically.

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🚀 Features

• Release management - every row in every table is tagged to a release. Branch, lock, patch, and deprecate with simple commands.
• Data status workflow - DRAFT → FUTURE → APPROVED. CI only sees approved rows. Live edits by architects never break tests.
• Lock enforcement - locked releases are immutable at the model level. No edits, no deletes, from anywhere — Admin, API, or shell.
• Auto-discovery - inherit VersionedModel and your model is versioned. No registration needed, no matter how many models.
• Topological FK sort - when copying a release, models are duplicated in the correct dependency order automatically.
• Soft deprecation - old releases are hidden by default but data is always preserved and fully reversible.
• Standalone releases - create a release with no source for bootstrapping a new project or parallel versioning.
• CI-ready commands - create_release, approve_release, lock_release and more, ready to plug into any pipeline.

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Installation

pip install django-versioned-models

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Quick Start

1. Add to INSTALLED_APPS

INSTALLED_APPS = [
    ...
    'django_versioned_models',
]

2. Run migrations

python manage.py migrate

3. Create your models

from django_versioned_models.mixins import VersionedModel

class MyModel(VersionedModel):
    name = models.CharField(max_length=255)

    class Meta:
        unique_together = [('release', 'name')]  # unique per release, not globally

4. Run migrations for your models

python manage.py makemigrations
python manage.py migrate

5. Create the first release

python manage.py create_release --release-version v1.0.0

6. Add data, then lock

# Add data via Admin or API...

python manage.py lock_release --release-version v1.0.0

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Ongoing Flow

# Create a new release branched from the previous one
python manage.py create_release --release-version v1.1.0 --based-on v1.0.0

# Architects edit data (status=DRAFT by default)

# CI approves stable rows
python manage.py approve_release --release-version v1.1.0

# Run tests against approved data only
pytest --release-version v1.1.0

# Lock and ship
python manage.py lock_release --release-version v1.1.0

# Bug found after deployment? Create a patch — never modify a locked release
python manage.py create_release --release-version v1.1.1 --based-on v1.1.0

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How It Works

Every model that inherits from VersionedModel gets two fields added automatically:

• release — which version this row belongs to
• status — data readiness (draft / future / approved)

Data Status Workflow

DRAFT <-> FUTURE -> APPROVED  (one-way, CI only)

Status	Who	Meaning
DRAFT	Architects	Being worked on
FUTURE	Architects	Planned for a future release
APPROVED	CI only	Stable — what tests run against

CI always queries approved rows. DRAFT and FUTURE are invisible to CI — live edits never break tests.

MyModel.objects.approved(release)     # CI — stable rows only
MyModel.objects.for_release(release)  # everyone — all statuses

Lock Enforcement

Locked releases are immutable. Any attempt to save or delete a row in a locked release raises a ValidationError — from the Admin, the API, the shell, anywhere.

# This will raise ValidationError if release is locked
my_instance.save()
my_instance.delete()

Auto-Discovery

All models that inherit from VersionedModel are discovered automatically on every create_release. No manual registration needed. FK dependencies are resolved via topological sort — no ordering required.

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Management Commands

Command	Description
create_release --release-version v1.0.0	Create a standalone release (unlocked)
create_release --release-version v1.1.0 --based-on v1.0.0	Branch from a locked release
approve_release --release-version v1.1.0	Approve all DRAFT rows (CI only — FUTURE untouched)
lock_release --release-version v1.1.0	Lock a release (immutable)
unlock_release --release-version v1.1.0	Unlock (only before deployment)
deprecate_release --release-version v1.0.0	Soft-delete (data preserved, hidden by default)
deprecate_release --release-version v1.0.0 --undo	Restore a deprecated release

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Querying

from django_versioned_models.models import Release

release = Release.objects.get(version='v1.1.0')

# All rows for a release
MyModel.objects.for_release(release)

# Approved rows only (CI)
MyModel.objects.approved(release)

# Filter by status
MyModel.objects.filter(release=release, status='future')

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Imports Reference

from django_versioned_models.mixins import VersionedModel, DataStatus
from django_versioned_models.models import Release
from django_versioned_models.services import (
    get_versioned_models,
    get_versioned_models_ordered,
    create_release,
    lock_release,
)

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🤝 Contributing

Contributions are welcome! Please fork the repo, create a branch, and submit a pull request.

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📄 License

MIT License — see LICENSE for details.