django-undo-revision 1.0.0

Django reusable app for revision-based undo functionality with django-simple-history

django-undo-revision

A Django reusable app for revision-based undo functionality, built on top of django-simple-history.

How it works

Every mutation is wrapped in a revision — a unit that can be rolled back atomically with a single undo_last_revision(project) call. A revision automatically groups all historical records (creates, updates, deletes) made within its context.

Installation

pip install django-undo-revision

Add to INSTALLED_APPS:

INSTALLED_APPS = [
    ...
    "django.contrib.contenttypes",
    "simple_history",
    "undo_revision",
]

Run migrations:

python manage.py migrate

Configuration

In settings.py, set the project model (the entity revisions are scoped to):

UNDO_REVISION_PROJECT_MODEL = "myapp.Project"  # required

# URL kwarg used by UndoRevisionMixin to extract the project id
UNDO_REVISION_PROJECT_URL_KWARG = "project_id"

# HTTP methods that should open a revision (default: all mutating methods)
UNDO_REVISION_HTTP_METHODS = ["post", "put", "patch", "delete"]

Usage

1. Inherit models from HistoricalModel

from undo_revision.models import HistoricalModel

class Document(HistoricalModel):
    title = models.CharField(max_length=255)
    body = models.TextField()

HistoricalModel wires up RevisionHistoricalRecords (an extension of HistoricalRecords) and RevisionQuerySet.

2. Open a revision around mutations

from undo_revision.revision.context import open_revision

with open_revision(project_id=project.id):
    doc.title = "New title"
    doc.save()
    other_obj.delete()
# All changes inside the block are grouped into one revision

If no changes were recorded inside the block, the revision is deleted automatically.

3. Undo the last revision

from undo_revision.revision.undo import undo_last_revision, RevisionNotFoundError

try:
    undo_last_revision(project)
except RevisionNotFoundError:
    print("Nothing to undo")

The function fetches the latest revision for the project and rolls back all its changes in reverse chronological order.

4. Auto-open revisions via mixin (DRF / CBV)

from undo_revision.revision.mixins import UndoRevisionMixin
from rest_framework.viewsets import ModelViewSet

class DocumentViewSet(UndoRevisionMixin, ModelViewSet):
    project_url_kwarg = "project_id"  # URL kwarg carrying the project id
    ...

The mixin wraps all mutating methods (post, put, patch, delete) with open_revision automatically.

5. Bulk operations

RevisionQuerySet exposes helpers for bulk mutations:

MyModel.objects.bulk_create_with_history(objs)
MyModel.objects.bulk_update_with_history(objs, fields=["title"])

# Skip history (not tracked in any revision)
MyModel.objects.bulk_create_without_history(objs)
MyModel.objects.bulk_update_without_history(objs, fields=["title"])
MyModel.objects.create_without_history(title="...")
MyModel.objects.filter(...).delete_without_history()

License

MIT