django-mptt2 0.2.1

Utilities for implementing Modified Preorder Tree Traversal with your Django Models and working with trees of Model instances.

django-mptt2

Based on the idea of the unmaintained django-mptt package i implemented this new code base to replace it.

Cause no other package fits all of my use cases, which are primary in fast reading tree’s from the database, i started working on this project.

There is an alternative to this package, called django-treebeard, which implements nested sets as well, but without a parent foreignkey.

Quick-Start

Install it as any other django app to your project:

$ pip install django-mptt2

Add django-mptt2 to INSTALLED_APPS:

INSTALLED_APPS = [
    # other apps
    "mptt2"
]

Inheritance from the abstract mptt2.models.Node Model:

from django.db import models
from mptt2.models import

class Genre(Node)
    name = models.CharField(max_length=50, unique=True)

Adding nodes:

from project.models import Genre

rock = Genre(name="Rock")
rock.insert_at() # it will become the root node without target parameter

metal = Genre(name="Metal")
metal.insert_at(target=rock) # it will become the last child from rock

alternative = Genre(name="Alternative")
alternative.insert_at(target=rock) # it will become the last child from rock, the right sibling of metal

For full usage description, please read the tutorial section of our documentation.