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Project Description

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

Project home: http://github.com/django-mptt/django-mptt/

Documentation: http://django-mptt.github.io/django-mptt/

Discussion group: http://groups.google.com/group/django-mptt-dev

What is Modified Preorder Tree Traversal?

MPTT is a technique for storing hierarchical data in a database. The aim is to make retrieval operations very efficient.

The trade-off for this efficiency is that performing inserts and moving items around the tree is more involved, as there’s some extra work required to keep the tree structure in a good state at all times.

Here are a few articles about MPTT to whet your appetite and provide details about how the technique itself works:

What is django-mptt?

django-mptt is a reusable Django app which aims to make it easy for you to use MPTT with your own Django models.

It takes care of the details of managing a database table as a tree structure and provides tools for working with trees of model instances.

Requirements

  • Python 2.7 or 3.2+
  • A supported version of Django (currently 1.8+)

Feature overview

  • Simple registration of models - fields required for tree structure will be added automatically.
  • The tree structure is automatically updated when you create or delete model instances, or change an instance’s parent.
  • Each level of the tree is automatically sorted by a field (or fields) of your choice.
  • New model methods are added to each registered model for:
    • changing position in the tree
    • retrieving ancestors, siblings, descendants
    • counting descendants
    • other tree-related operations
  • A TreeManager manager is added to all registered models. This provides methods to:
    • move nodes around a tree, or into a different tree
    • insert a node anywhere in a tree
    • rebuild the MPTT fields for the tree (useful when you do bulk updates outside of django)
  • Form fields for tree models.
  • Utility functions for tree models.
  • Template tags and filters for rendering trees.
  • Admin classes for visualizing and modifying trees in Django’s administration interface.
Release History

Release History

0.8.6

This version

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0.8.5

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0.8.4

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0.8.3

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0.8.2

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0.8.1

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0.8.0

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0.7.4

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0.7.3

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0.7.2

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0.7.1

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0.7.0

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0.6.1

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0.6.0

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0.5.5

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0.5.4

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0.5.3

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0.5.2

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0.5.1

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0.5.0

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0.4.2

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0.4.1

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0.4.0

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0.3.1

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0.3.0

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0.2.1

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0.2

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0.1

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Download Files

Download Files

TODO: Brief introduction on what you do with files - including link to relevant help section.

File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
django_mptt-0.8.6-py2.py3-none-any.whl (221.0 kB) Copy SHA256 Checksum SHA256 2.7 Wheel Aug 23, 2016
django-mptt-0.8.6.tar.gz (122.6 kB) Copy SHA256 Checksum SHA256 Source Aug 23, 2016

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