Creating hierarchical categories with django-mptt

To illustrate how to deal with MPTT, we will build on top of the ideas app from Chapter 3, Forms and Views. In our changes, we will replace the categories with a hierarchical Category model and update the Idea model to have a many-to-many relationship with the categories. Alternatively, you can create the app from fresh, using only the content shown here, to implement a very basic version of the Idea model from scratch.

Getting ready

To get started, perform the following steps:

1. Install django-mptt in your virtual environment using the following command:

(env)$ pip install django-mptt==0.10.0

2. Create the categories and ideas apps if you have not done so already. Add...