Django: Web Development with Python

Creating hierarchical categories

To illustrate how to deal with MPTT, we will create a movies app that will have a hierarchical Category model and a Movie model with a many-to-many relationship with the categories.

Getting ready

To get started, perform the following steps:

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

   (myproject_env)$ pip install django-mptt
   

2. Then, create a movies app. Add the movies app as well as mptt to INSTALLED_APPS in the settings, as follows:

   # conf/base.py or settings.py
   INSTALLED_APPS = (
       # ...
       "mptt",
       "movies",
   )

How to do it...

We will create a hierarchical Category model and a Movie model, which will have a many-to-many relationship with the categories, as follows:

1. Open the models.py file and ...