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How to generate class diagrams pictures in a Django/Open-edX project from console

A class diagram in the Unified Modeling Language (UML) is a type of static structure diagram that describes the structure of a system by showing the system’s classes, their attributes, operations (or methods), and the relationships among objects.

 https://github.com/django-extensions/django-extensions
Step 1:  Install django extensions

Command: pip install django-extensions

 Step 2: Add to installed apps

 
INSTALLED_APPS = (
    ...
    'django_extensions',
    ...
)

Step 3: Install diagrams generators
You have to choose between two diagram generators:
  • Graphviz or
  • Dotplus
before using the command or you will get:

python manage.py graph_models -a -o myapp_models.png

Note: I prefer to use pydotplus as it easier to install than Graphviz and its dependencies so we use pip install pydotplus.

Command:  pip install pydotplus

Step 4: Generate diagrams
Now we have everything installed and ready to generate diagrams using the command python manage.py graph_models



Command  :: python manage.py graph_models -a -o myapp_models.png




This will give use the entire Wagtail class diagram:

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