Entity relationship diagram

This module generates entity relationship diagram for chosen content entities. It was originally ported from Drupal 7 entitiesdiagram with several improvements.

Dependencies

Viz.js library (>=3.0)

Installation

This module can be installed using Composer.
So you will need to add the following to your composer.json file into the repositories section:

    {
        "type": "composer",
        "url": "https://asset-packagist.org"
    }

It's also needed to extend the 'installer-path' section with path to libraries folder in your Drupal root:

    "web/libraries/{$name}": [
        "type:drupal-library",
        "type:npm-asset"
    ],

And add a new 'installer-types' section next to the 'installer-path' in the 'extra' section:

    "installer-types": ["npm-asset"],

After this you can install the module and related Viz.js library using
composer require drupal/entity_relationship_diagram

UI Usage 

1. Go to `/admin/reports/entity-relationship-diagram` to see form with available content entity types.
2. Mark necessary for you entity types and press on create button.
3. Generates a graph in the PNG format.

CLI Usage 

Requirements :

• graphviz
• ttf-freefont (maybe required on Alpine Linux, but not on other distros)

Example to install requirements on Alpine Linux : apk add --update --no-cache graphviz ttf-freefont

Drush command : 

• drush entity_relationship_diagram:diagram | dot -Gratio=0.7 -Eminlen=2 -T png -o ./output.png

It is also possible to specify desired entity types:

• drush entity_relationship_diagram:diagram --entity_type=node,user,taxonomy_term | dot -Gratio=0.7 -Eminlen=2 -T png -o ./output.png