Generate Entity-Relationsip-Diagrams (ERD) from a Rails app

Use gem rails-erd to generate Entity-Relationship-Diagrams (ERD) from your Rails app

Usage #

1. Add the gem to Gemfile

   gem 'rails-erd', group: :development
   

2. Install graphviz dependency in the console

   sudo apt-get install graphviz
   

3. Now when you run

   bundle exec erd
   

It will generate erd.pdf in the root folder of your Rails app.

Here are some examples of what it can look like:

Advanced usage #

You can also create an .erdconfig file in the root folder and add some configs