rails_model_viz

https://github.com/PeterTakahashi/rails_model_viz

**Rails Model Viz** is a development tool that automatically visualizes your Rails application's models, associations, and (optionally) column details using Mermaid.js. This gem provides both a command-line task and a Rails Engine interface, allowing you to view interactive entity-relationship diagrams (ER diagrams) directly in your browser. It helps developers quickly understand, explore, and document the structure of their ActiveRecord models.