Rails Realtime ERD

Live Mermaid ERD viewer for any Rails app, mounted as a real-time route, powered by Hotwire.

What you get

• Mounts /rails/erd automatically in development and test environments
• On-the-fly introspection: no pre-generated HTML to keep in sync with schema.rb
• Mermaid ERD rendered client-side, with filters / options / zoom / pan
• Copy Mermaid code, Copy Markdown, Copy shareable URL (state in location.hash)
• Download SVG / PNG of the rendered diagram
• Sidebar filter to scope the diagram to a subset of models
• Works with any host asset pipeline (Sprockets, Propshaft, importmap, or none) — all CSS/JS is inlined by the engine layout

Mounting it

# Gemfile
gem "rails-realtime-erd"

# config/routes.rb
mount RailsRealtimeErd::Engine, at: "/rails-realtime-erd"

Details

29 stars on GitHub · MIT licensed · maintained by jacksonpires. Source: https://github.com/jacksonpires/rails-realtime-erd