Rails comes with a schema.rb file that contains a clear definition of your database tables and how they're linked together. But what if you want to generate an entity-relationship diagram (ERD) of your Rails app to quickly get a sense of how they look?
Since we launched dbdiagram.io, a free and simple tool to draw entity relationship diagram 4 weeks back, we've been getting tons of feedback. Among those, a lot of people are asking if we support integrations with Rails, Django, or Laravel.
So today I'm excited to share that we've fulfilled one of the first steps: we now support Rails! If you are a Rails developer, you can quickly generate a database relationship diagram (or ERD diagram) from your schema.rb, in just 3 simple steps:
- Open dbdiagram.io
- Click Import → From Rails (schema.rb)
- Paste (or upload) your schema.rb
Some cool features that the tool has:
- Auto recognize your Rails relationship: It reads both explicit and implicit foreign key definitions (and convention), then translates them to the correct relationships. Explicit definitions like
t.references 'user'are recognized; implicit (convention) definition like
t.integer user_idare also recognized!
- You can generate a beautiful PDF file afterwards.
- It's completely free!
If you want to give it a try, go to dbdiagram.io and upload your schema.rb to see how your rails erd diagram look.
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