Explain the Rails directory structure and purpose of key folders

beginner

Re-explain

rails new generates the same directory structure for every app, so developers know where code lives. The key folders are:

app/ holds the application code, with subfolders for models, views and controllers. helpers and assets have their own subfolders there too.
config/ holds the configuration, such as routes and database settings.
db/ holds the database schema, the migrations and the seed data.
lib/ holds your own modules and libraries.
public/ holds static files that the web server serves directly.
test/ or spec/ holds the tests.
vendor/ holds third-party code.
Gemfile lists the gem dependencies.

Rewriting in plainer words…

This answer doesn't lend itself to a diagram - it reads best . No credits were charged.

Why there's no diagram: “”

The interactive diagram is below the answer - jump to diagram ↓ · Below it, the related concept . Jump to it ↓

The diagram below the answer is the concept . Jump to it ↓

Tailored explanation · switch back to · ·

What should the new diagram focus on?

How well did you know this?

AI:

Saved in this browser - sign in to keep your review list.

How should your speech become text?

Listening… your words appear above as you speak - tap Stop when you're done.

Recording · cr - tap Stop & transcribe when you're done.

Transcribing with AI…

Voice:

Keep going - a few more words and AI can grade it.

Interview lens

Likely follow-ups, what you can say, and the weak answers to avoid.

Want a quick review of the fundamentals? See the Ruby on Rails cheatsheet.

Pro · $10/mo

Full answers, code samples, and AI explanations that go simpler or deeper. Cancel anytime.