What code runs when you request a page from a Ruby on Rails application?
Here is an annotated trace showing every method call within Rails and its dependencies. It is for an example application that loads a blog post from the database and renders a page containing the post's title.
Here the show method in our PostsController is called. Our show method is empty since we've already loaded the record we want to show in a before_action and are relying on Rails's default rendering to render the correct view template for us.
Created by Chris Zetter in a tribute to Rails and its many contributors.
Read out more about how the trace was made.
You can see the code that powers this page and suggest resources to link to on GitHub.