What Are All Those Folders?
The examples in this chapter have called programs in the script folder and modified files in the app and public folders. You might have noticed the large set of folders Rails created for an application. Weâll explore most of these in detail over the course of this book, but for now, hereâs a quick guide to whatâs there:
- app
Where you build your applicationâs core. It includes subfolders for controllers, helpers, models, and views.
- config
Hosts database configuration, URL routing rules, and the Rails environment structures for development, testing, and deployment.
- db
Provides a home to scripts used to manage relational database tables.
- doc
Collects documentation generated from Ruby code using RubyDoc. RubyDoc is a documentation generator for Ruby, much like JavaDoc. For a lot more information, see http://www.ruby-doc.org/.
- lib
Holds code that doesnât quite fit into the model, view, or controller classifications, typically code thatâs shared by these components or plug-ins you install. The tasks subdirectory contains Rake tasks for your application.
- log
Gathers log dataânot just errors, but very rich information on requests, how they were processed, how long it took to process them, and session data from the request.
- public
Contains things like stylesheets, images, JavaScript, and things like 404 Not Found error reporting pages.
- script
The home for the prebuilt code youâll be using to generate, run, and interact with large portions of your Rails application. ...
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