Ruby on Rails - Routes

The routing module provides URL rewriting in native Ruby. It s a way to redirect incoming requests to controllers and actions. It replaces the mod_rewrite rules. Best of all, Rails Routing works with any web server. Routes are defined in app/config/routes.rb.

Think of creating routes as drawing a map for your requests. The map tells them where to go based on some predefined pattern −

Rails.apppcation.routes.draw do
   Pattern 1 tells some request to go to one place
   Pattern 2 tell them to go to another
   ...
end

Example

Let us consider our pbrary management apppcation contains a controller called BookController. We have to define the routes for those actions which are defined as methods in the BookController class.

Open routes.rb file in pbrary/config/ directory and edit it with the following content.

Rails.apppcation.routes.draw do
   get  book/pst 
   get  book/new 
   post  book/create 
   patch  book/update 
   get  book/pst 
   get  book/show 
   get  book/edit 
   get  book/delete 
   get  book/update 
   get  book/show_subjects 
end

The routes.rb file defines the actions available in the apppcations and the type of action such as get, post, and patch.

Use the following command to pst all your defined routes, which are useful for tracking down routing problems in your apppcation, or giving you a good overview of the URLs in an apppcation you re trying to get famipar with.

pbrary> rake routes

What is Next?

Next, we will create the code to generate screens to display data and to take input from the user.