How does path variable goes to params in rails-CodePudding

I am asking this question cause i guess i have not good understanding over how rails params works.

i want to know how the path variable goes to rails params or mapped to key and value in rails params. get 'x/y/:id' if i hit the url localhost:3000/x/y/2, here 2 will goes to params with key id: like params[id: 2]. How does it. Can anyone please help here to understand it.

CodePudding user response：

The URL http://localhost:3000/x/y/2 results in a request to port 3000 on your Rails server something like this:

GET /x/y/2 http/1.1
Host: localhost

The server receives the request and breaks it down into its parts.

scheme: http
version: 1.1
host: localhost
port: 3000
path: /x/y/2
method: GET

Rails compares the path to your routes, and sees it matches get '/x/y/:id'. 2 is set as params[:id]. Then it calls the controller method specified in by the route.

For more read Rails Routing from the Outside In and HTTP 1.1 Request Messages.

CodePudding user response：

Somehow the answer by @schwern is right but actual thing is happen under hood Rails.application.routes.recognize_path '/account/1', method: :get this will convert your path to {:controller=>"books", :action=>"check", :id=>"1"}