Traffic flow

Subject: Traffic flow
Author: Linux
In response to: Step 2 -- Create a controller
Posted on: 09/12/2017 01:30:11 AM



                         /config/routes.rb     app/controllers/welcome_controller.rb    
http://localhost:3000/ -------------------->  ----------------------------------------> 
                                ^                     ^   
                                |                     |
                         root 'welcome#index'    def index
                                                  // default to view --> app/views/welcome/index.html.erb
                                                 end

>
> On 09/12/2017 01:16:04 AM Linux wrote:

-- administrator@ubuntu:$ cd blog -- administrator@ubuntu:~/blog$ rails generate controller Welcome index Running via Spring preloader in process 69075 create app/controllers/welcome_controller.rb route get 'welcome/index' invoke erb create app/views/welcome create app/views/welcome/index.html.erb invoke test_unit create test/controllers/welcome_controller_test.rb invoke helper create app/helpers/welcome_helper.rb invoke test_unit invoke assets invoke coffee create app/assets/javascripts/welcome.coffee invoke scss create app/assets/stylesheets/welcome.scss

This generated:
app/controllers/welcome_controller.rb -- a controller Welcome with action index
class WelcomeController < ApplicationController def index end end

app/views/welcome/index.html.erb -- a view associated with controller Welcome and its action index
<h1>Welcome#index</h1> <p>Find me in app/views/welcome/index.html.erb</p>

a routing instruction added into routing table config/routes.rb
Rails.application.routes.draw do get 'welcome/index' # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html end

Here, get 'welcome/index' maps the GET request http://<host>/welcome/index(or index.html) to controller welcome and action index.

The root request http://<host>/ is routed to the default "Rails Welcome Aboard!" page. If you want to map the root request to controller welcome and action index. You can add root 'welcome#index':
Rails.application.routes.draw do get 'welcome/index' root 'welcome#index' # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html end

References:

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