Merge pull request IRIS-NITK#99 from IRIS-NITK/week3_assignment

Week 3

week_3/README.md

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+# Week 3 - Getting Started with Rails
+
+In this week we will get started with Rails.
+
+We will create a simple rails app with two pages, a Home Page and an About Me page.
+
+## Steps
+- [Set Up Local Workplace](../setup/)
+
+- Create a new [gemset](../setup/README.md#RVM) and install rails
+```bash
+cd week_3
+rvm gemset create week_3
+rvm use 3.0.5@week_3
+gem install rails --version 7.0.4
+```
+
+- Create a new Rails project `hello_world` in the directory `week_1`
+```bash
+rails new hello_world --css=bootstrap --skip-git
+cd hello_world
+rvm use 3.0.5@week_3
+```
+
+> The command `rails new` initialises a Rails project. We have passed
+> the flag `--skip-git` to avoid initializing Git again as we are
+> already within a Git repository.
+
+- Run the rails server using below command and go to http://localhost:3000/.
+```bash
+rails server
+```
+
+You should see the rails logo.
+
+### Add a controller
+
+- Generate a new controller `PageController` with actions `root` and
+  `about_me`:
+
+```bash
+rails generate controller Page root about_me
+```
+
+> A _controller_ is responsible for making sense of request and producing
+> the appropriate output. It acts as a middleman between the Data
+> (Model) and Presentation (View). Controllers are stored in
+> `app/controllers` directory.
+
+
+> The generator creates the files and fills it with some default code.
+> the above command creates a controller
+> `PagesController`, creates new view files `root.html.erb` and
+> `about_me.html.erb` and modifies the routes file
+
+- Edit the routes file (`config/routes.rb`) as follow to add new routes:
+
+```ruby
+Rails.application.routes.draw do
+  get '/', to: 'page#root'
+  get 'about_me', to: 'page#about_me'
+end
+```
+
+The routes file specifies the URLs that are recognized by the application.
+
+- Edit the view files `app/views/page/root.html.erb` and `app/views/page/about_me.html.erb`.
+
+- You should be able to see see your changes at `http://localhost:3000` and
+  `http://localhost:3000/about_me`.
+