introduction to ruby on rails, creating a blog

1. One word … Beautiful

2.  Rails is a web application development
framework written in the Ruby language. It is
designed to make programming web
applications easier by making assumptions
about what every developer needs to get
started.

3.  DRY – “Don’t Repeat Yourself”
 Convention Over
 REST is the best pattern for web applications

4.  Rails installer
 Aaaaaaand it is done
 Update using
 Gem update --system
 Gem update

5.  Model : Data layer
 Views : Presentation layer
 Controller : Linking between mode and views

6. rails new blog

7.  cd blog
 rails server
 localhost:3000

8.  Delete public/index.html
 Generate index page
 rails generate controller home index
 set homepage
 root :to => "home#index"

9.  Create scaffold along with a model
 rails generate scaffold post name:string
title:string content:text
 rake db:migrate
 Add link to home page
 <%= link_to "My Blog", posts_path %>

10.  validates :name, :presence => true
 validates :title, :presence => true, :length
=> { :minimum => 5 }

11.  Create model
 rails generate model comment commenter:string
body:text post:references
 rake db:migrate
 Add repation to post model
 has_many :comments
 Add it as subresource to post
 resources :posts do
 resources :comments
 end
 Create controller
 rails generate controller Comments

12.  Add a comment:
 <%= form_for([@post,
@post.comments.build]) do |f| %>
 <%= f.label :commenter %>
 <%= f.text_field :commenter %>
 <%= f.label :body %>
 <%= f.text_area :body %>
 <%= f.submit %>
 <% end %>

13.  @post = Post.find(params[:post_id])
 @comment =
@post.comments.create(params[:comment])
 redirect_to post_path(@post)

14.  <h2>Comments</h2>
 <% @post.comments.each do |comment| %>
 Commenter: <%= comment.commenter %>
 Comment: <%= comment.body %>
 <br/>
 <% end %>

15.  Add user name and password
 http_basic_authenticate_with :name => “admin",
:password => “admin", :except => [:index, :show]

16.  Tags
 Comments moderation
 Images for post
 Attached youtube video to post
 Posts categories
 … what else ?

17.  Implement new ideas with your team
 Read
 http://haml.info/tutorial.html
 http://haml.info/docs/yardoc/file.REFERENCE.h
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