1. Junli Blog
Cocoa on Rails
3rd
2011-7-18

2. Blog

4. >rails new blog

5. Gems
>cd blog
>bundle install

6. SQLite3

7. >rake db:create

8. Web
>rails server
or
>rails s

9. http://127.0.0.1:3000
127.0.0.1
3000

10. Say hello
>rails generate controller home index
app/views/home/index.html.erb
index.html.erb
<h1> Hello, Junli </h1>

11. public/index.html

12. config/routes.rb
root
root :to => “home#index”
Rails root home controller

13. Post
>rails generate scaffold Post name:string
title:string content:text
rake db:migrate

14. Comment model
>rails generate model Comment
commenter:string body:text post:references
rake db:migrate
rails generate

15. comment.rb
app/models/comment.rb
class Comment < ActiveRecord::Base
belongs_to :post
end

16. Models
Models (post) (comment)

17. Models post.rb
post.rb
class Post < ActiveRecord::Base
...
has_many :comments
end
@post.comments

18. config/route.rb
resources :post do
resources :comments
end

19. Controller
>rails generate controller Comments

20. Post show
app/views/posts/show.html.erb
http://dpaste.com/hold/570758/

21. CommentsController
create action
class CommentsController < ApplicationController
def create
@post = Post.find(params[:post_id])
@comment = @post.comments.create(params[:comment])
redirect_to post_path(@post)
end
end

22. Done
Post

23. Blog
https://github.com/snowdon/blog