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Login/Logout, Sign Up
$ rails g resource user email:string name:string password:string
$ rails g controller sessions

Model
User (email, name, password...)

Controller Controller
SessionsCotnroller UsersController
(Login/Logout) (Sign Up)

Model
app/models/user.rb
class User < ActiveRecord::Base
validates_presence_of :email, :password
validates_confirmation_of :password

has_many :messages
has_many :replies
end

Migration
db/migrate/yyyyMMddhhmmss_create_users.rb

class CreateUsers < ActiveRecord::Migration
def self.up
create_table :users do |t|
t.string :email
t.string :name
t.string :password

t.timestamps
end
end

def self.down
drop_table :users
end
end

Sign Up
app/controllers/users_controller.rb
class UsersController < ApplicationController
def new # show the sign up page
end

def create # register a new user
end
end

Login/Logout
app/controllers/sessions_controller.rb
class SessionsController < ApplicationController
def destroy # logout
end

def create # login
end
end

A little about RESTful
create v.s. register/login
destroy v.s. logout

? Controller Resource

? Resource operations:
? Create, Read, Update, Delete
? Only 7 actions:
? index, new, create (C), edit, update (U),
show (R), destroy (D)

Login Create a Session

Logout Destroy a Session

Sign Up Create a User

To be RESTFul, (controllers)

http://www.slideshare.net/shaokun/rest-ruby-on-rails

Migration
$ rails g migration add_user_id_to_messages_replies
$ rake db:migrate

class AddUserIdToMessagesReplies < ActiveRecord::Migration
def self.up
add_column :messages, :user_id, :integer
add_column :replies, :user_id, :integer
end

def self.down
remove_column :messages, :user_id
remove_column :replies, :user_id
end
end

validates_presence_of :email, :password
validates_confirmation_of :password,
:message => "should match confirmation"
end

<%= password_field "user", "password" %>
<%= password_field "user", "password_confirmation" %>

validates_exclusion_of :age,
:in => 30..60, :message => "This site is only for under 30 and over 60"
validates_format_of :email,
:with => /A([^@s]+)@((?:[-a-z0-9]+.)+[a-z]{2,})Z/i
end

? http://api.rubyonrails.org/

? validates_acceptance_of

? validates_con?rmation_of

? validates_exclusion_of

? validates_format_of

? validates_inclusion_of

? validates_length_of

? validates_numericality_of

? validates_presence_of

View
<%= form_for(@message) do |f| %>
...
<% end %>

<%= form_for(@message, :remote => true) do |f| %>
...
<% end %>

Controller

def create
respond_to do |format|
format.html { redirect_to(messages_url) }
format.js {
render :update do |page|
...
end
}
end
end

? $ rake db:test:clone_structure

? $ rake test

? $ ruby -Itest test/unit/user_test.rb

? $ ruby -Itest test/unit/user_test.rb -n TEST_CASE_METHOD_NAME

require 'test_helper'

class UsersControllerTest < ActionController::TestCase
test "should create a new user" do
assert_difference("User.count", +1) do
post :create, :user => {
:email => "shaokun.wu@gmail.com",
:password => "a"
}

assert_redirected_to root_path
end
end
end

require 'test_helper'

class UserTest < ActiveSupport::TestCase
test "should set the name through email" do
user = User.new(:email => "shaokun.wu@gmail.com", :password => "a")
assert user.save
assert_equal "shaokun.wu", user.name
end
end

? PHP/ASP Upload

? 200 /

? Sina App Engine

? Rails
? VPS: linode.com, AWS EC2

? $ gem install heroku

? $ heroku create roc-demo2

? $ heroku keys:add

? $ git remote add heroku git@heroku.com:roc-demo2.git

? $ git push heroku master

? $ heroku rake db:migrate

C:Sitesroc-demo2>git push heroku master
Counting objects: 313, done.
Compressing objects: 100% (185/185), done.
Writing objects: 100% (313/313), 7.74 MiB | 15 KiB/s, done.
Total 313 (delta 123), reused 232 (delta 94)

-----> Heroku receiving push
-----> Rails app detected
-----> Detected Rails is not set to serve static_assets
Installing rails3_serve_static_assets... done
-----> Configure Rails 3 to disable x-sendfile
Installing rails3_disable_x_sendfile... done
-----> Configure Rails to log to stdout
Installing rails_log_stdout... done
-----> Gemfile detected, running Bundler version 1.0.7
Unresolved dependencies detected; Installing...
Using --without development:test
Fetching source index for http://rubygems.org/
Installing rake (0.8.7)
...
Your bundle is complete! It was installed into ./.bundle/gems/
-----> Compiled slug size is 3.7MB
-----> Launching... done, v4
http://roc-demo2.heroku.com deployed to Heroku

To git@heroku.com:roc-demo2.git
* [new branch] master -> master

? Get the code:
http://github.com/kudelabs/roc-demo2

? See it in action:
http://demo2.railsoncampus.com

? keep in touch:
@railsoncampus
http://weibo.com/1944841390

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