RubyWeekend Application Tutorial:
  Lines beginning with a $ are commands to be run from the command line
  indented text indicates text to be inserted into some file.


********CREATE A NEW RAILS APP*********
$ rails new todo_app

$ cd todo_app


********START THE SERVER********
$ rails server

You should see the "Rails Start Page"

stop the server "ctrl-c"


********CREATE A HOMEPAGE & GET RID OF RAILS START PAGE********
$ rails g controller welcome index

$ rm public/index.html

config/routes.rb

  uncomment line #53 "root :to => 'welcome#index'"

$ rails s

http://localhost:3000
stop the server "ctrl-c"


********CREATE SOME TODO'S********
$ rails g scaffold todo title:string description:text
$ bundle exec rake db:migrate

$ rails s

http://localhost:3000/todos/


********VALIDATION********

app/models/todo.rb

  attr_accessible :title, :description

  validates_presence_of :title


stop the server "ctrl-c"


********PRETTY TODO's USING TWITTER BOOTSTRAP********

Gemfile
  gem 'twitter-bootstrap-rails'

$ bundle install
$ rails g bootstrap:install
$ rails g bootstrap:layout application fixed

Overwrite ?
  Y

$ rails g bootstrap:themed todos

Overwrite ?
  Y to all

CHANGE "LINK 1" TO OPEN
app/layouts/application.html.erb
  <li><%= link_to "Open", todos_path  %></li>

  Change
  <a class="brand" href="#">TodoApp</a>
  to
  <a class="brand" href=<%= root_path %>>RwTodoApp</a>

Remove Scaffod Stylesheet
$ rm app/assets/stylesheets/scaffolds.css.scss

$ rails s

http://localhost:3000

stop the server "ctrl-c"


********ADDING PRIORITY TO TODOS********
$ rails g migration add_priority_to_todos priority:integer
$ bundle exec rake db:migrate

Add priority to form
views/todos/_form.html.erb
  <div class="control-group">
    <%= f.label :priority, :class => 'control-label' %>
    <div class="controls">
      <%= f.text_field :priority, :class => 'text_field' %>
    </div>
  </div>

views/todos/index.html.erb
  remove from <th> id, created_at
  change one th & td to priority
  make title link_to show action

views/todos/show.html.erb
  <p>
    <strong><%= model_class.human_attribute_name(:priority) %>:</strong><%= @todo.priority %>
  </p>

model/todo.rb
  default_scope order("priority DESC")
  attr_accessible :title, :description, :priority

$ rails s

http://localhost:3000/todos


********ADD A TODO********

stop the server "ctrl-c"


********ADDING NOTES TO TODO'S********
$ rails g model note note:text todo_id:integer
$ bundle exec rake db:migrate

$ rails s
http://localhost:3000/todos


********ACTIVE RECORD ASSOCIATIONS********
model/todo.rb
  has_many :notes

model/note.rb
  belongs_to :todo


********SHOW TODO NOTES ON TODO PAGE********
  controllers/todos_controller
    show
      @notes = @todo.notes.all # on line 17

views/todos/show.html.erb
  <h3>Notes</h3>
  <ul>
    <% @notes.each do |note| %>
      <li><%= note.note %> <em><%= note.created_at %><em></li>
    <% end %>
  </ul>

stop the server "ctrl-c"


********ADD SOME NOTES IN THE CONSOLE********
$ rails console

> n = Note.create(note: "It's a note", todo_id: 1)

View the page and the note should be there
> exit
$ rails s
http://localhost:3000/todos

stop the server "ctrl-c"
$ rails console
> t = Todo.find(1)
> x = t.notes.build(note: "note made by build")
> x.save

View the page again and the second note will be there
> exit
$ rails s
http://localhost:3000/todos


CREATE NOTE FROM TODO SHOW PAGE
1. Create a notes_controller
2. add routing for the controller
3. add a notes form on the show page


********NOTES CONTROLLER********
$ rails g controller notes create

controllers/notes_controller
  def create
    @todo = Todo.find(params[:todo_id])
    @note = @todo.notes.build(params[:note])

    if @note.save
      redirect_to todo_path(@todo)
    else
      redirect_to todo_path(@todo)
    end
  end


********ROUTING TO THE CONTROLLER********
config/routes.rb
  resources :todos do
    resources :notes
  end


********FORM ON TODO SHOW PAGE********
views/todos/show.html.erb
  <%= form_for([@todo, @todo.notes.build]) do |f| %>
    <%= f.label :note %>
    <%= f.text_field :note %>
    
    <%= f.submit %>
  <% end %>

$ rails s
http://localhost:3000/todos/1

reload the page & the form should be there


********VALIDATE PRESENCE OF NOTE********
  attr_accessible :note
  validates_presence_of :note


********STAMP FOR SHOWING DATES********
stop the server "ctrl-c"
Gemfile
  gem 'stamp'

$ bundle

views/todos/show.html.erb
  <em><%= note.created_at.stamp("July 4, 1776") %><em>


********STATUS********
$ rails g migration add_status_to_todos status:boolean

db/migrate/#####_add_status_to_todos
  add_column :todos, :status, :boolean, :default => true

$ bundle exec rake db:migrate

views/todos/_form.html.erb
    <div class="control-group">
      <%= f.label :status, :class => 'control-label' %>
      <div class="controls">
        <%= radio_button("todo", "status", "true") %> Open<br>
        <%= radio_button("todo", "status", "false") %> Closed
      </div>
    </div>

models/todo.rb
  attr_accessible :status

views/todos/show.html.erb
  <p>
    <strong><%= model_class.human_attribute_name(:status) %>:</strong><br>
    <% if @todo.status == true %>
      Open
    <% else %>
      Completed
    <% end %>
  </p>

controllers/todos_controller.rb
  def completed
    @todos = Todo.find_all_by_status(false)
    render :index
  end  

config/routes.rb
  match '/completed' => 'todos#completed', :as => :completed

views/todos/index.html.erb
  <th><%= model_class.human_attribute_name(:status) %></th>

  <td>
    <% if todo.status == true %>
      Open
    <% else %>
      Completed
    <% end %>
  </td>

CHANGE "LINK 2" TO COMPLETE
  app/layouts/application.html.erb
    <li><%= link_to "Complete", completed_path  %></li>

$ rails s
http://localhost:3000/


********ADVANCED BUT STARTING EASY********

CREATE STATIC PAGE. "about page"

config/routes.rb
  match '/about' => 'welcome#about', :as => :our_cool_about_page

app/controllers/welcome_controller.rb
  def about
  end
  
app/views/welcome/about.html.erb
  put whatever you want in here. It's you app!

CHANGE "LINK 3" TO ABOUT
  app/views/layouts/application.html.erb
    <li><%= link_to "About", our_cool_about_page_path %></li>

ADDING AN IMAGE
  get an image from the interwebs
  Place your image in "app/assets/images/"
  
  app/views/welcome/index.html.erb
    <div><%= image_tag('the-name-of-your-image.jpg') %></div>
    

GETTY FANCY WITH USER ACCOUNTS
stop the server "ctrl-c"  
  
Gemfile
  gem 'devise' # https://github.com/plataformatec/devise
  
$ bundle

$ rails g devise:install
  # There will be some configuration here
  
app/config/environments/development.rb
  config.action_mailer.default_url_options = { :host => 'localhost:3000' }

app/views/layouts/application.html.erb
  <p class="notice"><%= notice %></p>
  <p class="alert"><%= alert %></p>

app/config/application.rb
  config.assets.initialize_on_precompile = false

app/config/environments/production.rb
  config.action_mailer.default_url_options = { :host => 'http://mywebsite.com' }
  
$ rails g devise User

$ bundle exec rake db:migrate

$ rails g devise:views

$ rails s
http://localhost:3000/

app/controllers/todos_controller.rb
  before_filter :authenticate_user!

http://localhost:3000/todos

ADD SIGN IN AND SIGN UP LINKS

inside the sidebar area, replace Link1 & Link2. Delete Link3
app/views/layouts/application.rb
  <li><%= link_to "Sign Up", new_user_registration_path  %></li>
  <li><%= link_to "Sign In", new_user_session_path  %></li>

SIGN UP FOR AN ACCOUNT!
  how do you log out?
  
UPDATE SIDEBAR
app/views/layouts/application.rb
  <% if user_signed_in? %>
    <li><%= link_to "Update Account", edit_registration_path(current_user) %></li>
    <li><%= link_to "Sign Out", destroy_user_session_path, :method => :delete %></li>
  <% else%>
    <li><%= link_to "Sign Up", new_user_registration_path  %></li>
    <li><%= link_to "Sign In", new_user_session_path  %></li>
  <% end %>
  
REFRESH PAGE!
  sign out then sign back in.
  
FIXING A BUG
  
app/helpers/application_helper.rb
  def display_flash_message
    [:notice, :success, :alert, :warning, :error].each do |message|
      return content_tag(:div, flash[message], :class => message) if flash[message]
    end unless flash.empty?
  end

app/controllers/todos_controller.rb
  def create
    ...
    else
      format.html { 
        flash[:alert] = 'Something went wrong trying to save the TODO'
        render action: "new"
        }
        ...
  end    
SIGN OUT & CREATE NEW ACCOUNT

http://localhost:3000/todos/

SCOPING TODOS
stop the server "ctrl-c"

app/models/user.rb
  has_many :todos

app/models/todo.rb
  belongs_to :user
  
$ rails g migration add_user_id_to_todos user_id:integer

$ bundle exec rake db:migrate

app/controllers/todos_controller.rb
  replace all `Todo.` with `current_user.todos.`
  NOTE: be sure the . is after the Todo if you "global find and replace". This ensures that the class name, and flash messages are untouched.
  
GETTING FANCY WITH HELPERS

app/helpers/application_helper.rb
  def avatar(email, options = {})
    require 'digest/md5'
    hash = Digest::MD5.hexdigest(email)
    image_src = url_for({:host => "www.gravatar.com/avatar/#{hash}", :d => 'mm'}.merge(options))
    image_tag(image_src, :alt => 'Gravatar Image')
  end
  
app/views/layouts/application.html.erb
  <div class="pull-right">
    <%= avatar(current_user.email) if user_signed_in? %>
  </div>
  <h3>Sidebar</h3>
  

MAKE AT LEAST 10 TODOS

TIME TO PAGINATE
stop the server "ctrl-c"

Gemfile
  gem 'kaminari' #https://github.com/amatsuda/kaminari

$ bundle

app/controller/todos_controller.rb
  def index
    from: @todos = current_user.todos.find_all_by_status(true)
    to: @todos = current_user.todos.where(:status => true).page(params[:page]).per(5)

  def completed
    from: @todos = current_user.todos.find_all_by_status(true)
    to: @todos = current_user.todos.where(:status => false).page(params[:page]).per(5)

app/views/todos/index.html.erb
  <%= paginate(@todos) %>


FIXING THE VIEWS
app/assets/application.css
  span.page.current {
    border-color: #DDDDDD;
    border-style: solid;
    border-width: 1px 1px 1px 0;
    float: left;
    line-height: 34px;
    padding: 0 14px;
    text-decoration: none;
  }

reload page and see the fixed views



READY TO DEPLOY!!
stop the server "ctrl-c"

Signup at https://api.heroku.com/signup

Gemfile
  group :development do
    gem 'sqlite3' # <-- move this into here
    gem 'heroku'
  end
  group :production do
    gem 'pg'
    gem 'thin'
  end
  
$ bundle
$ git init .
$ git add .
$ git commit -m "Initial Commit"
$ heroku create --stack cedar
   Enter in the credentials you signed up with.
   The url of the app will be given to you after the app has been created.
$ git push heroku master
$ heroku run rake db:migrate