##Creamos la aplicación my-blog con base de datos en Posgresql

rails new my-blog -d=postgresql
cd my-blog
git init
git add .
git commit -m "rails new my-blog postgresql"
bundle
rake db:create
rake db:migrate
git add .
git commit -m "postgresql configuration"

para ingresar al aconsola de Postgresql

psql my-blog_development postgres

creando scaffold de Post

rails g scaffold post title:string content:text
rake db:migrate
git add .
git commit -m "adding post to the blog"

Generamos el modelo de comment

rails g model comment comment:text post:references
rake db:migrate
git add .
git commit -m "adding comments models"

Generamos controller de Comment

rails g controller comments create
git add .
git commit -m "we can create comment for the post"
git add .
git commit -m "show comments of the post"
git add .
git commit -m "count comments"
git add .
git commit -m "cascade delete post and comments"

Nos concetamos a GitHub

git remote add origin git@github.com:almapase/MyBlog.git
git push origin master

Instalar Devise

creamos una rama nueva para esto

git checkout -b devise
bundle
rails generate devise:install
rails g devise:views
git add .
git commit -m "devise installed an generated"
rails generate devise User
rake db:migrate
git add .
git commit -m "created model and user view to devise"
git add .
git commit -m "navbar  sign in, out and up"

###crear una migración: agrega campo name al modelo User

rails g migration addNameToUser name:string
rake db:migrate

###En el modelo user validamos que el usuario sea requerido:

validates :name, presence: true

en el registrations/new.html.erb:

<div class="field">
  <%= f.label :name %><br />
  <%= f.text_field :name, autofocus: true %>
</div>

en /my-blog/app/controllers/application_controller.rb agregamos los Strong parameters para Devise:

before_action :configure_permitted_parameters, if: :devise_controller?

protected
def configure_permitted_parameters
  devise_parameter_sanitizer.for(:sign_up) << :name
  devise_parameter_sanitizer.for(:account_update) << :name
end

Para saludar al usuario agregamos en my-blog/app/views/layouts/_navbar.html.erb:

<span>Hola  <%= current_user.name %></span>

git add .
git commit -m "Create name for the model user"

###Relacionando los post y comentarios con los usuarios creamos migración con referencia:

rails g migration addUserIdToPost user:references
rails g migration addUserIdToComment user:references
rake db:migrate

Al borrar los usuarios los post y comment se borrarán en cascada en /my-blog/app/models/user.rb

has_many :posts, :dependent => :destroy
has_many :comments, :dependent => :destroy

referencias en Post y comments en /my-blog/app/models/post.rb:

belongs_to :user

en /my-blog/app/models/comment.rb

belongs_to :user

git add .
git commit -m "add user to comment and  post"

###Agregando Moderadores