application.html.slim

doctype html
html
  head
    meta name="viewport" content="width=device-width, initial-scale=1.0"
    title Paporeto
    = stylesheet_link_tag    "application", media: "all", "data-turbolinks-track" => true
    = csrf_meta_tags
 
    /[if lt IE 9]
      = javascript_include_tag "html5shiv", "data-turbolinks-track" => true
      = javascript_include_tag "respond.min", "data-turbolinks-track" => true
  body
 
    .navbar.navbar-inverse.navbar-fixed-top
      .container
        .navbar-header
           = link_to 'Paporeto', root_path, class: 'navbar-brand'
        .navbar-collapse
          ul.nav.navbar-nav
            li class="#{nav_status('articles')}" = link_to 'Artigos', articles_path
            li class="#{nav_status('categories')}" = link_to 'Categorias', categories_path
 
    .container
      .pull-right = today
      h3 = maybe_friday
 
      = yield
    = javascript_include_tag "application", "data-turbolinks-track" => true

articles_controller.rb

class ArticlesController < ApplicationController
  before_action :set_article, only: [:show, :edit, :update, :destroy]
 
  # GET /articles
  def index
    @articles = Article.order(published_at: :desc).order(:title)
  end
 
  # GET /articles/1
  def show
  end
 
  # GET /articles/new
  def new
    @article = Article.new
  end
 
  # GET /articles/1/edit
  def edit
  end
 
  # POST /articles
  def create
    @article = Article.new(article_params)
    
    if @article.save
      redirect_to @article, notice: 'Artigo salvo.'
    else
      render action: 'new'
    end
  end
 
  # PATCH/PUT /articles/1
  def update
    if @article.update(article_params)
      redirect_to @article, notice: 'Artigo salvo.'
    else
      render action: 'edit'
    end
  end
 
  # DELETE /articles/1
  def destroy
    @article.destroy
    redirect_to articles_url, notice: 'Artigo excluído.'
  end
 
  private
    # Use callbacks to share common setup or constraints between actions.
    def set_article
      @article = Article.find(params[:id])
    end
 
    # Only allow a trusted parameter "white list" through.
    def article_params
      params.require(:article).permit(:title, :body, :published_at, :category_id)
    end
end

categories_controller.rb

class CategoriesController < ApplicationController
  before_action :set_category, only: [:edit, :update, :destroy]
 
  # GET /categories
  def index
    @categories = Category.all
  end
 
  # GET /categories/new
  def new
    @category = Category.new
  end
 
  # GET /categories/1/edit
  def edit
  end
 
  # POST /categories
  def create
    @category = Category.new(category_params)
 
    if @category.save
      redirect_to categories_url
    else
      render action: 'new'
    end
  end
 
  # PATCH/PUT /categories/1
  def update
    if @category.update(category_params)
      redirect_to categories_url
    else
      render action: 'edit'
    end
  end
 
  # DELETE /categories/1
  def destroy
    @category.destroy
    redirect_to categories_url, notice: 'Category was successfully destroyed.'
  end
 
  private
    # Use callbacks to share common setup or constraints between actions.
    def set_category
      @category = Category.find(params[:id])
    end
 
    # Only allow a trusted parameter "white list" through.
    def category_params
      params.require(:category).permit(:name)
    end
end

routes.rb

Paporeto::Application.routes.draw do
  resources :categories, except: :show
 
  resources :articles
 
  root 'articles#index'
 
  # The priority is based upon order of creation: first created -> highest priority.
  # See how all your routes lay out with "rake routes".
 
  # You can have the root of your site routed with "root"
  # root 'welcome#index'
 
  # Example of regular route:
  #   get 'products/:id' => 'catalog#view'
 
  # Example of named route that can be invoked with purchase_url(id: product.id)
  #   get 'products/:id/purchase' => 'catalog#purchase', as: :purchase
 
  # Example resource route (maps HTTP verbs to controller actions automatically):
  #   resources :products
 
  # Example resource route with options:
  #   resources :products do
  #     member do
  #       get 'short'
  #       post 'toggle'
  #     end
  #
  #     collection do
  #       get 'sold'
  #     end
  #   end
 
  # Example resource route with sub-resources:
  #   resources :products do
  #     resources :comments, :sales
  #     resource :seller
  #   end
 
  # Example resource route with more complex sub-resources:
  #   resources :products do
  #     resources :comments
  #     resources :sales do
  #       get 'recent', on: :collection
  #     end
  #   end
  
  # Example resource route with concerns:
  #   concern :toggleable do
  #     post 'toggle'
  #   end
  #   resources :posts, concerns: :toggleable
  #   resources :photos, concerns: :toggleable
 
  # Example resource route within a namespace:
  #   namespace :admin do
  #     # Directs /admin/products/* to Admin::ProductsController
  #     # (app/controllers/admin/products_controller.rb)
  #     resources :products
  #   end
end

show.html.slim

- if notice
  .alert.alert-info.alert-dismissable
    button type="button" class="close" data-dismiss="alert" aria-hidden="true" × 
    = notice
 
h1 
  = @article.title
  .pull-right
    = link_to 'Editar', edit_article_path(@article), class: 'btn btn-default'
 
hr
 
strong = @article.category.name
p = l @article.published_at
= simple_format @article.body