• We will create use of clearance for user authentication and Froala-WYSIWYG to provide a rich editor that will enable us to style our contents.

Rails Application Setup

        rails new froala-blog -T 

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• The -T flag tells Rails to create a new application without the default test suite.
• Open your Gemfile and add the following gems.

#Gemfile
...
gem 'clearance'
gem 'bootstrap-sass'

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• Clearance is a simple authentication tool built for Rails.
• You will be using it for authentication on the blog you will be building.
• The other gem - bootstrap-sass will enable you to style your application using Bootstrap.
• Now install the gem by running bundle install from your terminal.
• Using your text editor, rename assets/stylesheets/application.css to assets/stylesheets/application.scss.
• Then apphend the line below:

#assets/stylesheets/application.scss
...
@import 'bootstrap-sprockets'
@import 'bootstrap';

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• Once that is done, you need to run the generator for clearance. Run the command below from your terminal.

rails generate clearance:install

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• It will generate the following output on your terminal:

create  config/initializers/clearance.rb
      insert  app/controllers/application_controller.rb
      create  app/models/user.rb
      create  db/migrate/20161231132513_create_users.rb

*******************************************************************************
Next steps:
1. Configure the mailer to create full URLs in emails:
    # config/environments/{development,test}.rb
    config.action_mailer.default_url_options = { host: 'localhost:3000' }
    In production it should be your app's domain name.
2. Display user session and flashes. For example, in your application layout:
    <% if signed_in? %>
      Signed in as: <%= current_user.email %>
      <%= button_to 'Sign out', sign_out_path, method: :delete %>
    <% else %>
      <%= link_to 'Sign in', sign_in_path %>
    <% end %>
    <div id="flash">
      <% flash.each do |key, value| %>
        <div class="flash <%= key %>"><%= value %></div>
      <% end %>
    </div>
3. Migrate:
    rake db:migrate
******************************************

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• Clearance does a lot of heavy lifting for us that we will not dive into in this tutorial.
• You can check out its Github repository to see all it has to offer.
• Let us implement the steps shown to us above.
• Using your text editor navigate to config/environments/development.rb, and add the line below;

#config/environments/development.rb
...
  config.action_mailer.default_url_options = { host: 'localhost:3000' }
...

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• Add it just above the end delimiter.
• Create a new file called _navigation.html.erb in your views/layouts directory.
• You will use this for our navigation.
• Paste the code below into the newly created file:

#views/layouts/_navigation.html.erb
<nav class="navbar navbar-default">
  <div class="container-fluid">
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar-collapse" aria-expanded="false">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">Froala-Blog</a>
    </div>
    <div class="collapse navbar-collapse" id="navbar-collapse">
    	<ul class="nav navbar-nav navbar-right">
          <li><%= link_to 'Home', root_path %></li>
                <% if signed_in? %>
                <li><%= link_to 'New Article', new_article_path %></li>
                <li>Signed in as: <%= current_user.email %></li>
                <li><%= link_to 'Sign out', sign_out_path, method: :delete %></li>
              <% else %>
                <li><%= link_to 'Sign in', sign_in_path %></li>
              <% end %>
    	</ul>
    </div>
  </div>
</nav>

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• Navigate to views/layouts/application.html.erb and make yours look like this:

#views/layouts/application.html.erb
<!DOCTYPE html>
<html>
  <head>
    <title>FroalaBlog</title>
    <%= csrf_meta_tags %>
    <%= stylesheet_link_tag    'application', media: 'all', 'data-turbolinks-track': 'reload' %>
    <%= javascript_include_tag 'application', 'data-turbolinks-track': 'reload' %>
  </head>
 <body>
    <%= render "layouts/navigation" %>
    <div id="flash">
      <% flash.each do |key, value| %>
        <div class="flash <%= key %>"><%= value %></div>
      <% end %>
    </div>
    <div class="container-fluid">
      <%= yield %>
    </div>
  </body>
</html>

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Installing Froala

• Open up your Gemfile and add the following gems:

#Gemfile
...
gem 'simple_form'
gem 'wysiwyg-rails'

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• The first is a gem that allows us to easily make forms in Rails. The next is the gem for Froala-WYSIWYG.
• Run bundle install.
• You need to import some assets into your application.
• Add the code below to your app/assets/stylesheets/application.scss, just above the *= require_tree . line.

#app/assets/stylesheets/application.scss
...
*= require froala_editor.min.css
 *= require froala_style.min.css
 *= require font-awesome
 ...

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• For your app/assets/javascripts/application.js, add the code:

#app/assets/javascripts/application.js
...
//= require froala_editor.min.js
...

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• Now you have Froala-WYSIWYG all set up

Creating Articles Controller and Model.

• Open your terminal and run the command to generate your ArticlesController.

rails generate controller Articles

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• · This will generate a bunch of files and directories for us.
• Navigate to app/controllers/articles_controller.rb and paste in the code below:

#app/controllers/articles_controller.rb
class ArticlesController < ApplicationController
  before_action :find_article, only: [:edit, :update, :show, :delete]
  before_action :require_login, except: [:index, :show]
  def index
    @articles = Article.all
  end
  # New action for creating article
  def new
    @article = Article.new
  end
  # Create action saves the article into database
  def create
    @article = Article.new(article_params)
    if @article.save
      flash[:notice] = "Successfully created article!"
      redirect_to article_path(@article)
    else
      flash[:alert] = "Error creating new article!"
      render :new
    end
  end
  # Edit action retrives the article and renders the edit page
  def edit
  end
  # Update action updates the article with the new information
  def update
    if @article.update_attributes(article_params)
      flash[:notice] = "Successfully updated article!"
      redirect_to article_path(@article)
    else
      flash[:alert] = "Error updating article!"
      render :edit
    end
  end
  # The show action renders the individual article after retrieving the id
  def show
  end
  # The destroy action removes the article permanently from the database
  def destroy
    if @article.destroy
      flash[:notice] = "Successfully deleted article!"
      redirect_to articles_path
    else
      flash[:alert] = "Error updating article!"
    end
  end
  private
  def article_params
    params.require(:article).permit(:title, :body)
  end
  def find_article
    @article = Article.find(params[:id])
  end
end

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• In the code above, we have all the actions needed to create an article.
• The line:

before_action :require_login, except: [:index, :show]

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• Restricts unauthorized users from editing, deleting, or creating a new article.
• Let us set up our views, create the needed files by running these commands:

touch app/views/articles/_form.html.erb
touch app/views/articles/index.html.erb
touch app/views/articles/show.html.erb
touch app/views/articles/new.html.erb
touch app/views/articles/edit.html.erb

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• Paste the code below into the respective files.
• The code for our form:

#app/views/articles/_form.html.erb
<%= simple_form_for (@article) do |f| %>
  <% if @article.errors.any? %>
    <div id="error_explanation">
      <h2>
        <%= "#{pluralize(@article.errors.count, "error")} prohibited this post from being saved:" %>
      </h2>
      <ul>
        <% @article.errors.full_messages.each do |msg| %>
          <li>
            <%= msg %>
          </li>
          <% end %>
      </ul>
    </div>
  <% end %>
  <div class="form-group">
    <%= f.input :title, class: "form-control" %>
  </div>
  <div class="form-group">
    <%= f.label :body %>
    <%= f.text_area :body, id: "wysiwyg" %>
  </div>
  <div class="form-group">
    <%= f.button :submit %>
  </div>
<% end %>
<!-- script for FROALA-WYSIWYG -->
<script>
  $('#wysiwyg').froalaEditor({
    inlineMode: false,
    heightMin: '200px',
    toolbarButtons: ['bold', 'italic', 'underline'],
  })
</script>

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• The main things that stand out in the code above are:

    id: "wysiwyg"

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<script>
  $('#wysiwyg').froalaEditor({
    inlineMode: false,
    heightMin: '200px',
    toolbarButtons: ['bold', 'italic', 'underline'],
  })
</script>

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• These two are very important for Froala-WYSIWYG to work. Let's make progress.

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Edit Page

learn ruby on rails tutorial - ruby on rails edit page - ruby on rails

#app/views/articles/edit.html.erb
<h2>Edit Article</h2>
<!-- Renders the form located at app/views/articles/_form.html.erb -->
<%= render "articles/form" %>

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Index Page

#app/views/articles/index.html.erb

<div class="container">
  <div class="col-sm-10 col-sm-offset-1 col-xs-12">
    <% @articles.each do |article| %>
    <div class="col-xs-12 text-center">
      <div class="text-center">
        <h2><%= article.title %></h2>
        <h6><%= article.created_at.strftime('%b %d, %Y') %></h6>
      </div>
      <div>
        <%= raw(article.body).truncate(358) %>
      </div>
      <div class="text-center">
        <%= link_to "READ MORE", article_path(article) %>
      </div>
      <!-- This block is available to only signed in users -->
      <% if signed_in? %>
        <%= link_to "Show", article_path(article), class: "btn btn-primary" %>
        <%= link_to "Edit", edit_article_path(article), class: "btn btn-default" %>
        <%= link_to "Delete", article_path(article), class: "btn btn-danger", data: {:confirm => "Are you sure?"}, method: :delete %>
      <% end %>
      <hr />
    </div>
    <% end %>
  </div>
</div>

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New Article Page

#app/views/articles/new.html.erb
<h2>Create New Article</h2>
<!-- Renders the form located at app/views/articles/_form.html.erb -->
<%= render "articles/form" %>

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Show Page

#app/views/articles/show.html.erb
<div class="col-sm-11 col-xs-12">
  <h2 class="text-center"><%= @article.title %></h2>
  <h5 class="text-center"><%= @article.created_at.strftime('%b %d, %Y') %></h5>
  <div class="fr-view"><%= raw @article.body %></div>
</div>

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• In the code for the show page, you will see that the body of the articles is rendered in a div whose class is fr-view. Froala-WYSIWYG requires this to be like so if you want the styles to be shown on the page.
• With all these done, let us set up our routes. Here is what your routes should look like:

#config/routes.rb
Rails.application.routes.draw do
  # For details on the DSL available within this file, see 
  root to: "articles#index"
  resources :articles
end

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• Finally, you need to generate your Article model. Run the command to do so.

rails generate model Article title:string body:text

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• Next migrate your database.

rake db:migrate

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• You can now view your new blog. Start up your server rails server, point your browser to http://localhost:3000 to see what you have.

• You can now view your new blog. Start up your server rails server, point your browser to http://localhost:3000 to see what you have.

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