clean arch examples

code.rb

#############################################
# Example 1
BookRepository.new.where(author_id: 23).order(:published_at).limit(8)




#############################################
# Example 2

book.to_json
book.to_xml

#############################################
# Example 3
<ul>
  <% User.find(order: 'last_name').each do |user| -%>
    <li><%= user.last_name %> <%= user.first_name %></li>
  <% end %>
</ul>


#############################################
# Example 4

class Book < ActiveRecord
  def to_param
    "#{book.id}-#{slug}"
  end
end

<%= link_to book.title, book %>


#############################################
# Example 5

Class User < ActiveRecord
  def full_name
    “#{first_name} #{last_name}”
  end
end


Name: <%= @user.full_name %>





#############################################
# Example 6

# POST /comments
def create
  @post = Post.find params[:post_id]
  @user = User.find_or_initialize_by user_params
  @user.password = SecureRandom.hex if @user.new_record?
  @comment = @post.comments.new(comment_params.merge(user: @user))

  flag_spammer

  if !verify_recaptcha
    redirect_to smart_post_path(@post), error: t('security.robot_atack')
  elsif cooldown_spammer?(@user)
    redirect_to smart_post_path(@post), error: t('security.spammer_atack')
  else

    if @user.save && @comment.save
      ga_event category: :comments, action: :create, label: @post.title, interaction: 1, value: 1

      EventTracker.notify 'comments', 'create', <<-MSG
      #{@user.name}:
      #{@comment.comment}
      #{@post.title} #{(begin
                          comment_url(@comment)
                        rescue
                          :cant_get_comment_url
                        end)}
      MSG

      begin
        sign_in @user
        remember_me @user
      rescue
        nil
      end

      @user.follow(@post) if params[:subscribe] == '1'

      notify_post_subscribers

      redirect_to comment_path(@comment), notice: t('comments.thank_you')
    else
      redirect_to smart_post_path(@post)
    end
  end
end