Se agregó el archivo de posts por fecha.

app/controllers/posts_controller.rb

@@ -11,4 +11,8 @@ def show
     @comments = comments_collection.page(page).per(VenganzasDelPasado::Application.config.comments_per_page)
   end
 
+  def archive
+    @posts = @posts.published.created_on(params[:year],params[:month],params[:day]).lifo.page(params[:page]).per(VenganzasDelPasado::Application.config.posts_per_page)
+  end
+
 end

app/models/post.rb

@@ -10,4 +10,22 @@ class Post < ActiveRecord::Base
   scope :published, where(:status => 'published')
   scope :lifo, order('created_at DESC')
 
+
+  def self.created_on(year, month = nil, day = nil)
+    date = Date.new year.to_i
+
+    if month.present?
+      date = date.change( :month => month.to_i )
+      if day.present?
+        date = date.change( :day => day.to_i )
+        range_date = date.beginning_of_day..date.end_of_day
+      else
+        range_date = date.beginning_of_month..date.end_of_month
+      end
+    else
+      range_date = date.beginning_of_year..date.end_of_year
+    end
+
+    where(:created_at => range_date)
+  end
 end

app/views/posts/archive.html.haml

@@ -0,0 +1,18 @@
+- if params[:day].present?
+  - title_part = "Archivo del #{params[:day]}/#{params[:month]}/#{params[:year]}"
+- elsif params[:month].present?
+  - title_part = "Archivo del #{params[:month]}/#{params[:year]}"
+- else
+  - title_part = "Archivo del año #{params[:year]}"
+
+- if params[:page].nil?
+  - page_title(title_part)
+- else
+  - page_title("#{title_part} <small>Página #{params[:page]}</small>")
+
+%h2.fancy-title!= html_page_title
+
+.posts
+  = render @posts
+
+= paginate @posts, :window => 2

config/routes.rb

@@ -6,6 +6,9 @@
     get '/users/auth/:provider' => 'users/omniauth_callbacks#passthru', :as => :user_omniauth
   end
 
+  match 'posts/archive/:year(/:month(/:day))' => 'posts#archive', :constraints => {
+    :year => /\d{4}/, :month => /\d{2}/, :day => /\d{2}/
+  }
   resources :posts, :only => [:index, :show] do
     resources :comments, :only => [:show, :create] do
       member do