ordenar!

app/controllers/posts_controller.rb

@@ -9,8 +9,10 @@ class PostsController < ApplicationController
     authorize Post
     @site = find_site
     @category = session[:category] = params.dig(:category)
+    @layout = params.dig(:layout).try :to_sym
     # TODO: Aplicar policy_scope
     @posts = @site.posts(lang: I18n.locale)
+    @posts.sort_by! :order, :date
   end
 
   def show

app/models/metadata_date.rb

@@ -1,4 +1,7 @@
 # frozen_string_literal: true
 
 class MetadataDate < MetadataTemplate
+  def default_value
+    Date.today
+  end
 end

app/models/post_relation.rb

@@ -31,6 +31,22 @@ class PostRelation < Array
     post
   end
 
+  alias sort_by_generic! sort_by!
+
+  # Permite ordenar los artículos por sus atributos
+  #
+  # XXX: Prestar atención cuando estamos mezclando artículos con
+  # diferentes tipos de atributos.
+  def sort_by!(*attrs)
+    sort_by_generic! do |post|
+      attrs.map do |attr|
+        return 0 unless post.attributes.include? attr
+
+        post.public_send(attr).value
+      end
+    end
+  end
+
   alias find_generic find
 
   # Encontra un post por su id convertido a SHA1

app/views/posts/index.haml

@@ -37,6 +37,8 @@
                   - if @category
                     - next unless post.attributes.include? :categories
                     - next unless post.categories.value.include?(@category)
+                  - if @layout
+                    - next unless post.layout.name == @layout
                   - next unless policy(post).show?
                   %tr
                     %td
@@ -45,6 +47,10 @@
                       = hidden_field 'post[reorder]', post.sha1,
                         value: i, class: 'reorder'
                     %td
+                      %small
+                        = link_to post.layout.name.to_s.humanize,
+                          site_posts_path(@site, layout: post.layout.name)
+                      %br/
                       = link_to post.title.value,
                         site_post_path(@site, post.id)
                       - if post.attributes.include? :draft
@@ -58,7 +64,10 @@
                             - post.categories.value.each do |c|
                               = link_to c, site_posts_path(@site, category: c)
 
-                    %td= post.date.value.strftime('%F')
+                    %td
+                      = post.date.value.strftime('%F')
+                      %br/
+                      = post.try(:order).try(:value)
                     %td
                       - if policy(post).edit?
                         = link_to t('posts.edit'),