subtitulo para las secciones

app/models/post/template_field.rb

@@ -22,6 +22,10 @@ class Post
       contents.dig('title') if complex?
     end
 
+    def subtitle
+      contents.dig('subtitle') if complex?
+    end
+
     # Obtiene el valor
     def value
       complex? ? contents.dig('value') : contents

app/views/posts/_form.haml

@@ -119,6 +119,8 @@
     - next unless type = template.type
     - if template.title.present?
       %h1{id: template.title.tr(' ', '_').titleize}= template.title
+    - if template.subtitle.present?
+      %p= template.subtitle
     - value = @post.new? ? template.values : @post.get_front_matter(template.key)
     .form-group
       = label_tag "post_#{template}", id: template do