guardar y mostrar el html guardado

app/models/metadata_template.rb

@@ -7,7 +7,6 @@
 MetadataTemplate = Struct.new(:site, :document, :name, :label, :type,
                               :value, :help, :required, :errors, :post,
                               :layout, keyword_init: true) do
-  include ActionText::ContentHelper
 
   attr_reader :value_was
 
@@ -124,6 +123,18 @@ MetadataTemplate = Struct.new(:site, :document, :name, :label, :type,
                        tags: allowed_tags,
                        attributes: allowed_attributes,
                        scrubber: scrubber).strip.html_safe
+  en,
+
+  def sanitizer
+    @sanitizer ||= Rails::Html::Sanitizer.safe_list_sanitizer.new
+  end
+
+  def allowed_attributes
+    @allowed_attributes ||= %w[style src alt controls data-align]
+  end
+
+  def allowed_tags
+    @allowed_tags ||= %w[strong em del u mark p h1 h2 h3 h4 h5 h6 ul ol li img iframe audio video div]
   end
 
   # Decifra el valor

app/views/posts/attributes/_content.haml

@@ -4,7 +4,7 @@
     post: post, attribute: attribute, metadata: metadata
 
   .editor
-    = text_area_tag "post[#{attribute}]", metadata.value,
+    = text_area_tag "post[#{attribute}]", '',
       dir: dir, lang: locale,
       **field_options(attribute, metadata), class: 'd-none'
 
@@ -70,3 +70,4 @@
           %input.form-control{ type: 'url', data: { prop: 'link-href' } }/
 
     .editor-content.form-control.h-auto{ contenteditable: 'true' }
+      = metadata.value