obtener el valor correo para value_was

app/models/metadata_document_date.rb

@@ -7,10 +7,14 @@ class MetadataDocumentDate < MetadataTemplate
     Date.today.to_time
   end
 
+  def value_from_document
+    document.date
+  end
+
   # El valor puede ser un Date, Time o una String en el formato
   # "yyyy-mm-dd"
   def value
-    return (self[:value] = document.date || default_value) if self[:value].nil?
+    return (self[:value] = value_from_document || default_value) if self[:value].nil?
 
     self[:value] = Date.iso8601(self[:value]).to_time if self[:value].is_a? String
 

app/models/metadata_lang.rb

@@ -6,8 +6,12 @@ class MetadataLang < MetadataTemplate
     super || I18n.locale
   end
 
+  def value_from_document
+    document.collection.label
+  end
+
   def value
-    self[:value] ||= document.collection.label || default_value
+    self[:value] ||= value_from_document || default_value
   end
 
   def values

app/models/metadata_path.rb

@@ -7,8 +7,12 @@ class MetadataPath < MetadataTemplate
     File.join(site.path, "_#{lang}", "#{date}-#{slug}#{ext}")
   end
 
+  # El valor no vuelve desde el documento
+  def value_from_document
+    document.path
+  end
+
   def value
-    @value_was ||= default_value
     self[:value] = default_value
   end
   alias absolute value