la opción required tiene más prioridad que la definición closes #217

app/helpers/application_helper.rb

@@ -73,7 +73,7 @@ module ApplicationHelper
 
   # Opciones por defecto para el campo de un formulario
   def field_options(attribute, metadata, **extra)
-    required = metadata.required || extra[:required]
+    required = extra.key?(:required) ? extra[:required] : metadata.required
 
     {
       class: "form-control #{invalid(metadata.post, attribute)} #{extra[:class]}",

app/views/posts/attributes/_image.haml

@@ -32,7 +32,7 @@
   = text_field(*field_name_for(base, attribute, :description),
     value: metadata.value['description'],
     dir: dir, lang: locale,
-    **field_options(attribute, metadata))
+    **field_options(attribute, metadata, required: false))
   = render 'posts/attribute_feedback',
     post: post, attribute: [attribute, :description], metadata: metadata