diff --git a/app/controllers/sites_controller.rb b/app/controllers/sites_controller.rb
index 20ce5bad..bdaa9011 100644
--- a/app/controllers/sites_controller.rb
+++ b/app/controllers/sites_controller.rb
@@ -107,7 +107,7 @@ class SitesController < ApplicationController
   def merge
     authorize site
 
-    if site.repository.merge(current_usuarie)
+    if SiteService.new(site: site, usuarie: current_usuarie).merge
       flash[:success] = I18n.t('sites.fetch.merge.success')
     else
       flash[:error] = I18n.t('sites.fetch.merge.error')
diff --git a/app/models/metadata_array.rb b/app/models/metadata_array.rb
index 9f5a84b6..0527ccb8 100644
--- a/app/models/metadata_array.rb
+++ b/app/models/metadata_array.rb
@@ -23,7 +23,15 @@ class MetadataArray < MetadataTemplate
     value.join(', ')
   end
 
-  alias indexable_values values
+  # Obtiene el valor desde el documento, convirtiéndolo a Array si no lo
+  # era ya, por retrocompabilidad.
+  #
+  # @return [Array]
+  def document_value
+    [super].flatten(1)
+  end
+
+  alias indexable_values value
 
   private
 
diff --git a/app/services/site_service.rb b/app/services/site_service.rb
index 4f3905a5..389549c3 100644
--- a/app/services/site_service.rb
+++ b/app/services/site_service.rb
@@ -61,6 +61,18 @@ SiteService = Struct.new(:site, :usuarie, :params, keyword_init: true) do
     commit_config(action: :tor)
   end
 
+  # Trae cambios desde la rama remota y reindexa los artículos.
+  #
+  # @return [Boolean]
+  def merge
+    result = site.repository.merge(usuarie)
+
+    # TODO: Implementar callbacks
+    site.try(:index_posts!) if result
+
+    result.present?
+  end
+
   private
 
   # Guarda los cambios de la configuración en el repositorio git