Fix bugs after i18n_variable removal

app/models/site.rb

@@ -42,17 +42,15 @@ class Site
   end
 
   METAS.each do |meta|
-    define_method meta do
+    define_method meta do |locale|
       fetch_meta = self.site_metas.where(key: meta).limit(1)
-      fetch_meta.blank? ? nil : fetch_meta[0].i18n_variable
+      fetch_meta.blank? ? nil : fetch_meta[0].title_translations[locale]
     end
     define_method "#{meta}=" do |values|
-      if a = self.send(meta)
-        a.update_attributes(values)
-      else
-        a = self.site_metas.build(key: meta)
-        a.build_i18n_variable(values)
-      end
+      fetch_meta = self.site_metas.where(key: meta).limit(1)[0] rescue nil   
+      fetch_meta = self.site_metas.build(key: meta) if fetch_meta.blank?
+      fetch_meta.title_translations = values
+      fetch_meta.save
     end
   end