#428

backend/app/services/tag_version_recorder.rb

@@ -18,7 +18,11 @@ class TagVersionRecorder < VersionRecorder
 
   def snapshot_attributes
     names = snapshot_names
-    compatibility_names = names['ja'] || names.fetch('ain')
+    compatibility_names = names['ja'] || names['ain'] || names.values.first
+    unless compatibility_names
+      @record.errors.add(:tag_names, :invalid)
+      raise ActiveRecord::RecordInvalid, @record
+    end
     parent_ids =
         TagImplication.where(tag_id: @record.id).order(:parent_tag_id)
         .lock.pluck(:parent_tag_id)
@@ -35,12 +39,18 @@ class TagVersionRecorder < VersionRecorder
     @record.tag_names.order(:language_code, :name).lock.group_by(&:language_code)
         .transform_values do |tag_names|
       primary = tag_names.find(&:primary?)
+      unless primary
+        @record.errors.add(:tag_names, :invalid,
+                           language_code: tag_names.first.language_code)
+        raise ActiveRecord::RecordInvalid, @record
+      end
       aliases = tag_names.reject(&:primary?).sort_by(&:name).map { |tag_name|
-        { 'name' => tag_name.name, 'script_code' => tag_name.script_code }
+        { 'name' => tag_name.name,
+          'script_code' => Script.codes.fetch(tag_name.script_code, tag_name.script_code) }
       }
 
       { 'name' => primary.name,
-        'script_code' => primary.script_code,
+        'script_code' => Script.codes.fetch(primary.script_code, primary.script_code),
         'auto_generated' => primary.auto_generated,
         'aliases' => aliases }
     end