From 553dcef3dbc1907cd92f452dbe6ab547398aa748 Mon Sep 17 00:00:00 2001
From: Martin Edenhofer <me@edenhofer.de>
Date: Fri, 8 Sep 2017 17:39:57 +0200
Subject: [PATCH] Improved error handling. Also let migration working if
 already valid records are already in database (then skip this records).

---
 db/migrate/20170905140038_cti_log_preferences_migration.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/db/migrate/20170905140038_cti_log_preferences_migration.rb b/db/migrate/20170905140038_cti_log_preferences_migration.rb
index 56dcb6087..8e1dd0eeb 100644
--- a/db/migrate/20170905140038_cti_log_preferences_migration.rb
+++ b/db/migrate/20170905140038_cti_log_preferences_migration.rb
@@ -33,6 +33,7 @@ class CtiLogPreferencesMigration < ActiveRecord::Migration[5.0]
         # loop over all instances and covert them
         # to an Hash via .attributes
         updated = item.preferences[direction].each_with_object([]) do |caller_id, new_direction|
+          next if !caller_id.respond_to?(:attributes)
           new_direction.push(caller_id.attributes)
         end