From ac622ac7f0d43644090faa2fcc4817f5ad1d3301 Mon Sep 17 00:00:00 2001
From: Thomas Gelf <thomas@gelf.net>
Date: Mon, 30 Nov 2015 13:31:28 +0100
Subject: [PATCH] ImportSourceForm: do not fail on missing hook

---
 application/forms/ImportSourceForm.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/application/forms/ImportSourceForm.php b/application/forms/ImportSourceForm.php
index 4ed76643..998a9e2a 100644
--- a/application/forms/ImportSourceForm.php
+++ b/application/forms/ImportSourceForm.php
@@ -56,6 +56,10 @@ class ImportSourceForm extends DirectorObjectForm
             return null;
         }
 
+        if (! class_exists($class)) {
+            return null;
+        }
+
         return $class::getDefaultKeyColumnName();
     }