From ba90a39f79f63ab9b63ebc55af19982b99a453df Mon Sep 17 00:00:00 2001
From: Frank Wall <fw@moov.de>
Date: Wed, 8 Feb 2017 11:08:01 +0100
Subject: [PATCH] ModelRelationField: soft-fail on missing classes

---
 .../models/OPNsense/Base/FieldTypes/ModelRelationField.php    | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/opnsense/mvc/app/models/OPNsense/Base/FieldTypes/ModelRelationField.php b/src/opnsense/mvc/app/models/OPNsense/Base/FieldTypes/ModelRelationField.php
index ffaf7ff3a..bede7c6ec 100644
--- a/src/opnsense/mvc/app/models/OPNsense/Base/FieldTypes/ModelRelationField.php
+++ b/src/opnsense/mvc/app/models/OPNsense/Base/FieldTypes/ModelRelationField.php
@@ -85,6 +85,10 @@ class ModelRelationField extends BaseField
                 // only handle valid model sources
                 if (isset($modelData['source']) && isset($modelData['items']) && isset($modelData['display'])) {
                     $className = str_replace(".", "\\", $modelData['source']);
+                    // handle optional/missing classes, i.e. from plugins
+                    if (!class_exists($className)) {
+                        continue;
+                    }
                     $modelObj = new $className;
                     foreach ($modelObj->getNodeByReference($modelData['items'])->__items as $node) {
                         $displayKey = $modelData['display'];