From 57f937cfa824fe8bb0566ea7fc03b17919381c1d Mon Sep 17 00:00:00 2001
From: "JUSTUSWORKPC\\Justus" <jasdefer>
Date: Thu, 24 Nov 2016 15:13:24 +0100
Subject: [PATCH] Fixed updating relationships, when no attributes are
 specified.

---
 src/NJsonApiCore.Web.MVCCore.HelloWorld/Models/Person.cs | 4 ++++
 src/NJsonApiCore/ResourceMapping.cs                      | 6 ++++++
 2 files changed, 10 insertions(+)

diff --git a/src/NJsonApiCore.Web.MVCCore.HelloWorld/Models/Person.cs b/src/NJsonApiCore.Web.MVCCore.HelloWorld/Models/Person.cs
index 7643577..a089346 100644
--- a/src/NJsonApiCore.Web.MVCCore.HelloWorld/Models/Person.cs
+++ b/src/NJsonApiCore.Web.MVCCore.HelloWorld/Models/Person.cs
@@ -2,6 +2,10 @@
 {
     public class Person
     {
+        public Person()
+        {
+        }
+
         public Person(string firstname, string lastname, string twitter)
         {
             Id = StaticPersistentStore.GetNextId();
diff --git a/src/NJsonApiCore/ResourceMapping.cs b/src/NJsonApiCore/ResourceMapping.cs
index 1c84d16..c1025d5 100644
--- a/src/NJsonApiCore/ResourceMapping.cs
+++ b/src/NJsonApiCore/ResourceMapping.cs
@@ -78,8 +78,14 @@ public Dictionary<string, object> GetAttributes(object objectGraph)
         // TODO ROLA - type handling must be better in here
         public Dictionary<string, object> GetValuesFromAttributes(Dictionary<string, object> attributes)
         {
+            
             var values = new Dictionary<string, object>();
 
+            if (attributes == null)
+            {
+                return values;
+            }
+
             foreach (var propertySetter in PropertySettersExpressions)
             {
                 object value;