fix: NetworkVariables of enum types breaking the inspector [MTT-6212]

com.unity.netcode.gameobjects/CHANGELOG.md

@@ -17,6 +17,7 @@ Additional documentation and release notes are available at [Multiplayer Documen
 - Fixed issue where a client could throw an exception if abruptly disconnected from a network session with one or more spawned `NetworkObject`(s). (#2510)
 - Fixed issue where invalid endpoint addresses were not being detected and returning false from NGO UnityTransport. (#2496)
 - Fixed some errors that could occur if a connection is lost and the loss is detected when attempting to write to the socket. (#2495)
+- Fixed the inspector throwing exceptions when attempting to render `NetworkVariable`s of enum types. (#2529)
 
 ## Changed
 

com.unity.netcode.gameobjects/Editor/NetworkBehaviourEditor.cs

@@ -81,7 +81,25 @@ private void RenderNetworkVariable(int index)
             EditorGUILayout.BeginHorizontal();
             if (genericType.IsValueType)
             {
-                var method = typeof(NetworkBehaviourEditor).GetMethod("RenderNetworkContainerValueType", BindingFlags.Public | BindingFlags.Instance | BindingFlags.FlattenHierarchy | BindingFlags.NonPublic);
+               var isEquatable = false;
+                foreach (var iface in genericType.GetInterfaces())
+                {
+                    if (iface.IsGenericType && iface.GetGenericTypeDefinition() == typeof(IEquatable<>))
+                    {
+                        isEquatable = true;
+                    }
+                }
+
+                MethodInfo method;
+                if (isEquatable)
+                {
+                    method = typeof(NetworkBehaviourEditor).GetMethod("RenderNetworkContainerValueTypeIEquatable", BindingFlags.Public | BindingFlags.Instance | BindingFlags.FlattenHierarchy | BindingFlags.NonPublic);
+                }
+                else
+                {
+                    method = typeof(NetworkBehaviourEditor).GetMethod("RenderNetworkContainerValueType", BindingFlags.Public | BindingFlags.Instance | BindingFlags.FlattenHierarchy | BindingFlags.NonPublic);
+                }
+
                 var genericMethod = method.MakeGenericMethod(genericType);
                 genericMethod.Invoke(this, new[] { (object)index });
             }
@@ -94,7 +112,23 @@ private void RenderNetworkVariable(int index)
             }
         }
 
-        private void RenderNetworkContainerValueType<T>(int index) where T : unmanaged, IEquatable<T>
+        private void RenderNetworkContainerValueType<T>(int index) where T : unmanaged
+        {
+            try
+            {
+                var networkVariable = (NetworkVariable<T>)m_NetworkVariableFields[m_NetworkVariableNames[index]].GetValue(target);
+                RenderNetworkVariableValueType(index, networkVariable);
+            }
+            catch (Exception e)
+            {
+                Debug.Log(e);
+                throw;
+            }
+
+            EditorGUILayout.EndHorizontal();
+        }
+
+        private void RenderNetworkContainerValueTypeIEquatable<T>(int index) where T : unmanaged, IEquatable<T>
         {
             try
             {