Fix error in GriddlyParameterAttribute when parameter is a model class

Author: jehhynes

Build/CommonAssemblyInfo.cs

@@ -15,6 +15,6 @@
 //
 // You can specify all the values or you can default the Revision and Build Numbers
 // by using the '*' as shown below:
-[assembly: AssemblyVersion("3.2.7")]
-[assembly: AssemblyFileVersion("3.2.7")]
+[assembly: AssemblyVersion("3.2.8")]
+[assembly: AssemblyFileVersion("3.2.8")]
 //[assembly: AssemblyInformationalVersion("2.5-filters")]

Griddly.Mvc/GriddlyParameterAttribute.cs

@@ -1,5 +1,6 @@
 using Newtonsoft.Json;
 using System;
+using System.Collections;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
@@ -34,7 +35,7 @@ public override void OnActionExecuting(ActionExecutingContext filterContext)
 
                     foreach (var param in filterContext.ActionParameters.ToList())
                     {
-                        if (param.Value != null)
+                        if (param.Value != null && (param.Value.GetType().IsValueType || typeof(IEnumerable).IsAssignableFrom(param.Value.GetType())))
                         {
                             bool isParamSet = context.CookieData?.Values?.ContainsKey(param.Key) == true || parentKeys.Contains(param.Key) || filterContext.RouteData.Values.ContainsKey(param.Key);