Add DeleteNonDefaults Test and AllFieldsMap helper

Author: mythz

src/ServiceStack.OrmLite/OrmLiteReadCommandExtensions.cs

@@ -207,6 +207,13 @@ internal static List<string> AllFields<T>(this object anonType)
             return ret;
         }
 
+        internal static Dictionary<string, object> AllFieldsMap<T>(this object anonType)
+        {
+            var ret = new Dictionary<string, object>();
+            ForEachParam<T>(anonType, excludeDefaults: false, fn: (pi, columnName, value) => ret[pi.Name] = value);
+            return ret;
+        }
+
         internal static List<string> NonDefaultFields<T>(this object anonType)
         {
             var ret = new List<string>();

tests/ServiceStack.OrmLite.Tests/OrmLiteDeleteTests.cs

@@ -4,6 +4,7 @@
 using System.Linq;
 using NUnit.Framework;
 using ServiceStack.Common.Tests.Models;
+using ServiceStack.Text;
 
 namespace ServiceStack.OrmLite.Tests
 {
@@ -123,5 +124,25 @@ public void Can_delete_with_tableName_and_optional_string_params()
             Assert.That(dbRow, Is.Null);
         }
 
+	    [Test]
+	    public void Can_delete_entity_with_nullable_DateTime()
+	    {
+            db.DropAndCreateTable<ModelWithFieldsOfNullableTypes>();
+
+            var row = ModelWithFieldsOfNullableTypes.Create(1);
+            row.NDateTime = null;
+
+            db.Save(row);
+
+            row = db.SingleById<ModelWithFieldsOfNullableTypes>(row.Id);
+
+            var rowsAffected = db.DeleteNonDefaults(row);
+
+            Assert.That(rowsAffected, Is.EqualTo(1));
+
+            row = db.SingleById<ModelWithFieldsOfNullableTypes>(row.Id);
+            Assert.That(row, Is.Null);
+        }
+
 	}
 }