Filter by enum variable

src/Redis.OM/Common/ExpressionParserUtilities.cs

@@ -411,6 +411,11 @@ private static string GetOperandStringForMember(MemberExpression member, bool tr
                     return string.Join("|", ulids);
                 }
 
+                if (resolvedType.IsEnum && member.Expression is ConstantExpression enumValue)
+                {
+                    return Convert.ToInt32(resolved).ToString();
+                }
+
                 if (resolvedType.IsArray || resolvedType.GetInterfaces().Contains(typeof(IEnumerable)))
                 {
                     var asEnumerable = (IEnumerable)resolved;

test/Redis.OM.Unit.Tests/RediSearchTests/FilterPredicateTest.cs

@@ -193,5 +193,42 @@ public void TestFilterDatetimeFunction()
 
             Assert.Equal("Blah", res[0]["FakeResult"]);
         }
+
+        [Fact]
+        public void TestFilterEnum()
+        {
+            var expectedPredicate = "@Feel == 2";
+            _substitute.Execute(
+                "FT.AGGREGATE",
+                "person-idx",
+                "*",
+                "FILTER",
+                expectedPredicate)
+                .Returns(_mockReply);
+            var collection = new RedisAggregationSet<Person>(_substitute);
+
+            var res = collection.Filter(x => x.RecordShell.Feel == PersonFeel.Happy).ToArray();
+
+            Assert.Equal("Blah", res[0]["FakeResult"]);
+        }
+
+        [Fact]
+        public void TestFilterEnumFromVariable()
+        {
+            var expectedPredicate = "@Feel == 2";
+            _substitute.Execute(
+                "FT.AGGREGATE",
+                "person-idx",
+                "*",
+                "FILTER",
+                expectedPredicate)
+                .Returns(_mockReply);
+            var collection = new RedisAggregationSet<Person>(_substitute);
+
+            PersonFeel feel = PersonFeel.Happy;
+            var res = collection.Filter(x => x.RecordShell.Feel == feel).ToArray();
+
+            Assert.Equal("Blah", res[0]["FakeResult"]);
+        }
     }
 }

test/Redis.OM.Unit.Tests/RediSearchTests/Person.cs

@@ -3,6 +3,14 @@
 
 namespace Redis.OM.Unit.Tests.RediSearchTests
 {
+    public enum PersonFeel : byte
+    {
+        Sad = 0,
+        Upset,
+        Happy,
+        Angry,
+    }
+
     [Document(StorageType = StorageType.Json, IndexName = "person-idx")]
     public partial class Person
     {
@@ -72,6 +80,7 @@ public partial class Person
         [Indexed(Aggregatable = true)] public string FirstName { get; set; }
         [Indexed(Aggregatable = true)] public string LastName { get; set; }
 
-
+        [Indexed]
+        public PersonFeel Feel { get; set; }
     }
 }