From 03995534542570d960c8653a3f5afc6f51aca86f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ahmet=20Bu=C4=9Fra=20K=C3=B6sen?=
 <bugrakosen@windowslive.com>
Date: Thu, 31 Oct 2024 16:06:14 +0300
Subject: [PATCH] fix: Add null support to DateEqualTo

---
 ExpressionBuilder/ExpressionBuilder.csproj  | 2 +-
 ExpressionBuilder/Operations/DateEqualTo.cs | 7 +++++--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/ExpressionBuilder/ExpressionBuilder.csproj b/ExpressionBuilder/ExpressionBuilder.csproj
index 0bfadf1..f4ebef6 100644
--- a/ExpressionBuilder/ExpressionBuilder.csproj
+++ b/ExpressionBuilder/ExpressionBuilder.csproj
@@ -18,7 +18,7 @@
 		</Description>
 		<AssemblyVersion>1.0.0.0</AssemblyVersion>
 		<AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
-		<Version>1.0.12</Version>
+		<Version>1.0.13</Version>
 		<GeneratePackageOnBuild>false</GeneratePackageOnBuild>
 		<PackageId>Milvasoft.ExpressionBuilder</PackageId>
 	</PropertyGroup>
diff --git a/ExpressionBuilder/Operations/DateEqualTo.cs b/ExpressionBuilder/Operations/DateEqualTo.cs
index 472e5d1..606c598 100644
--- a/ExpressionBuilder/Operations/DateEqualTo.cs
+++ b/ExpressionBuilder/Operations/DateEqualTo.cs
@@ -17,8 +17,11 @@ public DateEqualTo() : base(nameof(DateEqualTo), ValueCount, TypeGroup.Date) { }
     /// <inheritdoc />
     public override Expression GetExpression(MemberExpression member, ConstantExpression constant1, ConstantExpression constant2)
     {
-        if (!IsDateType(constant1) || constant1.Value == null)
-            throw new InvalidDataException("DateEqualTo can be used with only date types and cannot be null");
+        if (!IsDateType(constant1))
+            throw new InvalidDataException("DateEqualTo can be used with only date types");
+
+        if (constant1.Value == null)
+            return Expression.Equal(member, constant1);
 
         var (startDateExpression, endDateExpression) = GetStartAndEndDates(constant1);