From 7946235c62aac09060cc158601f3a621f0f96109 Mon Sep 17 00:00:00 2001
From: sunkaixuan <610262374@qq.com>
Date: Mon, 22 Jan 2018 11:35:48 +0800
Subject: [PATCH] -

---
 .../Abstract/ExpressionableProvider/Expressionable.cs         | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Src/Asp.Net/SqlSugar/Abstract/ExpressionableProvider/Expressionable.cs b/Src/Asp.Net/SqlSugar/Abstract/ExpressionableProvider/Expressionable.cs
index 1bd63967b..af8da48aa 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/ExpressionableProvider/Expressionable.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/ExpressionableProvider/Expressionable.cs
@@ -8,7 +8,7 @@ namespace SqlSugar
 {
     public class Expressionable<T> where T : class, new()
     {
-        Expression<Func<T, bool>> _exp = it=>true;
+        Expression<Func<T, bool>> _exp = null;
 
         public Expressionable<T> And(Expression<Func<T, bool>> exp)
         {
@@ -45,6 +45,8 @@ namespace SqlSugar
 
         public Expression<Func<T, bool>> ToExpression()
         {
+            if (_exp == null)
+                _exp = it => true;
             return _exp;
         }
     }