From ae1b053189aa7b61a344e0362f53c4e0c4169548 Mon Sep 17 00:00:00 2001
From: 2881099 <2881099@qq.com>
Date: Fri, 6 May 2022 12:40:06 +0800
Subject: [PATCH] =?UTF-8?q?-=20=E5=A2=9E=E5=8A=A0=20HavingIf=20=E6=96=B9?=
 =?UTF-8?q?=E6=B3=95=EF=BC=9B#1095?=
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---
 FreeSql/Interface/Curd/ISelect/ISelectGrouping.cs        | 9 ++++++++-
 .../SelectProvider/SelectGroupingProvider.cs             | 1 +
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/FreeSql/Interface/Curd/ISelect/ISelectGrouping.cs b/FreeSql/Interface/Curd/ISelect/ISelectGrouping.cs
index c787cc61..3f081a79 100644
--- a/FreeSql/Interface/Curd/ISelect/ISelectGrouping.cs
+++ b/FreeSql/Interface/Curd/ISelect/ISelectGrouping.cs
@@ -19,11 +19,18 @@ namespace FreeSql
 #endif
 
         /// <summary>
-        /// 按聚合条件过滤，Where(a => a.Count() > 10)
+        /// 按聚合条件过滤，Having(a => a.Count() > 10)
         /// </summary>
         /// <param name="exp">lambda表达式</param>
         /// <returns></returns>
         ISelectGrouping<TKey, TValue> Having(Expression<Func<ISelectGroupingAggregate<TKey, TValue>, bool>> exp);
+        /// <summary>
+        /// 按聚合条件过滤，HavingIf(true, a => a.Count() > 10)
+        /// </summary>
+        /// <param name="condition">true 时生效</param>
+        /// <param name="exp">lambda表达式</param>
+        /// <returns></returns>
+        ISelectGrouping<TKey, TValue> HavingIf(bool condition, Expression<Func<ISelectGroupingAggregate<TKey, TValue>, bool>> exp);
 
         /// <summary>
         /// 按列排序，OrderBy(a => a.Time)
diff --git a/FreeSql/Internal/CommonProvider/SelectProvider/SelectGroupingProvider.cs b/FreeSql/Internal/CommonProvider/SelectProvider/SelectGroupingProvider.cs
index 2f0e0703..383c1ed2 100644
--- a/FreeSql/Internal/CommonProvider/SelectProvider/SelectGroupingProvider.cs
+++ b/FreeSql/Internal/CommonProvider/SelectProvider/SelectGroupingProvider.cs
@@ -226,6 +226,7 @@ namespace FreeSql.Internal.CommonProvider
             return this;
         }
 
+        public ISelectGrouping<TKey, TValue> HavingIf(bool condition, Expression<Func<ISelectGroupingAggregate<TKey, TValue>, bool>> exp) => condition ? Having(exp) : this;
         public ISelectGrouping<TKey, TValue> Having(Expression<Func<ISelectGroupingAggregate<TKey, TValue>, bool>> exp)
         {
             _lambdaParameter = exp?.Parameters[0];