From 8c2e8834e16c0fc747561256a8597b0f8a9e88c7 Mon Sep 17 00:00:00 2001
From: maliming <malimings@gmail.com>
Date: Mon, 24 Oct 2022 21:00:40 +0800
Subject: [PATCH] Improve the performance when `totalCount` is 0.

Resolve #14228
---
 .../Services/AbstractKeyReadOnlyAppService.cs     | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/framework/src/Volo.Abp.Ddd.Application/Volo/Abp/Application/Services/AbstractKeyReadOnlyAppService.cs b/framework/src/Volo.Abp.Ddd.Application/Volo/Abp/Application/Services/AbstractKeyReadOnlyAppService.cs
index b3aa8e43a4..e56e3ff042 100644
--- a/framework/src/Volo.Abp.Ddd.Application/Volo/Abp/Application/Services/AbstractKeyReadOnlyAppService.cs
+++ b/framework/src/Volo.Abp.Ddd.Application/Volo/Abp/Application/Services/AbstractKeyReadOnlyAppService.cs
@@ -63,14 +63,19 @@ public abstract class AbstractKeyReadOnlyAppService<TEntity, TGetOutputDto, TGet
         await CheckGetListPolicyAsync();
 
         var query = await CreateFilteredQueryAsync(input);
-
         var totalCount = await AsyncExecuter.CountAsync(query);
 
-        query = ApplySorting(query, input);
-        query = ApplyPaging(query, input);
+        var entities = new List<TEntity>();
+        var entityDtos = new List<TGetListOutputDto>();
+
+        if (totalCount > 0)
+        {
+            query = ApplySorting(query, input);
+            query = ApplyPaging(query, input);
 
-        var entities = await AsyncExecuter.ToListAsync(query);
-        var entityDtos = await MapToGetListOutputDtosAsync(entities);
+            entities = await AsyncExecuter.ToListAsync(query);
+            entityDtos = await MapToGetListOutputDtosAsync(entities);
+        }
 
         return new PagedResultDto<TGetListOutputDto>(
             totalCount,