From 634c8306449acf19b30d67f6b9202552a3776b7d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Halil=20=C4=B0brahim=20Kalkan?= <hi_kalkan@yahoo.com>
Date: Thu, 15 Dec 2022 18:24:50 +0300
Subject: [PATCH] accept equal versions and update the document

---
 docs/en/Distributed-Event-Bus.md                             | 2 +-
 .../Domain/Entities/Events/Distributed/EntitySynchronizer.cs | 5 ++++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/docs/en/Distributed-Event-Bus.md b/docs/en/Distributed-Event-Bus.md
index 906934a761..2016189a7f 100644
--- a/docs/en/Distributed-Event-Bus.md
+++ b/docs/en/Distributed-Event-Bus.md
@@ -342,7 +342,7 @@ public class ProductSynchronizer : EntitySynchronizer<OrderProduct, Guid, Produc
 
 The main point of this class is it subscribes to the create, update and delete events of the source entity and updates the local entity in the database. It uses the [Object Mapper](Object-To-Object-Mapping.md) system to create or update the `OrderProduct` objects from `ProductEto` objects. So, you should also configure the object mapper to make it properly works. Otherwise, you should manually perform the object mapping by overriding the `MapToEntityAsync(TSourceEntityEto)` and `MapToEntityAsync(TSourceEntityEto,TEntity)` methods in your `ProductSynchronizer` class.
 
-`EntitySynchronizer` is compatible with the *Entity Versioning* system (see the [Entities document](Entities.md)). So, it works as expected even if the events are received as disordered. If the entity's version in your local database is newer than the entity in the received event, then the event is ignored.
+`EntitySynchronizer` is compatible with the *Entity Versioning* system (see the [Entities document](Entities.md)). So, it works as expected even if the events are received as disordered. If the entity's version in your local database is newer than the entity in the received event, then the event is ignored. You should implement the `IHasEntityVersion` interface for the entity and ETO classes (for this example, you should implement for `Product`, `ProductEto` and `OrderProduct` classes).
 
 If you want to ignore some type of change events, you can set `IgnoreEntityCreatedEvent`, `IgnoreEntityUpdatedEvent` and `IgnoreEntityDeletedEvent` in the constructor of your class. Example:
 
diff --git a/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Entities/Events/Distributed/EntitySynchronizer.cs b/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Entities/Events/Distributed/EntitySynchronizer.cs
index 7f37db32a2..b971acc25f 100644
--- a/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Entities/Events/Distributed/EntitySynchronizer.cs
+++ b/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Entities/Events/Distributed/EntitySynchronizer.cs
@@ -161,7 +161,10 @@ public abstract class EntitySynchronizer<TEntity, TSourceEntityEto> :
     {
         if (localEntity is IHasEntityVersion versionedLocalEntity && eto is IHasEntityVersion versionedEto)
         {
-            return Task.FromResult(versionedEto.EntityVersion > versionedLocalEntity.EntityVersion);
+            /* We are also accepting the same version because
+             * the entity may be updated, but the version might not be changed.
+             */
+            return Task.FromResult(versionedEto.EntityVersion >= versionedLocalEntity.EntityVersion);
         }
 
         return Task.FromResult(true);