Merge branch 'rel-3.2' into dev

docs/en/Getting-Started.md

@@ -115,6 +115,21 @@ abp new Acme.BookStore{{if UI == "NG"}} -u angular{{else if UI == "Blazor"}} -u
 
 The solution has a layered structure (based on the [Domain Driven Design](Domain-Driven-Design.md)) and contains unit & integration test projects. See the [application template document](Startup-Templates/Application.md) to understand the solution structure in details. 
 
+{{ if DB == "Mongo" }}
+
+#### MongoDB Transactions
+
+The [startup template](Startup-templates/Index.md) **disables** transactions in the `.MongoDB` project by default. If your MongoDB server supports transactions, you can enable the it in the *YourProjectMongoDbModule* class:
+
+  ```csharp
+  Configure<AbpUnitOfWorkDefaultOptions>(options =>
+  {
+      options.TransactionBehavior = UnitOfWorkTransactionBehavior.Enabled;
+  });
+  ```
+
+{{ end }}
+
 ## Create the Database
 
 ### Connection String

docs/en/MongoDB.md

@@ -275,16 +275,14 @@ public class BookService
 
 > Important: You must reference to the `Volo.Abp.MongoDB` package from the project you want to access to the MongoDB API. This breaks encapsulation, but this is what you want in that case.
 
-#### Transaction
+### Transactions
 
-Starting from version 4.0, MongoDB supports transactions. ABP added support for MongoDB transactions in version 3.2. If you upgrade the project to version 3.2. You need add [MongoDbSchemaMigrator](https://github.com/abpframework/abp/blob/dev/templates/app/aspnet-core/src/MyCompanyName.MyProjectName.MongoDB/MongoDb/MongoDbMyProjectNameDbSchemaMigrator.cs) to your `.MongoDB` project.
-
-If you are using MongoDB server version less then v4.0, you need disabled the `transaction` of unit of work manually:
+MongoDB supports multi-document transactions starting from the version 4.0 and the ABP Framework supports it. However, the [startup template](Startup-templates/Index.md) **disables** transactions by default. If your MongoDB **server** supports transactions, you can enable the it in the *YourProjectMongoDbModule* class:
 
 ```csharp
 Configure<AbpUnitOfWorkDefaultOptions>(options =>
 {
-    options.TransactionBehavior = UnitOfWorkTransactionBehavior.Disabled;
+    options.TransactionBehavior = UnitOfWorkTransactionBehavior.Enabled;
 });
 ```
 

docs/zh-Hans/Getting-Started.md

@@ -153,6 +153,19 @@ abp new Acme.BookStore{{if UI == "NG"}} -u angular {{end}}{{if DB == "Mongo"}} -
 
 > 请参阅[应用程序模板文档](Startup-Templates/Application.md)详细了解解决方案结构.
 
+{{ if DB == "Mongo" }}
+
+> [启动模板](Startup-templates/Index.md)默认在 `.MongoDB` 项目中**禁用**了工作单元事务. 如果你的MongoDB服务器支持事务,你可以手动启用工作单元的事务:
+
+  ```csharp
+  Configure<AbpUnitOfWorkDefaultOptions>(options =>
+  {
+      options.TransactionBehavior = UnitOfWorkTransactionBehavior.Enabled;
+  });
+  ```
+
+{{ end }}
+
 ## 创建数据库
 
 ### 连接字符串

docs/zh-Hans/MongoDB.md

@@ -237,12 +237,12 @@ public class BookService
 
 MongoDB在4.0版本开始支持事务, ABP在3.2版本加入了对MongoDb事务的支持. 如果你升级到3.2版本,需要将[MongoDbSchemaMigrator](https://github.com/abpframework/abp/blob/dev/templates/app/aspnet-core/src/MyCompanyName.MyProjectName.MongoDB/MongoDb/MongoDbMyProjectNameDbSchemaMigrator.cs)添加到你的 `.MongoDB` 项目中.
 
-如果你在使用4.0版本之前的MongdoDB数据库,你需要手动禁用工作单元的事务:
+[启动模板](Startup-templates/Index.md)默认在 `.MongoDB` 项目中**禁用**了工作单元事务. 如果你的MongoDB服务器支持事务,你可以手动启用工作单元的事务:
 
 ```csharp
 Configure<AbpUnitOfWorkDefaultOptions>(options =>
 {
-    options.TransactionBehavior = UnitOfWorkTransactionBehavior.Disabled;
+    options.TransactionBehavior = UnitOfWorkTransactionBehavior.Enabled;
 });
 ```
 

templates/app/aspnet-core/src/MyCompanyName.MyProjectName.MongoDB/MongoDb/MyProjectNameMongoDbModule.cs

@@ -8,6 +8,7 @@ using Volo.Abp.Modularity;
 using Volo.Abp.PermissionManagement.MongoDB;
 using Volo.Abp.SettingManagement.MongoDB;
 using Volo.Abp.TenantManagement.MongoDB;
+using Volo.Abp.Uow;
 
 namespace MyCompanyName.MyProjectName.MongoDB
 {
@@ -30,6 +31,11 @@ namespace MyCompanyName.MyProjectName.MongoDB
             {
                 options.AddDefaultRepositories();
             });
+
+            Configure<AbpUnitOfWorkDefaultOptions>(options =>
+            {
+                options.TransactionBehavior = UnitOfWorkTransactionBehavior.Disabled;
+            });
         }
     }
 }