Translate PostgreSQL document

docs/en/Best-Practices/PostgreSQL-Integration.md

@@ -5,10 +5,10 @@
 ### EntityFrameworkCore Project Update
 
 - In `Acme.BookStore.EntityFrameworkCore` project replace package `Volo.Abp.EntityFrameworkCore.SqlServer` with `Volo.Abp.EntityFrameworkCore.PostgreSql` 
-- Update to use PostgreSQL in `BookStoreEntityFrameworkCoreModule`. 
-- Replace the `AbpEntityFrameworkCoreSqlServerModule` with the `AbpEntityFrameworkCorePostgreSqlModule`
-- Replace the `options.UseSqlServer()` with the `options.UsePostgreSql()`
-- In other projects update the PostgreSQL connection string in necessary `appsettings.json` files.
+- Update to use PostgreSQL in `BookStoreEntityFrameworkCoreModule`
+  - Replace the `AbpEntityFrameworkCoreSqlServerModule` with the `AbpEntityFrameworkCorePostgreSqlModule`
+  - Replace the `options.UseSqlServer()` with the `options.UsePostgreSql()`
+- In other projects update the PostgreSQL connection string in necessary `appsettings.json` files
 
 #### Delete Existing Migrations
 

docs/zh-Hans/Best-Practices/PostgreSQL-Integration.md

@@ -0,0 +1,35 @@
+## Entity Framework Core PostgreSQL 集成
+
+> 参阅 [Entity Framework Core 集成文档](../Entity-Framework-Core.md) 了解集成EF Core的基础知识.
+
+### 更新 EntityFrameworkCore 项目
+
+- 在 `Acme.BookStore.EntityFrameworkCore` 中将包 `Volo.Abp.EntityFrameworkCore.SqlServer` 替换为 `Volo.Abp.EntityFrameworkCore.PostgreSql` 
+- 打开 `BookStoreEntityFrameworkCoreModule` 模块类
+  - 将 `AbpEntityFrameworkCoreSqlServerModule` 替换为 `AbpEntityFrameworkCorePostgreSqlModule`
+  - 将 `options.UseSqlServer()` 替换为 `options.UsePostgreSql()`
+- 在其他的项目中将 `appsetting.json` 文件中的连接字符串更新为PostgreSQL链接字符串
+
+#### 删除现有迁移
+
+删除所有的现有迁移文件 (包括 `DbContextModelSnapshot`)
+
+![postgresql-delete-initial-migrations](images/postgresql-delete-initial-migrations.png)
+
+#### 生成生成迁移并更新数据库
+
+设置正确的启动项目 (通常是Web项目),
+打开 **程序包管理器控制台** (工具 -> Nuget包管理器 -> 程序包管理器控制台), 选择 `Acme.BookStore.EntityFrameworkCore.DbMigrations` 做为 **默认项目** 并执行以下命令:
+
+运行 `Add-Migration` 命令.
+````
+PM> Add-Migration Initial
+````
+
+然后执行 `Update-Database` 执行更新数据库:
+
+````
+PM> Update-Database
+````
+
+![postgresql-update-database](images/postgresql-update-database.png)

docs/zh-Hans/docs-nav.json

@@ -237,7 +237,13 @@
       "items": [
         {
           "text": "Entity Framework Core 集成",
-          "path": "Entity-Framework-Core.md"
+          "path": "Entity-Framework-Core.md",
+          "items": [            
+            {
+              "text": "PostgreSQL 集成",
+              "path": "Best-Practices/PostgreSQL-Integration.md"
+            }
+          ]
         },
         {
           "text": "MongoDB 集成",