实体框架核心自定义脚手架

本文介绍了实体框架核心自定义脚手架的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我已经完成了SQLServer数据库的搭建。 并在指定的文件夹中创建POCO对象。我想做的是它是从我的基础课扩展而来的。我还使用存储库模式，因此我需要在每个实体上都具有Id密钥，并且我不想在每次重新存储数据库时都进行更改。

I have done scaffolding of my SQLServer database. And it creates the POCO objects in the specified folder. What i would like to do is that it extends from my base class. I also use repository pattern so i need to have Id key on every entity and I don't want to change that each time i rescaffold the database.

Scaffold模型示例

Scaffold Model Example

public partial class Food { public int Id { get; set; } public string Name { get; set; } public string Description { get; set; } public double Price { get; set; } }

预期结果：

public partial class Food : EntityBase { public string Name { get; set; } public string Description { get; set; } public double Price { get; set; } } public class EntityBase : IEntityBase { public int Id { get; set; } }

推荐答案

您可以使用 DbContextWamper

You can use DbContextWriter & EntityTypeWriter to customize scaffold output.

• DBContextWriter = = >> CSharpDbContextGenerator
• EntityTypeWriter == >> CSharpEntityTypeGenerator

写一些自定义类型编写器，您可以覆盖所有内容，您将获得自己的代码生成器：

Write some custom type writer, you can override everything and you will get your own code generator:

//HERE YOU CAN CHANGE THE WAY TYPES ARE GENERATED AND YOU CAN ADD INTERFACE OR BASE CLASS AS PARENT. public class CustomEntitiyTypeWriter : EntityTypeWriter { public CustomEntitiyTypeWriter([NotNull] CSharpUtilities cSharpUtilities) : base(cSharpUtilities) { } // Write Code returns generated code for class and you can raplec it with your base class public override string WriteCode([NotNull] EntityConfiguration entityConfiguration) { var classStr = base.WriteCode(entityConfiguration); var defaultStr = "public partial class " + entityConfiguration.EntityType.Name; var baseStr = "public partial class " + entityConfiguration.EntityType.Name + " : EntityBase"; classStr = classStr.Replace(defaultStr, baseStr); return classStr; } }

在设置中声明它：

public static void ConfigureDesignTimeServices(IServiceCollection services) => services.AddSingleton<EntityTypeWriter, CustomEntitiyTypeWriter>();

然后是脚手架db，您可以使用CustomDBContextWriter对DBContext进行同样的操作。

and then scaffold db, you can do the same for DBContext with CustomDBContextWriter.