迁移:程序集中未找到DbContext [英] Migration: No DbContext was found in assembly

问题描述

使用VS Community2017.我尝试创建初始迁移，并显示错误消息:

Using VS Community 2017. I have tried to create initial migration with error message saying:

同时安装了Entity Framework Core和Entity Framework 6.实体框架核心工具正在运行.对实体框架6使用'EntityFramework \ Add-Migration'. 在程序集"Test_Project"中找不到DbContext.确保使用正确的程序集，并且类型既不是抽象的也不是泛型的.

Both Entity Framework Core and Entity Framework 6 are installed. The Entity Framework Core tools are running. Use 'EntityFramework\Add-Migration' for Entity Framework 6. No DbContext was found in assembly 'Test_Project'. Ensure that you're using the correct assembly and that the type is neither abstract nor generic.

...我的dbcontext中的代码:

... code in my dbcontext:

protected override void OnModelCreating(DbModelBuilder mb)
{
    base.OnModelCreating(mb);

    mb.Entity<Stuff>().ToTable("Stuff");

}

public DbSet<Stuff> Stuff{ get; set; }

推荐答案

在程序包管理器控制台中，选择定义DbContext的项目，然后运行命令add-migration initial. 例如:public class SomeContext : DbContext

In the Package Manager Console select the project where the DbContext is defined and run the command add-migration initial. For example:public class SomeContext : DbContext

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