'；微软EntityFrameworkCore.工具'；未安装在Scaffold DbContext上的项目

本文关键字：DbContext 项目 Scaffold 微软 EntityFrameworkCore 工具 安装 | 更新日期: 2023-09-27 17:58:49

我正在学习这里列出的教程：

https://docs.efproject.net/en/latest/platforms/aspnetcore/existing-db.html

但是，我不希望在WebApplication项目中包含DB上下文，而是希望DB上下文、实体等位于另一个项目中。NET核心类库。

通过更新libraries project.json文件以包含"netcoreapp1.0"框架，我解决了一些早期的兼容性问题。

project.json

之前：

{
    "version": "1.0.0-*",
    "dependencies": {
        "NETStandard.Library": "1.6.0"
    },
    "frameworks": {
        "netstandard1.6": {
            "imports": "dnxcore50"
        }
    }
}

之后：

{
  "version": "1.0.0-*",
  "frameworks": {
    "netcoreapp1.0": {
      "imports": [ "portable-net451+win8" ],
      "buildOptions": {
        "emitEntryPoint": true
      },
      "dependencies": {
        "Microsoft.EntityFrameworkCore.SqlServer": "1.0.0",
        "Microsoft.EntityFrameworkCore.SqlServer.Design": "1.0.0",
        "Microsoft.NETCore.App": {
          "type": "platform",
          "version": "1.0.0-*"
        },
        "Microsoft.EntityFrameworkCore": "1.0.0-*",
        "Microsoft.EntityFrameworkCore.Tools": "1.0.0-*"
      },
      "tools": {
        "Microsoft.EntityFrameworkCore.Tools": "1.0.0-*"
      }
    },
    "netstandard1.6": {
      "imports": "dnxcore50",
      "dependencies": {
        "NETStandard.Library": "1.6.0"
      }
    }
  }
}

教程接着说，为了"逆向工程您的模型"，必须在包管理器控制台中运行以下命令：

Scaffold-DbContext "Server=(localdb)'mssqllocaldb;Database=Blogging;Trusted_Connection=True;" Microsoft.EntityFrameworkCore.SqlServer -OutputDir Models

我收到以下错误消息：

Cannot execute this command because 'Microsoft.EntityFrameworkCore.Tools' is not installed in project 'src'DB'. Add 'Microsoft.EntityFrameworkCore.Tools' to the 'tools' section in project.json. See http://go.microsoft.com/fwlink/?LinkId=798221 for more details.

其中DB是类库的名称。

你可以清楚地看到微软。EntityFrameworkCore。工具部分中的工具。所以我不知道该怎么办。

'；微软EntityFrameworkCore.工具'；未安装在Scaffold DbContext上的项目

project.json模式中定义的"framework"部分中没有工具部分。

这个应该能正常工作

{
  "version": "1.0.0-*",
  "dependencies": {
    "Microsoft.EntityFrameworkCore.SqlServer": "1.0.0",
    "Microsoft.EntityFrameworkCore.SqlServer.Design": "1.0.0",
    "Microsoft.EntityFrameworkCore": "1.0.0-*",
    "Microsoft.EntityFrameworkCore.Tools": "1.0.0-*"
  },
  "tools": {
    "Microsoft.EntityFrameworkCore.Tools": "1.0.0-*"
  },
  "frameworks": {
    "netcoreapp1.0": {
      "imports": [ "portable-net451+win8" ],
      "buildOptions": {
        "emitEntryPoint": true
      },
      "dependencies": {
        "Microsoft.NETCore.App": {
          "type": "platform",
          "version": "1.0.0-*"
        }
      }
    },
    "netstandard1.6": {
      "imports": "dnxcore50",
      "dependencies": {
        "NETStandard.Library": "1.6.0"
      }
    }
  }
}
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