Entity Framework 核心脚手架访问方法失败

Question

在运行以下命令之后：

dotnet ef dbcontext scaffold
"Server=SERVERNAME;Database=MYDATABASE;Trusted_Connection=True;"
Microsoft.EntityFrameworkCore.SqlServer -o Models -f

我收到这个错误：

One or more errors occurred. (Attempt by method 'Microsoft.EntityFrameworkCore.Scaffolding.Configuration.Internal.ModelConfiguration.get_EntityConfigurations()' to access method 'Microsoft.EntityFra meworkCore.Metadata.Internal.EntityTypeNameComparer..ctor()' failed.)

project.json:

{
  "userSecretsId": "aspnet-APPLICATION-0799fe3e-6eaf-4c5f-b40e-7c6bfd5dfa9a",
  "dependencies": {
    "Microsoft.NETCore.App": {
      "version": "1.1.0",
      "type": "platform"
    },
    "Microsoft.AspNetCore.Authentication.Cookies": "1.0.0",
    "Microsoft.AspNetCore.Diagnostics": "1.0.0",
    "Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore": "1.0.0",
    "Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.0.0",
    "Microsoft.AspNetCore.Mvc": "1.0.1",
    "Microsoft.AspNetCore.Razor.Tools": {
      "version": "1.0.0-preview2-final",
      "type": "build"
    },
    "Microsoft.AspNetCore.Routing": "1.0.1",
    "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.1",
    "Microsoft.AspNetCore.StaticFiles": "1.0.0",
    "Microsoft.EntityFrameworkCore.Sqlite": "1.0.1",
    "Microsoft.EntityFrameworkCore.Tools": {
      "version": "1.0.0-preview2-final",
      "type": "build"
    },
    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0",
    "Microsoft.Extensions.Configuration.Json": "1.0.0",
    "Microsoft.Extensions.Configuration.UserSecrets": "1.0.0",
    "Microsoft.Extensions.Logging": "1.1.0",
    "Microsoft.Extensions.Logging.Console": "1.0.0",
    "Microsoft.Extensions.Logging.Debug": "1.0.0",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0",
    "Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
      "version": "1.0.0-preview2-update1",
      "type": "build"
    },
    "Microsoft.VisualStudio.Web.CodeGenerators.Mvc": {
      "version": "1.0.0-preview2-update1",
      "type": "build"
    },
    "Microsoft.EntityFrameworkCore.SqlServer": "1.1.0",
    "Microsoft.EntityFrameworkCore.SqlServer.Design": "1.1.0",
    "Microsoft.Extensions.Logging.Abstractions": "1.1.0",
    "Newtonsoft.Json": "9.0.1",
    "Microsoft.AspNetCore.Mvc.Versioning": "1.0.2"
  },
  "tools": {
    "Microsoft.AspNetCore.Razor.Tools": {
      "version": "1.0.0-preview2-final",
      "imports": "portable-net45+win8+dnxcore50"
    },
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": {
      "version": "1.0.0-preview2-final",
      "imports": "portable-net45+win8+dnxcore50"
    },
    "Microsoft.EntityFrameworkCore.Tools": {
      "version": "1.0.0-preview2-final",
      "imports": [
        "portable-net45+win8+dnxcore50",
        "portable-net45+win8"
      ]
    },
    "Microsoft.Extensions.SecretManager.Tools": {
      "version": "1.0.0-preview2-final",
      "imports": "portable-net45+win8+dnxcore50"
    },
    "Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
      "version": "1.0.0-preview2-final",
      "imports": [
        "portable-net45+win8+dnxcore50",
        "portable-net45+win8"
      ]
    }
  },
  "frameworks": {
    "netcoreapp1.1": {
      "imports": [
        "dotnet5.6",
        "dnxcore50",
        "portable-net45+win8"
      ]
    }
  },
  "buildOptions": {
    "debugType": "portable",
    "emitEntryPoint": true,
    "preserveCompilationContext": true
  },
  "runtimeOptions": {
    "configProperties": {
      "System.GC.Server": true
    }
  },
  "publishOptions": {
    "include": [
      "wwwroot",
      "appsettings.json",
      "web.config"
    ]
  },
  "scripts": {
    "prepublish": [
      "npm install",
      "bower install",
      "gulp clean",
      "gulp min"
    ],
    "postpublish": [
      "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%"
    ]
  },
  "tooling": {
    "defaultNamespace": "APPLICATION"
  }
}

网络版本： 1.0.0-preview2-1-003177

跟踪所有版本并使它们协同工作变得不可能。

Answer 1

所以解决方案是：

"dependancies":{
   "Microsoft.EntityFrameworkCore.Tools": "1.1.0-preview4-final",
}

"tools": {
   "Microsoft.EntityFrameworkCore.Tools": "1.1.0-preview4-final",
   "Microsoft.EntityFrameworkCore.Tools.DotNet": " 1.1.0-preview4-final"
},

Answer 2

在安装 .NET Core 1.1 SDK 之前，我遇到了各种错误。

https://www.microsoft.com/net/download/core#/current

是的 - 1.1 版本的文件名是 dotnet-dev-win-x64.1.0.0-preview2-1-003177.exe

我之前和之后

C:\Users\SimonWeaver>dotnet --version
1.0.0-preview2-003131

C:\Users\SimonWeaver>dotnet --version
1.0.0-preview2-1-003177

现在工具可以很好地搭建脚手架了。

再次回顾我看到你已经安装了这个但是我会把它留在这里以防其他人没有。

Entity Framework 核心脚手架访问方法失败

Entity Framework Core Scaffolding Access To Method Failed

asp.net-core

entity-framework-core

asp.net-core-1.1