"The expected lock file doesn't exist. Please run "dnu restore"" 在我这样做之后

Question

我正在运行ning beta7 的所有内容，包括 EF 7。我正在尝试使用 ASP.NET 5 应用程序模板项目连接到我的远程现有数据库。我的 project.json 看起来像这样：

{
  "webroot": "wwwroot",
  "userSecretsId": "aspnet5-XXX-409e9e37-b7bb-4185-b7aa-6dc336087524",
  "version": "1.0.0-*",

  "dependencies": {
    "EntityFramework.Commands": "7.0.0-beta7",
    "EntityFramework.SqlServer": "7.0.0-beta7",
    "Microsoft.AspNet.Authentication.Cookies": "1.0.0-beta7",
    "Microsoft.AspNet.Authentication.Facebook": "1.0.0-beta7",
    "Microsoft.AspNet.Authentication.Google": "1.0.0-beta7",
    "Microsoft.AspNet.Authentication.MicrosoftAccount": "1.0.0-beta7",
    "Microsoft.AspNet.Authentication.Twitter": "1.0.0-beta7",
    "Microsoft.AspNet.Diagnostics": "1.0.0-beta7",
    "Microsoft.AspNet.Diagnostics.Entity": "7.0.0-beta7",
    "Microsoft.AspNet.Identity.EntityFramework": "3.0.0-beta7",
    "Microsoft.AspNet.Mvc": "6.0.0-beta7",
    "Microsoft.AspNet.Mvc.TagHelpers": "6.0.0-beta7",
    "Microsoft.AspNet.Server.IIS": "1.0.0-beta7",
    "Microsoft.AspNet.Server.WebListener": "1.0.0-beta7",
    "Microsoft.AspNet.StaticFiles": "1.0.0-beta7",
    "Microsoft.AspNet.Tooling.Razor": "1.0.0-beta7",
    "Microsoft.Framework.Configuration.Abstractions": "1.0.0-beta7",
    "Microsoft.Framework.Configuration.Json": "1.0.0-beta7",
    "Microsoft.Framework.Configuration.UserSecrets": "1.0.0-beta7",
    "Microsoft.Framework.Logging": "1.0.0-beta7",
    "Microsoft.Framework.Logging.Console": "1.0.0-beta7",
    "Microsoft.Framework.Logging.Debug" : "1.0.0-beta7",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-beta7"
  },

  "commands": {
    "web": "Microsoft.AspNet.Hosting --config hosting.ini",
    "ef": "EntityFramework.Commands"
  },

  "frameworks": {
    "dnx451": { },
    "dnxcore50": { }
  },

  "exclude": [
    "wwwroot",
    "node_modules",
    "bower_components"
  ],

  "publishExclude": [
    "node_modules",
    "bower_components",
    "**.xproj",
    "**.user",
    "**.vspscc"
  ],

  "scripts": {
   "prepublish": [ "npm install", "bower install", "gulp clean", "gulp min" ]
  }
}

在线搜索似乎为了完成我想要的，我需要运行以下命令：

dnx ef dbcontext scaffold "ConnectionString" EntityFramework.SqlServer

我做不到，因为我遇到了一个问题，该问题已按照此处的说明解决：

现在我终于可以使用运行命令 "dnx"，但是当我尝试运行使用我的连接字符串连接它时，它看起来像这样：

dnx ef dbcontext scaffold "Data Source=192.168.XX.XXX\devsql;Initial
Catalog=Development;Integrated Security=False;User ID=system;Password=XXX;"
EntityFramework.SqlServer

它给我以下错误：

[ERROR] dnx : System.InvalidOperationException: Failed to resolve the
following dependencies for target framework 'DNXCore,Version=v5.0':
[ERROR] En línea: 1 Carácter: 1 [ERROR] + dnx ef dbcontext scaffold
"Data Source=192.168.XX.XXX\devsql;Initial Catalog=Dev ... [ERROR] +
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[ERROR]     + CategoryInfo          : NotSpecified:
(System.InvalidO...,Version=v5.0'::String) [], RemoteException [ERROR]
+ FullyQualifiedErrorId : NativeCommandError [ERROR]   [ERROR]    EntityFramework.Commands 7.0.0-beta7 [ERROR]   
EntityFramework.SqlServer 7.0.0-beta7 [ERROR]   
Microsoft.AspNet.Authentication.Cookies 1.0.0 [ERROR] -beta7 [ERROR]  
Microsoft.AspNet.Authentication.Facebook 1.0.0-beta7 [ERROR]   
Microsoft.AspNet.Authentication.Google 1.0.0-beta7 [ERROR]   
Microsoft.AspNet.Authentication.MicrosoftAccount 1.0.0-beta7 [ERROR]  
Microsoft.AspNet.Authentication.Twitter 1.0.0-beta7 [ERROR]   
Microsoft.AspNet.Diagnostics 1.0.0-beta7 [ERROR]   
Microsoft.AspNet.Diagnostics.Entity 7.0.0-beta7 [ERROR]   
Microsoft.AspNet.Identity.EntityFramework 3.0.0-beta7 [ERROR]   
Microsoft.AspNet.Mvc 6.0.0-beta7 [ERROR]   
Microsoft.AspNet.Mvc.TagHelpers 6.0.0-beta7 [ERROR]   
Microsoft.AspNet.Server.IIS 1.0.0-beta7 [ERROR]   
Microsoft.AspNet.Server.WebListener 1.0.0-beta7 [ERROR]   
Microsoft.AspNet.StaticFiles 1.0.0-beta7 [ERROR]   
Microsoft.AspNet.Tooling.Razor 1.0.0-beta7 [ERROR]   
Microsoft.Framework.Configuration.Abstractions 1.0.0-beta7 [ERROR]   
Microsoft.Framework.Configuration.Json 1.0.0-beta7 [ERROR]   
Microsoft.Framework.Configuration.UserSecrets 1.0.0-beta7 [ERROR]   
Microsoft.Framework.Logging 1.0.0-beta7 [ERROR]   
Microsoft.Framework.Logging.Console 1.0.0-beta7 [ERROR]   
Microsoft.Framework.Logging.Debug 1.0.0-beta7 [ERROR]   
Microsoft.VisualStudio.Web.BrowserLink.Loader 14.0.0-beta7 [ERROR] 
[ERROR]
C:\XXX\XXX\src\XXX\project.lock.json(1,0):
error: The expected lock file doesn't exist. Please run "dnu restore"
to generate a new lock file. [ERROR] Current runtime target framework:
'DNXCore,Version=v5.0 (dnxcore50)' [ERROR]  Version:     
1.0.0-beta7-15532 [ERROR]  Type:         CoreCLR [ERROR]  Architecture: x64 [ERROR]  OS Name:      Windows [ERROR]  OS Version: 
6.1 [ERROR]  [ERROR]    at Microsoft.Dnx.Runtime.DefaultHost.GetEntryPoint(String
applicationName) [ERROR]    at
Microsoft.Dnx.ApplicationHost.Program.ExecuteMain(DefaultHost host,
String applicationName, String[] args) [ERROR]    at
Microsoft.Dnx.ApplicationHost.Program.Main(String[] args) [ERROR] ---
End of stack trace from previous location where exception was thrown
--- [ERROR]    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() [ERROR]
at Microsoft.Dnx.Runtime.Common.EntryPointExecutor.Execute(Assembly
assembly, String[] args, IServiceProvider serviceProvider) [ERROR]   
at Microsoft.Dnx.Host.Bootstrapper.RunAsync(List`1 args,
IRuntimeEnvironment env, FrameworkName targetFramework) [ERROR]    at
Microsoft.Dnx.Host.RuntimeBootstrapper.ExecuteAsync(String[] args,
FrameworkName targetFramework) [ERROR]    at
Microsoft.Dnx.Host.RuntimeBootstrapper.Execute(String[] args,
FrameworkName targetFramework) [ERROR]

鉴于

[ERROR]
C:\XXX\XXX\src\XXX\project.lock.json(1,0):
error: The expected lock file doesn't exist. Please run "dnu restore"
to generate a new lock file.

我试过了运行宁

PS C:\XXX\XXX> dnu restore
Microsoft .NET Development Utility CoreCLR-x64-1.0.0-beta7-15532

CACHE https://api.nuget.org/v3/index.json Restoring packages for
C:\XXX\XXX\src\XXX\project.json   CACHE
https://api.nuget.org/v3-flatcontainer/system.threading.threadpool/index.json
GET
https://api.nuget.org/v3-flatcontainer/system.net.sockets/index.json  
OK
https://api.nuget.org/v3-flatcontainer/system.net.sockets/index.json
1117ms Writing lock file
C:\XXX\XXX\src\XXX\project.lock.json Restore
complete, 2071ms elapsed

NuGet Config files used:
    C:\Users\XXX\AppData\Roaming\NuGet\NuGet.Config
    C:\XXX\XXX\NuGet.Config

Feeds used:
    https://api.nuget.org/v3-flatcontainer/

似乎成功地重新创建了 project.lock.json（时间戳也反映了这一点）。但是，当我再次尝试运行ning 我的脚手架脚本时，它一直显示上面显示的相同错误，包括 "expected lock file doesn't exist" 部分。

知道出了什么问题吗？

Answer 1

如果您在 Windows 服务器内核环境中当前正在执行的应用程序上运行执行此命令，则 Core 5.0 将无法正常工作。它可以读取一些，但不能创建，特别是如果您在 IIS 中托管。我经常遇到这个问题，我发现最好跳过主要依赖项中的 EntityFramework.Commands，然后跳转到

"frameworks":{
    "dnx451":{
          "dependencies":{
                 "EntityFramework.Commands":"7.0.0-beta7"
          }
      }
  ,"dnxcore50"...

此外，请确保您准备好运行 dnx，运行

dnvm use latest -r clr -arch {your server kernel arch} x64|x86

以确保您没有尝试为命令调用 coreclr。这应该可以解决这个问题，它对我来说是在生产服务器上（因为搭建 dbcontext 基本上是无害的）

Answer 2

试试这个：

关闭 Visual Studio 完全.

打开 Visual Studio 命令提示符 window。

cd C:\XXX\XXX\src\XXX\

dnu restore

dnx ef dbcontext scaffold "ConnectionString" EntityFramework.SqlServer

Answer 3

我遇到了同样的问题，并通过以下方式解决了这个问题： - 右击 "References" - Select "Restore Packages"

或 Ctrl + Shilf + R

它将 create/update "project.lock.json" 文件，其中包含应用正在使用的所有 NuGet 包的完整列表。在我看来，你不应该把它放在源代码管理中

Answer 4

我遇到了同样的问题，尝试删除引用并重新添加它们但失败了。我去了 ManageNugetPackage 管理器并从设置中删除了私有内部 nuget 资源并恢复了我的包并且它有效（我还删除了旧的 project.lock 文件）

Answer 5

我发现如果您在 UNC 路径上创建 visual studio 解决方案文件夹，将会发生此错误。

在虚拟机上使用 windows 时，UNC 路径通常会映射您的文档文件夹（例如 Mac 的 Parallels），因此 visual studio 将默认使用此路径用于新解决方案.

为了解决这个问题，我将 visual studio 解决方案文件夹移动到虚拟机磁盘驱动器，然后重新打开项目。

Answer 6

我在 VS 2015 中遇到了类似的问题，抱怨 AspNetCore 引用的恢复失败以及指向执行 "dotnet restore" 的错误消息之一。在最后的步骤中，dotnet restore 失败。但是，

有效的解决方案是使用 Nuget 包管理器设置删除本地 nuget 包提要引用。

"The expected lock file doesn't exist. Please run "dnu restore"" 在我这样做之后

"The expected lock file doesn't exist. Please run "dnu restore"" right after I have done so

c#

json

entity-framework-core

dnx

asp.net-core