EF Core RC2 迁移在发布/部署期间失败

Question

在为小型测试 ASP.NET Core MVC 项目运行发布时，我在针对实时数据库自动运行迁移时遇到了一些困难。

如果我同时发布 Settings / Databases / Default Connection / Use this connection string at runtime 和 Settings / Databases / Entity Framework Migrations / ApplicationDbContext 未选中，则网站发布很好，但正如预期的那样，数据库保持不变。

如果我使用 Settings / Databases / Default Connection / Use this connection string at runtime 进行发布，那么它似乎会将我的整个开发数据库复制到实时服务器，包括所有数据。绝对不是我需要的。

如果我使用 Settings / Databases / Entity Framework Migrations / ApplicationDbContext 进行发布，则会收到以下错误：

Configuring the following project for use with IIS: 'C:\Users\User\AppData\Local\Temp\PublishTemp\TestProject57'
Updating web.config at 'C:\Users\User\AppData\Local\Temp\PublishTemp\TestProject57\web.config'
Configuring project completed successfully
publish: Published to C:\Users\User\AppData\Local\Temp\PublishTemp\TestProject57
Published 1/1 projects successfully
Publishing with publish method [MSDeploy]
Executing command ["C:\Program Files (x86)\IIS\Microsoft Web Deploy V3\msdeploy.exe" -source:manifest='C:\Users\User\AppData\Local\Temp\PublishTemp\obj\SourceManifest.xml' -dest:manifest='C:\Users\User\AppData\Local\Temp\PublishTemp\obj\DestManifest.xml',ComputerName='https://xxx:8172/msdeploy.axd',UserName='xxx',Password='{PASSWORD-REMOVED-FROM-LOG}',IncludeAcls='False',AuthType='Basic' -verb:sync -enablerule:AppOffline -retryAttempts:20 -allowUntrusted]
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\DotNet\Microsoft.DotNet.Publishing.targets(406,5): Error : Error: (08/06/2016 08:29:36) An error occurred when the request was processed on the remote computer.
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\DotNet\Microsoft.DotNet.Publishing.targets(406,5): Error : Error: Could not find a part of the path 'C:\Users\User\AppData\Local\Temp\PublishTemp\obj\TestProject.Models.Database.ApplicationDbContext.sql'.
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\DotNet\Microsoft.DotNet.Publishing.targets(406,5): Error :    at Microsoft.Web.Deployment.NativeMethods.RaiseIOExceptionFromErrorCode(Win32ErrorCode errorCode, String maybeFullPath)
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\DotNet\Microsoft.DotNet.Publishing.targets(406,5): Error :    at Microsoft.Web.Deployment.FileStreamEx.CreateInstance(String path, FileMode fileMode, FileAccess fileAccess, FileShare fileShare, Nullable`1 fileLength)
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\DotNet\Microsoft.DotNet.Publishing.targets(406,5): Error :    at Microsoft.Web.Deployment.ReadWriteScriptFileProvider.GetFileStream()
Info: Using ID 'xxx' for connections to the remote server.
Info: Adding child sitemanifest (C:\Users\User\AppData\Local\Temp\PublishTemp\obj\TestProject.Models.Database.ApplicationDbContext.sql).
Info: Using ID 'xxx' for connections to the remote server.
Info: Updating file (TestProject\web.config).
Info: Updating file (TestProject\wwwroot\css\site.min.css).
Info: Adding child sitemanifest (C:\Users\User\AppData\Local\Temp\PublishTemp\obj\TestProject.Models.Database.ApplicationDbContext.sql).
Info: Adding database (sitemanifest/dbFullSql[@path='C:\Users\User\AppData\Local\Temp\PublishTemp\obj\TestProject.Models.Database.ApplicationDbContext.sql']/sqlScript)

C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\DotNet\Microsoft.DotNet.Publishing.targets(406,5): Error :    at Microsoft.Web.Deployment.ReadWriteScriptFileProvider.Add(DeploymentObject source, Boolean whatIf)
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\DotNet\Microsoft.DotNet.Publishing.targets(406,5): Error :    at Microsoft.Web.Deployment.DeploymentObject.AddChild(DeploymentObject source, Int32 position, DeploymentSyncContext syncContext)
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\DotNet\Microsoft.DotNet.Publishing.targets(406,5): Error :    at Microsoft.Web.Deployment.DeploymentSyncContext.HandleAddChild(DeploymentObject destParent, DeploymentObject sourceObject, Int32 position)
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\DotNet\Microsoft.DotNet.Publishing.targets(406,5): Error :    at Microsoft.Web.Deployment.DeploymentSyncContext.SyncChildrenOrder(DeploymentObject dest, DeploymentObject source)
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\DotNet\Microsoft.DotNet.Publishing.targets(406,5): Error :    at Microsoft.Web.Deployment.DeploymentSyncContext.HandleAddChild(DeploymentObject destParent, DeploymentObject sourceObject, Int32 position)
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\DotNet\Microsoft.DotNet.Publishing.targets(406,5): Error :    at Microsoft.Web.Deployment.DeploymentSyncContext.SyncChildrenOrder(DeploymentObject dest, DeploymentObject source)
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\DotNet\Microsoft.DotNet.Publishing.targets(406,5): Error :    at Microsoft.Web.Deployment.DeploymentSyncContext.ProcessSync(DeploymentObject destinationObject, DeploymentObject sourceObject)
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\DotNet\Microsoft.DotNet.Publishing.targets(406,5): Error :    at Microsoft.Web.Deployment.DeploymentObject.SyncToInternal(DeploymentObject destObject, DeploymentSyncOptions syncOptions, PayloadTable payloadTable, ContentRootTable contentRootTable, Nullable`1 syncPassId, String syncSessionId)
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\DotNet\Microsoft.DotNet.Publishing.targets(406,5): Error :    at Microsoft.Web.Deployment.DeploymentAgent.HandleSync(DeploymentAgentAsyncData asyncData, Nullable`1 passId, String user, String siteName)
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\DotNet\Microsoft.DotNet.Publishing.targets(406,5): Error : Error count: 1.

1>Publish failed due to build errors. Check the error list for more details.

如果我在发布对话框的 Preview 选项卡上单击 Entity Framework Migrations 下的 Preview Migration，则一切正常，复制生成的 SQL 迁移然后在服务器上手动运行它。此外，一旦正确应用了迁移，应用程序本身就会完美运行 - 故障点特别是发布过程尝试应用迁移时。

我的连接字符串也是相同的，因为开发和实时都有一个名称相同的数据库并使用集成安全性，在我手动运行迁移后站点可以正常工作，因此必须正确配置。

我真正想做的是在检查 Settings / Databases / Entity Framework Migrations / ApplicationDbContext 运行时找出错误的底部，因为我很确定这是我的选项想。该错误听起来像是试图在服务器上使用我的开发机器本地路径运行 SQL 文件，但我很难过。

Answer 1

这是使用 EF 迁移发布的 preview1 工具中的一个问题。这已修复 - https://github.com/aspnet/vsweb-publish/commit/b46d54f74d7298e65dde1622bda340af3b23713f

要解决此问题： 1. 将工具更新到 Preview2 版本。如果您已经拥有 publishprofile 和 ps1 文件，请删除 ps1 文件并发布。这将降低 ps1 的较新版本。 https://go.microsoft.com/fwlink/?LinkId=817245 2.复制这个文件的内容 https://raw.githubusercontent.com/aspnet/vsweb-publish/master/publish-module.psm1 到 C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\Extensions\Microsoft\Web Tools\Publish\Scripts\1.1.0\publish-module.psm1 （根据安装的工具，它将是 1.1.0 或 1.2.0。）。

这应该可以解决问题。 使用 EF 迁移将 ASP.NET 核心应用发布到应用服务的详细演练 https://dotnetpublish.wordpress.com/2016/07/05/publish-an-asp-net-core-web-app-with-ef-migrations-to-azure-appservice/