Question

我正在使用Service Fabric和Entity Framework 6.1.3。当我尝试使用“启用 - 迁移”启用迁移时出现错误：

Exception calling "SetData" with "2" argument(s): "Type 'Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.Automation.OAProject' in assembly 
'Microsoft.VisualStudio.ProjectSystem.VS.Implementation, Version=14.1.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' is not marked as serializable."
At C:\repos\Gsa.Pops.Bookings\packages\EntityFramework.6.1.3\tools\EntityFramework.psm1:720 char:5
+     $domain.SetData('startUpProject', $startUpProject)
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : SerializationException

System.NullReferenceException: Object reference not set to an instance of an object.
   at System.Data.Entity.Migrations.Extensions.ProjectExtensions.GetProjectTypes(Project project, Int32 shellVersion)
   at System.Data.Entity.Migrations.Extensions.ProjectExtensions.IsWebProject(Project project)
   at System.Data.Entity.Migrations.MigrationsDomainCommand.GetFacade(String configurationTypeName, Boolean useContextWorkingDirectory)
   at System.Data.Entity.Migrations.EnableMigrationsCommand.FindContextToEnable(String contextTypeName)
   at System.Data.Entity.Migrations.EnableMigrationsCommand.<>c__DisplayClass2.<.ctor>b__0()
   at System.Data.Entity.Migrations.MigrationsDomainCommand.Execute(Action command)
Object reference not set to an instance of an object.

我认为EF无法找到连接字符串，因为启动项目是Service Fabric应用程序（因此没有web.config，而是ApplicationManifest.xml和多个环境配置）

有任何线索吗？谢谢，阿尔贝托

Answer 1

您可以将连接字符串存储在Azure中的KeyVault中，然后从那里获取基础结构项目。

Answer 2

请使用以下命令启用迁移，启用 - 迁移-EnableAutomaticMigrations -ProjectName＆lt;迁移文件夹将包含的项目名称＆gt; -StartUpProjectName＆lt;连接字符串存在的项目名称＆gt;

服务结构和实体框架迁移

2 个答案: