[英]How do I Enable Migrations in the Package Manager Console?
I'm trying to enable migrations in MVC4, Entity Framework 5.00, however when I input the command it throws the following error: 我试图在MVC4,实体框架5.00中启用迁移,但是当我输入命令时,它会引发以下错误:
Cannot determine a valid start-up project. Using project 'EFMigrations' instead. Your configuration file and working directory may not be set as expected. Use the -StartUpProjectName parameter to set one explicitly. Use the -Verbose switch for more information.
Exception calling "LoadFrom" with "1" argument(s): "Could not load file or assembly 'file://\\s01\data\Documents\Visual Studio 2010\Projects\EFMigrations\packages\EntityFramework.5.0.0\tool
s\EntityFramework.PowerShell.Utility.dll' or one of its dependencies. Operation is not supported. (Exception from HRESULT: 0x80131515)"
At \\s01\data\Documents\Visual Studio 2010\Projects\EFMigrations\packages\EntityFramework.6.0.0-beta1\tools\EntityFramework.psm1:669 char:62
+ $utilityAssembly = [System.Reflection.Assembly]::LoadFrom <<<< ((Join-Path $ToolsPath EntityFramework.PowerShell.Utility.dll))
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : DotNetMethodException
You cannot call a method on a null-valued expression.
At \\s01\data\Documents\Visual Studio 2010\Projects\EFMigrations\packages\EntityFramework.6.0.0-beta1\tools\EntityFramework.psm1:670 char:50
+ $dispatcher = $utilityAssembly.CreateInstance <<<< (
+ CategoryInfo : InvalidOperation: (CreateInstance:String) [], RuntimeException
+ FullyQualifiedErrorId : InvokeMethodOnNull
Exception calling "CreateInstanceFrom" with "8" argument(s): "Could not load file or assembly 'file://\\s01\data\Documents\Visual Studio 2010\Projects\EFMigrations\packages\EntityFramework.
5.0.0\tools\EntityFramework.PowerShell.dll' or one of its dependencies. Operation is not supported. (Exception from HRESULT: 0x80131515)"
At \\s01\data\Documents\Visual Studio 2010\Projects\EFMigrations\packages\EntityFramework.6.0.0-beta1\tools\EntityFramework.psm1:698 char:31
+ $domain.CreateInstanceFrom <<<< (
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : DotNetMethodException
any and all help would be appreciated. 任何帮助都将不胜感激。
Running migrations from a network path is unsupported. 不支持从网络路径运行迁移。
EF Team Triage: The migrations commands require full trust to run. EF团队分类:迁移命令需要完全信任才能运行。 Because you are running from a network share it looks like you are running in a lower trust level. 因为您是从网络共享运行的,所以看起来您正在以较低的信任级别运行。 In the past we have made the decision that the migrations commands would require full trust because it reduces the complexity of the implementation. 过去,我们决定迁移命令将需要完全信任,因为它降低了实现的复杂性。
http://entityframework.codeplex.com/workitem/856 http://entityframework.codeplex.com/workitem/856
This means you have to put your project on a local drive, then you'll be able to run migrations. 这意味着您必须将项目放在本地驱动器上,然后才能运行迁移。
事实证明@Stijn的答案的确正确,但是并不能解决问题,解决方案是简单地将整个项目复制并粘贴到硬盘中,命令将起作用
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