在Code First add-migration期间发生错误 [英] Errors during Code First add-migration

问题描述

我们的添加迁移是常规的，但不一致的。迁移总是进入脚手架步骤，然后大约4次5次，我们将收到以下内容：

 系统。 Runtime.Remoting.RemotingException：Object'/2355037d_df43_460b_8737_725c0c1c80be/hvdculybngjc_rcnskixmk7+_2.rem'已断开连接或不存在于server.at EnvDTE.Project.get_Properties（）
在System.Data.Entity.Migrations.Extensions .ProjectExtensions.GetPropertyValue [T]（项目项目，String propertyName）
在System.Data.Entity.Migrations.Extensions.ProjectExtensions.AddFile（项目项目，字符串路径，字符串内容）
在System.Data .Entity.Migrations.Utilities.MigrationWriter.Write（ScaffoldedMigration scaffoldedMigration，Boolean rescaffolding，Boolean force，String name）
在System.Data.Entity.Migrations.AddMigrationCommand。  c__DisplayClass3。< .ctor> b__1 （）
在System.Data.Entity.Migrations.MigrationsDomainCommand.Execute（Action命令）
对象'/ 2355037 d_df43_460b_8737_725c0c1c80be / hvdculybngjc_rcnskixmk7 + _2.rem'已断开或不存在于服务器。 
  

有时，迁移类生成，但更常见的是不会生成。对这个错误的搜索表明，垃圾收集是不应该的，但这并不能帮助我们解决这个问题。

我们的数据迁移项目在.NET 4.5中，EF 5在Windows 8，Visual Studio 2012和SQL Server 2012中工作。

解决方案

我在一些长期运行的脚本生成新的索引。我们使用的解决方法是使用：

  update-database -Script 
  / pre> 
 
 
 EF然后将SQL迁移到屏幕，然后我们可以直接从服务器运行SQL，因此没有超时问题。
 
Our add-migrations are failing routinely but not consistently. The migration always gets to the scaffolding step and then roughly 4 out of 5 times we will receive something like the following:
 System.Runtime.Remoting.RemotingException: Object '/2355037d_df43_460b_8737_725c0c1c80be/hvdculybngjc_rcnskixmk7+_2.rem' has been disconnected or does not exist at the server.at EnvDTE.Project.get_Properties()
 at System.Data.Entity.Migrations.Extensions.ProjectExtensions.GetPropertyValue[T]  (Project project, String propertyName)
 at System.Data.Entity.Migrations.Extensions.ProjectExtensions.AddFile(Project project, String path, String contents)
 at System.Data.Entity.Migrations.Utilities.MigrationWriter.Write(ScaffoldedMigration scaffoldedMigration, Boolean rescaffolding, Boolean force, String name)
 at System.Data.Entity.Migrations.AddMigrationCommand.<>c__DisplayClass3.<.ctor>b__1()
 at System.Data.Entity.Migrations.MigrationsDomainCommand.Execute(Action command)
Object '/2355037d_df43_460b_8737_725c0c1c80be/hvdculybngjc_rcnskixmk7+_2.rem' has been  disconnected or does not exist at the server.
Sometimes the migration class gets generated anyway but more often it does not. Searches on this error have indicated that something is being garbage collected that isn't supposed to be but that doesn't really help us work around the issue.

Our data migration project is in .NET 4.5 with EF 5 working in Windows 8, Visual Studio 2012 and SQL Server 2012.
解决方案
This happened to me on some long running scripts that generated new indexes.  The workaround that we used was to use:
update-database -Script
EF then spits out the SQL migration to the screen and then we could run the SQL directly from the server so there were no timeout problems.

                        
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