我试图使用命令dotnet ef migrations script
来创建用于上次应用迁移和上次未应用迁移之间的SQL脚本。应用迁移是一个被称为dotnet ef database update
使用ASP.NET Core工具创建迁移脚本时未找到迁移到/ from找不到
我尝试执行下面的命令,没有他们的工作:
dotnet ef --startup-project ../DbMigrations/ migrations script from LastAppliedMigration to LastNotAppliedMigration -o temp.sql --context MyProject.DbModel.MusicDbContext
dotnet ef --startup-project ../DbMigrations/ migrations script from LastAppliedMigration -o temp.sql --context MyProject.DbModel.MusicDbContext
我得到以下错误:System.InvalidOperationException:“从”被迁移未找到。
System.InvalidOperationException: The migration 'from' was not found.
at Microsoft.EntityFrameworkCore.Migrations.MigrationsAssemblyExtensions.GetMigrationId(IMigrationsAssembly assembly, String nameOrId)
at Microsoft.EntityFrameworkCore.Migrations.Internal.Migrator.GenerateScript(String fromMigration, String toMigration, Boolean idempotent)
at Microsoft.EntityFrameworkCore.Design.MigrationsOperations.ScriptMigration(String fromMigration, String toMigration, Boolean idempotent, String contextType)
at Microsoft.EntityFrameworkCore.Tools.Cli.MigrationsScriptCommand.Execute(CommonOptions commonOptions, String from, String to, String output, Boolean idempotent, String context, String environment)
at Microsoft.EntityFrameworkCore.Tools.Cli.MigrationsScriptCommand.<>c__DisplayClass0_0.<Configure>b__0()
at Microsoft.Extensions.CommandLineUtils.CommandLineApplication.Execute(String[] args)
at Microsoft.EntityFrameworkCore.Tools.Cli.Program.Main(String[] args)
对于迁移的名字我想这两个版本的前缀时间戳和无:
- 20160920085915_LastAppliedMigration
- LastAppliedMigration
难道我正确地使用这个命令dotnet ef migrations script
?
编辑1
我做了一个简单的例子来证明,我有这个问题。这个例子可以从这里Download example
下载我做了什么:
- 创建一个默认的Web应用程序项目
dotnet ef migrations add Initial
dotnet ef migrations script -o initial.sql
- 在initial.sql文件创建dotnet ef database update
- 已添加
Student
类Data
- 新增``DbSet
in
ApplicationDbContext``` dotnet ef migrations add Student
dotnet ef migrations script from 20160924174811_Initial -o student.sql
在这里,我得到以下错误 - '从' 未找到迁移。
Project WebApplication3 (.NETCoreApp,Version=v1.0) was previously compiled. Skipping compilation.
System.InvalidOperationException: The migration 'from' was not found.
at Microsoft.EntityFrameworkCore.Migrations.MigrationsAssemblyExtensions.GetMigrationId(IMigrationsAssembly assembly, String nameOrId)
at Microsoft.EntityFrameworkCore.Migrations.Internal.Migrator.GenerateScript(String fromMigration, String to Migration, Boolean idempotent)
at Microsoft.EntityFrameworkCore.Design.MigrationsOperations.ScriptMigration(String fromMigration, String to Migration, Boolean idempotent, String contextType)
at Microsoft.EntityFrameworkCore.Tools.Cli.MigrationsScriptCommand.Execute(CommonOptions commonOptions, String from, String to, String output, Boolean idempotent, String context, String environment)
at Microsoft.EntityFrameworkCore.Tools.Cli.MigrationsScriptCommand.<>c__DisplayClass0_0.<Configure>b__0()
at Microsoft.Extensions.CommandLineUtils.CommandLineApplication.Execute(String[] args)
at Microsoft.EntityFrameworkCore.Tools.Cli.Program.Main(String[] args)
The migration 'from' was not found.
当我做dotnet ef migrations list
我得到以下结果:
Project WebApplication3 (.NETCoreApp,Version=v1.0) was previously compiled. Skipping compilation.
20160924174811_Initial
20160924175511_Student
的CLI工具的版本是
dotnet --version
1.0.0-preview2-003131
第二个版本应该工作。你使用什么版本的CLI工具? –
迈克迈克,我已经添加了编辑1与演示应用程序展示我的问题。我正在尝试从20160924174811_Initial -o student.sql'''制作'''dotnet ef migrations脚本,并且它不能与错误一起工作:找不到'from'的迁移。你可以下载附加的项目并看看。任何帮助将非常感激。谢谢! – feradz