PM>Add-Migrationinit-c ProjectLogsContext To undothisaction,use Remove-Migration.#这句话就是说已经成功创建了迁移 3、将迁移信息生成到数据库 dotnet ef database update #使用命令dotnet ef database update 这个init是要生成的迁移的目录 后面-c 带的是你自己写的entity信息的类名 PM> dotnet ef database...
以前使用db.Database.EnsureCreatedAsync()创建数据库,这样创建的数据库无法更新,无法迁移,当数据库作出修改后就会因为兼容旧版而束手无策,只能重新录入数据。基于这种需求,研究了EF提供的Migrations功能。 vs版本:2015,.NetCore版本:1.0.1。 新建项目ConsoleApp1。 想要使用Migrations,需先安装EF命令行工具:Microsoft....
EntityFrameworkCore\Add-Migration InitialCreate EntityFrameworkCore\Update-Database 参考地址:https://docs.microsoft.com/zh-cn/ef/core/managing-schemas/migrations/?tabs=vs
The content has been generated but the database has not yet been initialized. To prep the database, we need to create a migration and then update the database. Do that with the following commands. dotnet ef migrations add initialMigration This will add a new migration named initialMigration....
dotnet efonly works in .NET Core projects. If your project targets the full .NET framework, then you’ll need to use the PowerShell commands e.g. add-migration, update-database. Make sure that you are running the command from the folder that contains the project where the Tools package ...
same problem when removing previous migration (while having pending changes of course) update-database -project $DalProject -StartupProject $WebProject -context $DbContext -v $PreviousMigration I used to have this error in previous version in specific cases but I'm not sure which. ...
如果源代码生成是人类可见的代码，我期望生成的代码最好是比较符合人类编写代码的规范。为了能让人类在阅读机器生成的代码的时候，不会想着拿刀砍那个编写代码生成代码的开发者，最好，或者说至少代码也应该有个缩进和换行吧。本文将安利大家通过 IndentedTextWriter 这个辅助类，用来辅助生成带缩进的内容 ...
Current situation Scaffolded migrations target a specific database provider. This means that it is not in general possible to scaffold a migration against one provider and then use it with another provider. However, we try to keep the mi...
前面提到可以将Migration生成为SQL脚本,自然可直接把生成好的SQL拿到库里去执行更新。 通过Migration命令更新 # ef命令同时也提供了更新数据库的命令,可通过如下命令查看具体如何使用 dotnet ef database -h #将migration更新到最新 dotnet ef database update 注意:该命令需要在Migration工程的源文件目录下才能执行,...
开发工具及版本:Visual Studio 2015 Update 1 .NET Framework版本:.NET Framework 4.6 程序输出方式:控制台应用程序 第一步、创建项目并引用程序包 1.1 创建项目 首先,我们创建一个控制台应用程序,取名为:EFRemoveManyToManyDemo,如下图: 1.2 引用程序包