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[英]How to update dbcontext scaffolding in ASP.NET 5 with EF Core?
[英]How to update the existing dbcontext in asp.net core 1.1
我使用下面的命令来创建dbcontext
Scaffold-DbContext "Data Source=SANPC;Initial Catalog=EMAKITI;Trusted_Connection=True;" Microsoft.EntityFrameworkCore.SqlServer -OutputDir Data
上面的命令使用所有表成功创建了dbcontext。
现在,我已经更改了一些表的列并使用下面的命令进行更新
Scaffold-DbContext -Connection "Data Source=SANPC;Initial Catalog=EMAKITI;Integrated Security=True;Trusted_Connection=True;" -Provider Microsoft.EntityFrameworkCore.SqlServer -OutputDir Entity -context EmakitiContext -Project DataBase -force
上面的命令给了我一个错误
指定的deps.json [D:\\ GitAlpha \\ eMikitiWebApi \\ eMikitiWebApiPortal \\ src \\ eMikitiWebApiPortal \\ bin \\ Debug \\ netcoreapp1.1 \\ eMikitiWebApiPortal.deps.json]不存在使用非零退出代码完成的进程
我做了很多研究。 无法解决这个问题。我正在使用asp.net核心1.1
这是project.json文件
{
"dependencies": {
"Microsoft.Extensions.Logging": "1.1.0",
"Microsoft.EntityFrameworkCore.SqlServer": "1.1.0",
"Microsoft.EntityFrameworkCore.Tools": "1.1.0-preview4-final",
"Microsoft.EntityFrameworkCore.Design": "1.1.0",
"Microsoft.EntityFrameworkCore.SqlServer.Design": "1.1.0",
"DataBase": "1.0.0-*",
"UnitOfWork": "1.0.0-*",
"ViewModel": "1.0.0-*",
"Common": "1.0.0-*",
"Microsoft.AspNetCore.Session": "1.1.0",
"Microsoft.Extensions.Caching.Memory": "1.1.0",
"Microsoft.Extensions.Options.ConfigurationExtensions": "1.1.0",
"Microsoft.NETCore.App": "1.1.0",
"System.IdentityModel.Tokens.Jwt": "5.1.2",
"Microsoft.AspNetCore.Authentication.JwtBearer": "1.1.0",
"Microsoft.AspNetCore.Diagnostics": "1.1.0",
"Microsoft.AspNetCore.Mvc": "1.1.0",
"Microsoft.AspNetCore.Routing": "1.1.0",
"Microsoft.AspNetCore.Server.IISIntegration": "1.1.0",
"Microsoft.AspNetCore.Server.Kestrel": "1.1.0",
"Microsoft.AspNetCore.StaticFiles": "1.1.0",
"Microsoft.Extensions.Configuration.EnvironmentVariables": "1.1.0",
"Microsoft.Extensions.Configuration.FileExtensions": "1.1.0",
"Microsoft.Extensions.Configuration.Json": "1.1.0",
"Microsoft.Extensions.Logging.Console": "1.1.0",
"Microsoft.Extensions.Logging.Debug": "1.1.0",
"Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore": "1.1.0"
},
"tools": {
"Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final",
"Microsoft.EntityFrameworkCore.Tools.DotNet": "1.0.0-preview3-final",
"Microsoft.AspNetCore.Razor.Tools": "1.0.0-preview2-final"
},
"frameworks": {
"netcoreapp1.1": {
"imports": [
"dotnet5.6",
"portable-net45+win8"
]
}
},
"runtimes": {
"win10-x64": {}
},
"buildOptions": {
"emitEntryPoint": true,
"preserveCompilationContext": true
},
"runtimeOptions": {
"configProperties": {
"System.GC.Server": true
}
},
"publishOptions": {
"include": [
"wwwroot",
"**/*.cshtml",
"appsettings.json",
"web.config"
]
},
"scripts": {
"postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
}
}
您正在使用代码优先方法,并且在此方法中将流程从代码更改为数据库。 实体框架工作为我们提供了从逆向工程从现有数据库开始的选项。 当我们做过一次逆向工程来生成我们的模型之后,我们需要遵循迁移流程,将代码中的第一个方法代码转换为数据库。
使用此命令,我们可以生成迁移
dotnet ef migrations add InitialCreate -c SchoolContext
并将此应用于数据库。
dotnet ef database update -c SchoolContext
您可以在此处了解更多相关信息
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