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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
我使用下面的命令來創建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創建了dbcontext。
現在,我已經更改了一些表的列並使用下面的命令進行更新
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
上面的命令給了我一個錯誤
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碼完成的進程
我做了很多研究。 無法解決這個問題。我正在使用asp.net核心1.1
這是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%" ]
}
}
您正在使用代碼優先方法,並且在此方法中將流程從代碼更改為數據庫。 實體框架工作為我們提供了從逆向工程從現有數據庫開始的選項。 當我們做過一次逆向工程來生成我們的模型之后,我們需要遵循遷移流程,將代碼中的第一個方法代碼轉換為數據庫。
使用此命令,我們可以生成遷移
dotnet ef migrations add InitialCreate -c SchoolContext
並將此應用於數據庫。
dotnet ef database update -c SchoolContext
您可以在此處了解更多相關信息
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