首先是ASP.NET核心代码，数据库初始化

Question

我有这个ASP.NET核心项目。

以及指向我的SQL数据库的连接字符串。

 "ConnectionStrings": {
    "DefaultConnection": "Data Source=localhost;Initial Catalog=RestaurantDatabase;Integrated Security=True;Trusted_Connection=True;MultipleActiveResultSets=true"}

我需要初始化数据库，从而运行迁移脚本。我曾尝试使用update-database，但这不起作用。 从代码初始化数据库的第一步是什么？

更新：

PM> dotnet ef migrations add InitialCreate
dotnet : No executable found matching command "dotnet-ef"
At line:1 char:1
+ dotnet ef migrations add InitialCreate
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (No executable f...and "dotnet-ef":String) [], RemoteException
    + FullyQualifiedErrorId : NativeCommandError

PM> Install-Package Microsoft.EntityFrameworkCore.Tools
  CACHE https://api.nuget.org/v3/registration3-gz-semver2/microsoft.entityframeworkcore.tools/index.json
Restoring packages for E:\xxxx\Restaurant-App\src\Server\Restaurant.Server.Api\Restaurant.Server.Api.csproj...
Install-Package : NU1605: Detected package downgrade: Microsoft.EntityFrameworkCore.Design from 2.0.2 to 2.0.1. Reference the package directly from the project to select a 
different version. 
 Restaurant.Server.Api -> Microsoft.EntityFrameworkCore.Tools 2.0.2 -> Microsoft.EntityFrameworkCore.Design (>= 2.0.2) 
 Restaurant.Server.Api -> Microsoft.EntityFrameworkCore.Design (>= 2.0.1)
At line:1 char:1
+ Install-Package Microsoft.EntityFrameworkCore.Tools
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Install-Package], Exception
    + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.InstallPackageCommand

Install-Package : Package restore failed. Rolling back package changes for 'Restaurant.Server.Api'.
At line:1 char:1
+ Install-Package Microsoft.EntityFrameworkCore.Tools
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Install-Package], Exception
    + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.InstallPackageCommand


PM> Add-Migration myMigration
Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager[0]
      User profile is available. Using 'C:\xxxx\AppData\Local\ASP.NET\DataProtection-Keys' as key repository and Windows DPAPI to encrypt keys at rest.
infoinfo: IdentityServer4.Startup[0]
      You are using the in-memory version of the persisted grant store. This will store consent decisions, authorization codes, refresh and reference tokens in memory only. If you are using any of those features in production, you want to switch to a different store implementation.
: IdentityServer4.Startup[0]
      You are using the in-memory version of the persisted grant store. This will store consent decisions, authorization codes, refresh and reference tokens in memory only. If you are using any of those features in production, you want to switch to a different store implementation.
dbug: IdentityServer4.Startup[0]
      Using Bearer as default scheme for authentication

Nuget包

有问题的脚本是这样的 - ＆gt; https://github.com/Jurabek/Restaurant-App

Answer 1

注意： 由DotNet命令行配置的Restaurant.Server.Api.csproj不是使用包管理器，也不需要创建初始迁移。

您需要转到src \ Server \ Restaurant.Server.Api＆gt;

使用命令行dotnet restore

运行该命令

和dotnet ef-database update

Answer 2

您必须首先通过在Visual Studio中的程序包管理器控制台中运行Add-Migration YourMigrarionName来生成迁移，然后运行Update-Database以在数据库上运行迁移。