Question

将dotnet core 2.1应用升级到dotnet core 3.1后，我无法创建新的迁移。这是我的配置：

我的启动看起来像：

public void ConfigureServices(IServiceCollection services) {
    services.AddOptions();

    services.AddDbContext<DataContext>(options => {
        var connectionString = Configuration.GetConnectionString("DefaultConnection");
        options.UseNpgsql(connectionString);
    });
    // other configurations
}

public void ConfigureContainer(ContainerBuilder builder) {
    // register my services in autofac
}

public void Configure(IApplicationBuilder app, IHostingEnvironment env){
    // configure stuff 
}

和程序：

public static IHostBuilder CreateHostBuilder(string[] args)
    => Host.CreateDefaultBuilder(args)
       .UseServiceProviderFactory(new AutofacServiceProviderFactory())
       .ConfigureWebHostDefaults(webBuilder => { webBuilder.UseStartup<Startup>(); });

这是我的DbContext：

public class DataContext : DbContext  {

    public DataContext(DbContextOptions<DataContext> options):base(options) {}
}

现在，当我运行此命令时：

dotnet ef migrations add Initial

我收到此错误：

在激活特定注册期间发生错误。有关详细信息，请参见内部异常。注册：激活器= DbContextOptions []（DelegateActivator），服务= [System.Collections.Generic.IEnumerable 1[[Microsoft.EntityFrameworkCore.DbContextOptions, Microsoft.EntityFrameworkCore, Version=3.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60]]], Lifetime = Autofac.Core.Lifetime.CurrentScopeLifetime, Sharing = None, Ownership = ExternallyOwned ---> An error occurred during the activation of a particular registration. See the inner exception for details. Registration: Activator = DbContextOptions (DelegateActivator), Services = [Microsoft.EntityFrameworkCore.DbContextOptions], Lifetime = Autofac.Core.Lifetime.CurrentScopeLifetime, Sharing = Shared, Ownership = OwnedByLifetimeScope ---> An error occurred during the activation of a particular registration. See the inner exception for details. Registration: Activator = DbContextOptions 1 （DelegateActivator），服务= [Microsoft.EntityFrameworkCore.DbContextOptions`1 [[Manex.Micro.Auth.Data.DataContext， Manex.Micro.Auth，版本= 1.0.0.0，文化=中性， PublicKeyToken = null]]]，生命周期= Autofac.Core.Lifetime.CurrentScopeLifetime，共享=共享，所有权= OwnedByLifetimeScope --->类型中的方法'get_Info' 'Microsoft.EntityFrameworkCore.Infrastructure.Internal.NpgsqlOptionsExtension' 来自程序集'Npgsql.EntityFrameworkCore.PostgreSQL，Version = 1.1.0.0，文化=中性，PublicKeyToken = 5d8b90d52f46fda7'没有实施。（有关详细信息，请参阅内部异常。）（请参阅内部有关详细信息，请参见异常。）（有关详细信息，请参阅内部异常。）

我从程序集'Npgsql.EntityFrameworkCore.PostgreSQL 中搜索了类型为'Microsoft.EntityFrameworkCore.Infrastructure.Internal.NpgsqlOptionsExtension'的方法'get_Info'，但是没有任何结果。你知道我在做什么错吗？

这是我的书库堆栈：C#，ASP.NET Core 3.1，.NET Core 3.1，NPGSQL，Autofac。

更新：

我删除了Autofac，并将DbContext更改为带有一个简单实体的简单上下文。现在，我得到的唯一错误是：

方法“ get_Info”的类型 'Microsoft.EntityFrameworkCore.Infrastructure.Internal.NpgsqlOptionsExtension' 来自程序集'Npgsql.EntityFrameworkCore.PostgreSQL，Version = 1.1.0.0，文化=中性，PublicKeyToken = 5d8b90d52f46fda7'没有实施。

升级到dotnet core 3.1后迁移失败

0 个答案: