无法在mac上使用dotnet ef核心支架

Question

我正尝试使用.net核心从我的MAC上的现有数据库中反向设计模型类。数据库运行在带有Windows的虚拟机上，我可以从osx连接到它。

在我project.json我有以下几点：

"dependencies": { 
    "Microsoft.NETCore.App": { 
     "version": "1.0.1", 
     "type": "platform" 
    }, 
    "Microsoft.AspNetCore.AngularServices": "1.0.0-*", 
    "Microsoft.AspNetCore.Diagnostics": "1.0.0", 
    "Microsoft.AspNetCore.Mvc": "1.0.1", 
    "Microsoft.AspNetCore.Razor.Tools": { 
     "version": "1.0.0-preview2-final", 
     "type": "build" 
    }, 
    "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0", 
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.1", 
    "Microsoft.AspNetCore.StaticFiles": "1.0.0", 
    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0", 
    "Microsoft.Extensions.Configuration.Json": "1.0.0", 
    "Microsoft.Extensions.Configuration.CommandLine": "1.0.0", 
    "Microsoft.Extensions.Logging": "1.0.0", 
    "Microsoft.Extensions.Logging.Console": "1.0.0", 
    "Microsoft.Extensions.Logging.Debug": "1.0.0", 
    "Microsoft.Extensions.Options.ConfigurationExtensions": "1.0.0", 

    "Microsoft.EntityFrameworkCore.Design": { 
     "type": "build", 
     "version": "1.0.0-preview2-final" 
    }, 
    "Microsoft.EntityFrameworkCore.SqlServer.Design": "1.0.0-rc2-final", 
    "Microsoft.EntityFrameworkCore.SqlServer": "1.0.0-rc2-final" 
    }, 

    "tools": { 
    "Microsoft.AspNetCore.Razor.Tools": "1.0.0-preview2-final", 
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final", 
    "Microsoft.DotNet.Watcher.Tools": "1.0.0-preview2-final", 
    "Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview2-final" 
    }, 

    "frameworks": { 
    "netcoreapp1.0": { 
     "imports": [ 
     "dotnet5.6", 
     "portable-net45+win8" 
     ] 
    } 
    }, 

    "buildOptions": { 
    "emitEntryPoint": true, 
    "preserveCompilationContext": true, 
    "compile": { 
     "exclude": ["node_modules"] 
    } 
    } 

但是当我运行

dotnet ef dbcontext scaffold "myDbConnectString" Microsoft.EntityFrameworkCore.SqlServer 

我碰到下面的错误，我无法获得通过该

An error occurred while calling method 'ConfigureDesignTimeServices' on startup class 

'Microsoft.EntityFrameworkCore.Scaffolding.SqlServerDesignTimeServices'. Consider using IDbContextFactory to override the initialization of the DbContext at design-time. Error: Could not load type 'Microsoft.Extensions.DependencyInjection.ServiceCollectionExtensions' from assembly 'Microsoft.Extensions.DependencyInjection.Abstractions, Version=1.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'. System.AggregateException: One or more errors occurred. (Unable to resolve service for type 'Microsoft.EntityFrameworkCore.Scaffolding.IScaffoldingModelFactory' while attempting to activate 'Microsoft.EntityFrameworkCore.Scaffolding.Internal.ReverseEngineeringGenerator'.) ---> System.InvalidOperationException: Unable to resolve service for type 'Microsoft.EntityFrameworkCore.Scaffolding.IScaffoldingModelFactory' while attempting to activate 'Microsoft.EntityFrameworkCore.Scaffolding.Internal.ReverseEngineeringGenerator'. at Microsoft.Extensions.DependencyInjection.ServiceLookup.Service.PopulateCallSites(ServiceProvider provider, ISet 1 callSiteChain, ParameterInfo[] parameters, Boolean throwIfCallSiteNotFound) at Microsoft.Extensions.DependencyInjection.ServiceLookup.Service.CreateCallSite(ServiceProvider provider, ISet 1 callSiteChain) at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetResolveCallSite(IService service, ISet 1 callSiteChain) at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetServiceCallSite(Type serviceType, ISet 1 callSiteChain) at Microsoft.Extensions.DependencyInjection.ServiceProvider.CreateServiceAccessor(Type serviceType, ServiceProvider serviceProvider) at System.Collections.Concurrent.ConcurrentDictionaryExtensions.GetOrAdd[TKey,TValue,TArg](ConcurrentDictionary 2 dictionary, TKey key, Func 3 valueFactory, TArg arg) at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType) at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType) at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider) at Microsoft.EntityFrameworkCore.Design.DatabaseOperations.ReverseEngineerAsync(String provider, String connectionString, String outputDir, String dbContextClassName, IEnumerable 1 schemas, IEnumerable 1 tables, Boolean useDataAnnotations, Boolean overwriteFiles, CancellationToken cancellationToken) at Microsoft.EntityFrameworkCore.Design.Internal.OperationExecutor.ReverseEngineerAsync(String provider, String connectionString, String outputDir, String dbContextClassName, IEnumerable 1 schemaFilters, IEnumerable 1 tableFilters, Boolean useDataAnnotations, Boolean overwriteFiles, CancellationToken cancellationToken) at Microsoft.EntityFrameworkCore.Tools.Cli.DbContextScaffoldCommand.d__1.MoveNext() --- End of inner exception stack trace --- at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions) at System.Threading.Tasks.Task 1.GetResultCore(Boolean waitCompletionNotification) at Microsoft.Extensions.CommandLineUtils.CommandLineApplication.Execute(String[] args) at Microsoft.EntityFrameworkCore.Tools.Cli.Program.Main(String[] args) ---> (Inner Exception #0) System.InvalidOperationException: Unable to resolve service for type 'Microsoft.EntityFrameworkCore.Scaffolding.IScaffoldingModelFactory' while attempting to activate 'Microsoft.EntityFrameworkCore.Scaffolding.Internal.ReverseEngineeringGenerator'. at Microsoft.Extensions.DependencyInjection.ServiceLookup.Service.PopulateCallSites(ServiceProvider provider, ISet 1 callSiteChain, ParameterInfo[] parameters, Boolean throwIfCallSiteNotFound) at Microsoft.Extensions.DependencyInjection.ServiceLookup.Service.CreateCallSite(ServiceProvider provider, ISet 1 callSiteChain) at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetResolveCallSite(IService service, ISet 1 callSiteChain) at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetServiceCallSite(Type serviceType, ISet 1 callSiteChain) at Microsoft.Extensions.DependencyInjection.ServiceProvider.CreateServiceAccessor(Type serviceType, ServiceProvider serviceProvider) at System.Collections.Concurrent.ConcurrentDictionaryExtensions.GetOrAdd[TKey,TValue,TArg](ConcurrentDictionary 2 dictionary, TKey key, Func 3 valueFactory, TArg arg) at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType) at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType) at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider) at Microsoft.EntityFrameworkCore.Design.DatabaseOperations.ReverseEngineerAsync(String provider, String connectionString, String outputDir, String dbContextClassName, IEnumerable 1 schemas, IEnumerable 1 tables, Boolean useDataAnnotations, Boolean overwriteFiles, CancellationToken cancellationToken) at Microsoft.EntityFrameworkCore.Design.Internal.OperationExecutor.ReverseEngineerAsync(String provider, String connectionString, String outputDir, String dbContextClassName, IEnumerable 1 schemaFilters, IEnumerable`1 tableFilters, Boolean useDataAnnotations, Boolean overwriteFiles, CancellationToken cancellationToken) at Microsoft.EntityFrameworkCore.Tools.Cli.DbContextScaffoldCommand.d__1.MoveNext()<--- One or more errors occurred. (Unable to resolve service for type 'Microsoft.EntityFrameworkCore.Scaffolding.IScaffoldingModelFactory' while attempting to activate 'Microsoft.EntityFrameworkCore.Scaffolding.Internal.ReverseEngineeringGenerator'.)

我试图改变我的依赖来回版本，但没有结果。任何人有任何指针？

Answer 1

刚刚上班。 我更新为.net core 1.1.0并修改了我的project.json以使用更新的版本。希望这可以帮助别人

project.json：

"dependencies": { 
    "Microsoft.NETCore.App": { 
    "version": "1.1.0", 
    "type": "platform" 
    }, 
    "Microsoft.AspNetCore.AngularServices": "1.0.0-*", 
    "Microsoft.AspNetCore.Diagnostics": "1.1.0", 
    "Microsoft.AspNetCore.Mvc": "1.1.0", 
    "Microsoft.AspNetCore.Razor.Tools": { 
    "version": "1.1.0-preview4-final", 
    "type": "build" 
    }, 
    "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.Json": "1.1.0", 
    "Microsoft.Extensions.Configuration.CommandLine": "1.1.0", 
    "Microsoft.Extensions.Logging": "1.1.0", 
    "Microsoft.Extensions.Logging.Console": "1.1.0", 
    "Microsoft.Extensions.Logging.Debug": "1.1.0", 
    "Microsoft.Extensions.Options.ConfigurationExtensions": "1.1.0", 

    "Microsoft.EntityFrameworkCore.Design": { 
    "type": "build", 
    "version": "1.1.0" 
    }, 
    "Microsoft.EntityFrameworkCore.SqlServer.Design": "1.1.0", 
    "Microsoft.EntityFrameworkCore.SqlServer": "1.1.0" 
}, 

"tools": { 
    "Microsoft.AspNetCore.Razor.Tools": "1.1.0-preview4-final", 
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.1.0-preview4-final", 
    "Microsoft.DotNet.Watcher.Tools": "1.1.0-preview4-final", 
    "Microsoft.EntityFrameworkCore.Tools.DotNet": "1.1.0-preview4-final" 
} 

Answer 2

您是否尝试过使用实体框架的RTM版本？

{ 
    "Microsoft.EntityFrameworkCore.SqlServer.Design": "1.0.1", 
    "Microsoft.EntityFrameworkCore.SqlServer": "1.0.1" 
}