我正在使用 Entity Framework Core 5 和 Postgres 建立一个新项目。我的所有项目和我的上下文都在同一个项目中。
添加迁移时,出现此错误:
/src/Api.csproj : error MSB4057: The target "GetEFProjectMetadata" does not exist in the project. Unable to retrieve project metadata. Ensure it's an MSBuild-based .NET Core project. If you're using custom BaseIntermediateOutputPath or MSBuildProjectExtensionsPath values, Use the --msbuildprojectextensionspath option.
EF 核心版本:5.0.1 目标框架:net5.0
这些是我尝试过的所有命令:
dotnet ef migrations add NewMigration
dotnet ef migrations add NewMigration --msbuildprojectextensionspath
dotnet ef migrations add NewMigration -p ".\src\Api.csproj"
dotnet ef migrations add NewMigration -p ".\src\Api.csproj" --msbuildprojectextensionspath*
我尝试了很多在互联网上找到的选项,但都没有用。
如果我添加 -v ,最后一行是:
Using project '/media/pablo/l/Projetos/Web/backend/boilerplate/dotnet_csharp/src/Api.csproj'.
Using startup project '/media/pablo/l/Projetos/Web/backend/boilerplate/dotnet_csharp/src/Api.csproj'.
Writing '/media/pablo/l/Projetos/Web/backend/boilerplate/dotnet_csharp/src/obj/Api.csproj.EntityFrameworkCore.targets'...
dotnet msbuild /target:GetEFProjectMetadata /property:EFProjectMetadataFile=/tmp/tmpbscOwZ.tmp /verbosity:quiet /nologo /media/pablo/l/Projetos/Web/backend/boilerplate/dotnet_csharp/src/Api.csproj
/media/pablo/l/Projetos/Web/backend/boilerplate/dotnet_csharp/src/Api.csproj : error MSB4057: O destino "GetEFProjectMetadata" não existe no projeto.
Microsoft.EntityFrameworkCore.Tools.CommandException: Unable to retrieve project metadata. Ensure it's an SDK-style project. If you're using a custom BaseIntermediateOutputPath or MSBuildProjectExtensionsPath values, Use the --msbuildprojectextensionspath option.
at Microsoft.EntityFrameworkCore.Tools.Project.FromFile(String file, String buildExtensionsDir, String framework, String configuration, String runtime)
at Microsoft.EntityFrameworkCore.Tools.RootCommand.Execute(String[] _)
at Microsoft.EntityFrameworkCore.Tools.Commands.CommandBase.<>c__DisplayClass0_0.<Configure>b__0(String[] args)
at Microsoft.DotNet.Cli.CommandLine.CommandLineApplication.Execute(String[] args)
at Microsoft.EntityFrameworkCore.Tools.Program.Main(String[] args)
Unable to retrieve project metadata. Ensure it's an SDK-style project. If you're using a custom BaseIntermediateOutputPath or MSBuildProjectExtensionsPath values, Use the --msbuildprojectextensionspath option.
API.csproj:
<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<TargetFramework>net5.0</TargetFramework>
<DocumentationFile>bin\Debug\net5.0\comments.xml</DocumentationFile>
<GenerateRuntimeConfigurationFiles>true</GenerateRuntimeConfigurationFiles>
<noWarn>1591;1572;1573</noWarn>
<PublishWithAspNetCoreTargetManifest>false</PublishWithAspNetCoreTargetManifest>
<CodeAnalysisRuleSet>../roslynator.ruleset</CodeAnalysisRuleSet>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="FluentValidation" Version="9.4.0" />
<PackageReference Include="FluentValidation.AspNetCore" Version="9.4.0" />
<PackageReference Include="Mapster" Version="7.0.1" />
<PackageReference Include="Swashbuckle.AspNetCore" Version="5.5.1" />
<PackageReference Include="Scrutor" Version="3.3.0" />
<PackageReference Include="Microsoft.EntityFrameworkCore" Version="5.0.1" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="5.0.1" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="5.0.1" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="5.0.1" />
<PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="5.0.1" />
<PackageReference Include="jaeger" Version="0.4.2" />
<PackageReference Include="OpenTracing.Contrib.NetCore" Version="0.7.1" />
<PackageReference Include="RestSharp" Version="106.2.1" />
<PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="5.0.1" />
<PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="5.0.1" />
<PackageReference Include="Microsoft.AspNet.WebApi.Client" Version="5.2.7" />
<PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="5.0.1" />
<PackageReference Include="Microsoft.Extensions.Hosting" Version="5.0.0" />
<PackageReference Include="Microsoft.OpenApi" Version="1.2.3" />
<PackageReference Include="Swashbuckle.AspNetCore.Newtonsoft" Version="5.6.3" />
</ItemGroup>
<ItemGroup>
<None Include="*.json" CopyToPublishDirectory="Always" CopyToOutputDirectory="Always" />
<None Include="Locales\**\*.json" CopyToPublishDirectory="Always" CopyToOutputDirectory="Always" />
</ItemGroup>
</Project>
程序.cs:
using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Hosting;
namespace Linear.Service_Name.Api
{
public static class Program
{
public static void Main(string[] args)
{
CreateWebHostBuilder(args).Build().Run();
}
public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
WebHost.CreateDefaultBuilder(args).UseStartup<Startup>();
}
}
启动.cs:
using Linear.Service_Name.DataBase.Entities;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using System.Reflection;
[assembly: Microsoft.AspNetCore.Mvc.ApiController]
namespace Linear.Service_Name.Api
{
public class Startup
{
private IWebHostEnvironment _environment { get; }
public Startup(IConfiguration _, IWebHostEnvironment environment)
{
_environment = environment;
}
public void ConfigureServices(IServiceCollection services)
{
services.AddDbContext<Context>(opt => opt
.UseNpgsql(EnvVariables.LINEAR_API_DOMAIN_NAME_DB_CONNECTION_STRING)
);
services.AddCommonsServices<Context>(new CommonServices
{
Env = _environment,
ConnectionString = EnvVariables.LINEAR_API_DOMAIN_NAME_DB_CONNECTION_STRING,
Assembly = Assembly.GetExecutingAssembly(),
Swagger = new CommonServices.SwaggerSettings{
Version = "v1",
Title = "Service_Name",
Description = "API REST do Módulo de " + ("Service_Name").ToUpper()
+ " da solução SG Web."
}
});
}
public void Configure(IApplicationBuilder app)
{
app.UserCommonsMiddlewares(new CommonMiddlewares
{
Env = _environment,
PathBase = EnvVariables.LINEAR_API_SERVICE_NAME_BASE_PATH,
Swagger = new CommonMiddlewares.SwaggerSettings
{
Version = "v1",
Title = "Service_Name"
}
});
}
}
}
上下文.cs:
using Linear.Infrastructure.Data.Audit;
using Linear.Infrastructure.Data.MultiTenancy;
using Microsoft.EntityFrameworkCore;
namespace Linear.Service_Name.DataBase.Entities
{
public class Context : DbContext
{
public virtual DbSet<Sample_NamesEntity> Sample_Names { get; set; }
private readonly IAuditEntity _auditEntity;
private readonly IMultiTenancy _multiTenancy;
public Context(DbContextOptions<Context> options, IAuditEntity auditEntity,
IMultiTenancy multiTenancy)
: base(options)
{
_auditEntity = auditEntity;
_multiTenancy = multiTenancy;
}
#region Métodos Protegidos
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
}
protected override void OnModelCreating(ModelBuilder modelBuilder)
=> modelBuilder.ApplyConfigurationsFromAssembly(typeof(Context).Assembly);
#endregion
#region Métodos Públicos
public override int SaveChanges()
{
_multiTenancy.OnSaveChanges(this);
_auditEntity.OnSaveChanges(this);
return base.SaveChanges();
}
public int SaveChangesWithoutMultiTenancy()
{
_auditEntity.OnSaveChanges(this);
return base.SaveChanges();
}
public int SaveChangesWithoutMultiTenancyAndAudit() => base.SaveChanges();
#endregion
}
}
项目下载链接: https://drive.google.com/file/d/1YWlm_teyGMjJe193AwrFqe3VAeVVKWLq/view?usp=sharing
我已经被这个问题困扰了 3 个多小时,在网上尝试了很多建议,但仍然没有成功,如果我能得到一些帮助,我将不胜感激。
最佳答案
经过一些研究,docker 集成和 EF Core 工具的项目似乎存在问题。
我已经下载了你的代码,这是你的Directory.Build.props
<Project>
<PropertyGroup>
<DefaultItemExcludes>$(DefaultItemExcludes);$(MSBuildProjectDirectory)/obj/**/*</DefaultItemExcludes>
<DefaultItemExcludes>$(DefaultItemExcludes);$(MSBuildProjectDirectory)/bin/**/*</DefaultItemExcludes>
</PropertyGroup>
<PropertyGroup Condition="'$(DOTNET_RUNNING_IN_CONTAINER)' == 'true'">
<BaseIntermediateOutputPath>$(MSBuildProjectDirectory)/obj/container/</BaseIntermediateOutputPath>
<BaseOutputPath>$(MSBuildProjectDirectory)/bin/container/</BaseOutputPath>
</PropertyGroup>
<PropertyGroup Condition="'$(DOTNET_RUNNING_IN_CONTAINER)' != 'true'">
<BaseIntermediateOutputPath>$(MSBuildProjectDirectory)/obj/local/</BaseIntermediateOutputPath>
<BaseOutputPath>$(MSBuildProjectDirectory)/bin/local/</BaseOutputPath>
</PropertyGroup>
</Project>
根据 @bricelam 在this issue问题的根源就在这里:
Changing
BaseIntermediateOutputPath
from its default when not running inside a container breaks the EF Core tooling experience (*)
由于在 docker 容器外运行时,您的 BaseIntermediateOutputPath
从默认更改为 obj/local
,您需要做的是让 EF Core CLI 知道在哪里找到那个文件夹。您可以使用 --msbuildprojectextensionspath
参数来完成此操作。在您的情况下,它会像这样( as suggested here ):
dotnet ef migrations add NewMigration --msbuildprojectextensionspath obj/local
如果还是不行,可以关注讨论in this other issue .在那里,有人建议 another possible fix是稍微更改您的 Directory.Build.props
和 *.csproj
文件,使后者看起来如下所示:
<Project> <!-- Note: No Sdk="" here. -->
<PropertyGroup>
<!-- Don't use $(Configuration) since it isn't set yet. -->
<MSBuildProjectExtensionsPath>$(MSBuildProjectDirectory)\_intermediate_\</MSBuildProjectExtensionsPath>
</PropertyGroup>
<!-- MSBuildProjectExtensionsPath must be set before this gets imported. Directory.Build.props is too late. -->
<Import Project="Sdk.props" Sdk="Microsoft.NET.Sdk" />
<!-- (Project content goes here) -->
<Import Project="Sdk.targets" Sdk="Microsoft.NET.Sdk" />
</Project>
关于c# - NET 5 在 Entity Framework Core 上添加迁移时出错,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/66323260/