efcore2.1说已经向主键添加了多个列,但是它们没有

我试图使用efcore2.1创建一个关系模型,但是在添加迁移时,我收到一个错误消息:多个列被绑定到主键。看起来情况并非如此,我也不确定它为什么会这么认为。

我可以用下面的一个非常简单的项目进行复制,这就是错误所在。

“OwnedEntity”上的键{'ParentId'}和“Entity”上的{'Id'}都映射到'实体.PK_实体'但是有不同的列({'ParentId'}和{'Id'})。

here

删除ColumnAttribute允许添加迁移继续/成功,但我真的不希望 Owned

using System.ComponentModel.DataAnnotations.Schema;
using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;

namespace OwnedTypeTest
{
    public class Program
    {
        public static void Main(string[] args)
        {
            CreateWebHostBuilder(args).Build().Run();
        }

        public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
            WebHost.CreateDefaultBuilder(args).UseStartup<Startup>();
    }
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddDbContext<TestDBContext>(o=>o.UseSqlServer("test"));
        }

        public void Configure(IApplicationBuilder app, IHostingEnvironment env) { }
    }
    public class TestDBContext : DbContext
    {
        public TestDBContext(DbContextOptions options) : base(options) { }
        public DbSet<Entity> Entities { get; set; }
    }
    public class Entity
    {
        public System.Guid Id { get; set; }
        public OwnedEntity Owned { get; set; }
    }
    [Owned]
    public class OwnedEntity
    {
        [Column(nameof(ParentId))]
        public System.Guid ParentId { get; set; }
        [Column(nameof(Parent))]
        public Entity Parent { get; set; }
    }
}

如果我像下面这样覆盖OnModelCreating,我会得到注释结果

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    base.OnModelCreating(modelBuilder);
    Debugger.Launch();
    var et = modelBuilder.Model.GetEntityTypes(typeof(Entity)).First();
    var keys = et.GetKeys();
    var keyCount = keys.Count(); // 1
    var key = keys.First().ToString(); // Key: Entity.Id PK
    var properties = keys.First().Properties;
    var propertyCount = properties.Count(); // 1
    var property = properties.First().ToString(); // Property: Entity.Id (Guid) Required PK AfterSave:Throw ValueGenerated.OnAdd 0 0 0 -1 0
}

为了完整起见,这是我的csproj

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>netcoreapp2.1</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <Folder Include="wwwroot\" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="BuildBundlerMinifier" Version="2.6.375" />
    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.1.5" />
    <PackageReference Include="Microsoft.AspNetCore.Identity" Version="2.1.3" />
    <PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="2.1.3" />
    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="2.1.4" />
    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="2.1.1" />
    <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="2.1.1" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="2.1.4" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="2.1.4" />

  </ItemGroup>

</Project>

这是一个bug还是我遗漏了EF的一些隐含行为?如果我是,发生了什么事?