C#中的ValueObject获取错误实体类型“SkillLevel”需要定义主键

这是我的 SkillLevel valueobject类,该类应用于 EmployeeSkillType 联接表:

using System.Runtime.CompilerServices;

namespace sales.Domain.Common.ValueObjects
{
    public record SkillLevel 
    {
        List<Skill> Skill; 
        List<Level> Level; 

        private SkillLevel() { }

        public SkillLevel(List<Skill> skill, List<Level> level) 
        {
            Skill = skill;
            Level = level;
        }
    }
}

这就是我使用它的地方:

using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata.Builders;

using Pluralize.NET;
using sales.Domain.Common.BaseEntities;
using sales.Domain.Entities.Payroll;

namespace sales.Infrastructure.Data.Configs.Payroll
{
    internal class EmployeeSkillTypeConfiguration : IEntityTypeConfiguration<EmployeeSkillType>
    {
        public void Configure(EntityTypeBuilder<EmployeeSkillType> builder)
        {
            builder.ToTable(new Pluralizer().Pluralize(nameof(EmployeeSkillType)));
            builder.HasKey(ii => new { ii.EmployeeGuid, ii.SkillTypeGuid });
            builder.HasOne(e => e.Employee)
                .WithMany(es => es.EmployeeSkillType);
            builder.HasOne(st => st.SkillType)
                .WithMany(es => es.EmployeeSkillType);
            builder.HasMany(sl => sl.SKillLevels).WithOne();

            builder.Navigation(e => e.Employee).AutoInclude();
            builder.Navigation(st => st.SkillType).AutoInclude();
        }
    }
}

我收到这个错误

实体类型“SkillLevel”需要定义主键。如果您打算使用无钥匙实体类型,请在“OnModelCreating”中调用“HasNoKey”。有关无钥匙实体类型的更多信息,

我没有尝试太多——我把它改成了jsonb,但我又犯了一个错误