具有复合键的EntityFramework导航属性

Question

我正在寻找一些实体时检索一些额外的数据。这是我到目前为止的位置。

Parts表将多次具有相同的Part（多个集合），当我尝试应用Migration时，HasForeignKey出现错误（e => new {e.Number，e.ColorId}）；因为它不是唯一的。还有另一种方法吗？

编辑：添加集时，不需要添加“ MyPart”记录。

// Tables

    public class Set
    {
        public int Id { get; set; }
        public string Number { get; set; }
        public string Name { get; set; }
        public int NumberOfParts { get; set; }

        public IList<Part> Parts 
    }

    public class Part
    {
        public int Id { get; set; }
        public string Number { get; set; }
        public int ColorId { get; set; }
        public int Quantity { get; set; }

        public Set Set { get; set; }        
    }

    public class MyParts
    {
        public int Id { get; set; }
        public string Number { get; set; }
        public int ColorId { get; set; }
        public int Quantity { get; set; }   
        public string Location { get; set; }
    }

    / Repo Method
    public async Task<Set> GetSetAsync(string number, CancellationToken cancellationToken = default)        
    {
        //My Call to get the data
        var set = await Get<Set>()  
            Where(s => s.Number == number)
            .Include(x => x.Parts)
            .SingleOrDefaultAsync(cancellationToken);

        return set;
    }

我正在寻找MyParts.Location和MyParts.Quantity作为GetSetAsync（）的一部分

我添加了

    modelBuilder.Entity<Part>()
                .HasOptional(e => e.MyPart) // I may not have the part
                .WithOne()
                .HasForeignKey(e => new { e.Number, e.ColorId });  

所需查询

    Select  set.*,
            part.*
            myParts.Location,
            myParts.Quantity
    FROM    Set set
    INNER JOIN Part part on set.Id = part.setId
    LEFT JOIN MyParts myParts on my Parts.ColorId = part.ColorId and myParts.Number = part.Number

预先感谢