entity-framework - 实体框架中的表操作中的复合键

Question

我使用 Entity Framework 5 Code First 并且对复合键有一些问题。

我有那些桌子

这就是我映射实体的方式

 public class Product : EntityBase
    {
        public Product()
        {
            this.ProductArticles = new List<ProductArticle>();
        }

        [Key, Column(Order = 0)]
        [DatabaseGenerated(DatabaseGeneratedOption.None)]
        public int ProductId { get; set; }
        [Key, Column(Order = 1)]
        public int PricelistId { get; set; }
        public string Description { get; set; }
        public string Unit { get; set; }
        public string ReportText1 { get; set; }
        public string ReportText2 { get; set; }
        public bool Standard { get; set; }
        public int ProductGroupId { get; set; }
        public decimal? Surcharge1 { get; set; }
        public decimal? Surcharge2 { get; set; }
        public decimal? Surcharge3 { get; set; }
        public decimal? Surcharge4 { get; set; }
        public decimal PriceMaterialIn { get; set; }
        public decimal AdjMaterialIn { get; set; }
        public decimal F_PriceMaterialInAdj { get; set; }
        public decimal F_AdjMaterial { get; set; }
        public decimal F_PriceMaterialOut { get; set; }
        public decimal PriceArtisanIn { get; set; }
        public decimal F_AdjArtisan { get; set; }
        public decimal F_PriceArtisanOut { get; set; }
        public decimal F_TotalOut { get; set; }
        public decimal F_TotalOutVat { get; set; }
        public bool GetPrice { get; set; }
        public string Notes { get; set; }
        [ForeignKey("ProductGroupId,PricelistId")]
        public virtual ProductGroup ProductGroup { get; set; }
        [ForeignKey("ProductId,PricelistId")]
        public virtual ICollection<ProductArticle> ProductArticles { get; set; }
        [ForeignKey("PricelistId")]
        public virtual Pricelist Pricelist { get; set; }
    }



public class ProductGroup : EntityBase
    {
        [Key, Column(Order = 0)]
        public int ProductGroupId { get; set; }
        [Key, Column(Order = 1)]
        public int PricelistId { get; set; }
        public int OptionalGroupId { get; set; }
        public string Prefix { get; set; }
        public string Description { get; set; }
        public decimal? Surcharge1 { get; set; }
        public decimal? Surcharge2 { get; set; }
        public decimal? Surcharge3 { get; set; }
        public decimal? Surcharge4 { get; set; }
        public string ReportText1 { get; set; }
        public string ReportText2 { get; set; }
        [ForeignKey("OptionalGroupId,PricelistId")]
        public virtual OptionalGroup OptionalGroup { get; set; }
        [ForeignKey("PricelistId")]
        public virtual Pricelist Pricelist { get; set; }
    }

但是当构建上下文时，我会收到此消息

337,10）：错误 3015：从第 303、337 行开始映射片段时出现问题：从表 Product（PricelistId、ProductGroupId）到表 ProductGroup（ProductGroupId、PricelistId）的外键约束“Product_ProductGroup”：：映射不足：外键必须是映射到在概念方面参与外键关联的一些 AssociationSet 或 EntitySet。

Answer 1

我通过重新设计表格解决了这个问题。认为复合键是糟糕的设计。