Question

我遇到的问题是，在我的代码首次迁移中生成额外的字段，以及我不想要的关系。我有一个基本型号，LotteryCarts

[Table("lottery_carts")]
public class LotteryCart : Auditable
{
    public LotteryCart()
    {
        LotteryCartItems = new List<LotteryCartItem>();
    }
    //stored in banner: no
    [Key]
    [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
    public int Id { get; set; }

    [Required(ErrorMessage = "A lottery is required.")]
    public int LotteryId { get; set; }
    public virtual Lottery Lottery { get; set; }

    public virtual List<LotteryCartItem> LotteryCartItems { get; set; }
}

和LotteryCartItem

public class LotteryCartItem
{

    [Key, Column(Order=0)]
    public int ClassId { get; set; }
    public virtual Class Class { get; set; }

    [Key, Column(Order = 1)]
    public int LotteryCartId { get; set; }
    public virtual LotteryCart LotteryCart { get; set; }

    public int BidWeight { get; set; }
    public int order { get; set; }
    public string type { get; set; }
}

LotteryCartItem只是LotteryCart和类之间的连接（带有一些额外的元数据）

出于某种原因，我不明白代码第一次迁移正在生成额外的字段

        CreateTable(
            "dbo.LotteryCartItems",
            c => new
                {
                    ClassId = c.Int(nullable: false),
                    LotteryCartId = c.Int(nullable: false),
                    BidWeight = c.Int(nullable: false),
                    order = c.Int(nullable: false),
                    type = c.String(),
                })
            .PrimaryKey(t => new { t.ClassId, t.LotteryCartId })
            .ForeignKey("dbo.classes", t => t.ClassId, cascadeDelete: true)
            .ForeignKey("dbo.lottery_carts", t => t.LotteryCartId, cascadeDelete: true)
            .Index(t => t.ClassId)
            .Index(t => t.LotteryCartId);

        AddColumn("dbo.lottery_carts", "Class_Id", c => c.Int());
        AddColumn("dbo.lottery_carts", "Class_Id1", c => c.Int());
        AddForeignKey("dbo.lottery_carts", "Class_Id", "dbo.classes", "Id");
        AddForeignKey("dbo.lottery_carts", "Class_Id1", "dbo.classes", "Id");

我不确定为什么lottery_carts上有class_Id和Class_Id1，似乎没有直接关系。

提前感谢您的帮助！

Answer 1

LotteryCartItem应该正确定义

public class LotteryCartItem
{

    [DatabaseGeneratedAttribute(DatabaseGeneratedOption.None)]
    [Key, Column(Order=0), ForeignKey("Class")]
    public int ClassId { get; set; }
    public virtual Class Class { get; set; }

    [DatabaseGeneratedAttribute(DatabaseGeneratedOption.None)]
    [Key, Column(Order=1), ForeignKey("LotteryCart")]
    public int LotteryCartId { get; set; }
    public virtual LotteryCart LotteryCart { get; set; }

    public int BidWeight { get; set; }
    public int order { get; set; }
    public string type { get; set; }
}

首先在代码中创建额外的密钥

1 个答案: