C# 实体框架代码首次迁移后的外来列 [表（“IpForeclosureActionHeaders”）] 公共类止赎行动标题：FullAuditedEntity { //为了清晰起见，删除了其他属性 [外国密钥（“银行ID”）] 公共虚拟银行{get；set；} 公共虚拟整数BankId{get；set；} [外国钥匙（“转让银行ID”）] 公共虚拟银行已分配给银行{get；set；} 公共虚拟int赋值数据库ID{get；set；} } [表（“IpBanks”）] 公共类银行：全面审计 { //为了清晰起见，删除了其他属性 公共虚拟ICollection止赎ActionHeaders{get；set；} 公共虚拟ICollection AssignedToBankForeclosureActionHeaders{get；set；} }

迁移文件：

    [Table("IpForeclosureActionHeaders")]
    public class ForeclosureActionHeader : FullAuditedEntity
    {
        // removed other properties for clarity

        [ForeignKey("BankId")]
        public virtual Bank Bank { get; set; }
        public virtual int BankId { get; set; }

        [ForeignKey("AssignedToBankId")]
        public virtual Bank AssignedToBank { get; set; }
        public virtual int AssignedToBankId { get; set; }

    }

    [Table("IpBanks")]
    public class Bank : FullAuditedEntity
    {
         // removed other properties for clarity

        public virtual ICollection<ForeclosureActionHeader> ForeclosureActionHeaders { get; set; }

        public virtual ICollection<ForeclosureActionHeader> AssignedToBankForeclosureActionHeaders { get; set; }
    }

public override void Up()
        {
            CreateTable(
                "dbo.IpForeclosureActionHeaders",
                c => new
                {
                    Id = c.Int(nullable: false, identity: true),

                    BankId = c.Int(nullable: false),
                    AssignedToBankId = c.Int(nullable: false),
                    Bank_Id = c.Int(),
                    Bank_Id1 = c.Int(),
                },
                annotations: new Dictionary<string, object>
                {
                    {
                        "DynamicFilter_ForeclosureActionHeader_SoftDelete",
                        "EntityFramework.DynamicFilters.DynamicFilterDefinition"
                    },
                })
                .PrimaryKey(t => t.Id)
                .ForeignKey("dbo.IpBanks", t => t.Bank_Id)
                 .ForeignKey("dbo.IpBanks", t => t.Bank_Id1)
                .ForeignKey("dbo.IpBanks", t => t.AssignedToBankId, cascadeDelete: false)
                .ForeignKey("dbo.IpBanks", t => t.BankId, cascadeDelete: false)
                 .Index(t => t.BankId)
                .Index(t => t.AssignedToBankId)
             .Index(t => t.Bank_Id)
             .Index(t => t.Bank_Id1)

        }

        public override void Down()
        {
            DropForeignKey("dbo.IpForeclosureActionHeaders", "BankId", "dbo.IpBanks");
            DropForeignKey("dbo.IpForeclosureActionHeaders", "AssignedToBankId", "dbo.IpBanks");
            DropForeignKey("dbo.IpForeclosureActionHeaders", "Bank_Id1", "dbo.IpBanks");
            DropForeignKey("dbo.IpForeclosureActionHeaders", "Bank_Id", "dbo.IpBanks");
            DropIndex("dbo.IpForeclosureActionHeaders", new[] { "Bank_Id1" });
            DropIndex("dbo.IpForeclosureActionHeaders", new[] { "Bank_Id" });
            DropIndex("dbo.IpForeclosureActionHeaders", new[] { "AssignedToBankId" });
            DropIndex("dbo.IpForeclosureActionHeaders", new[] { "BankId" });
            DropTable("dbo.IpForeclosureActionHeaders",
                removedAnnotations: new Dictionary<string, object>
                {
                    { "DynamicFilter_ForeclosureActionHeader_SoftDelete", "EntityFramework.DynamicFilters.DynamicFilterDefinition" },
                });
        }
    }

public override void Up（）
{
创建表(
“dbo.IpForeclosureActionHeaders”，
c=>新的
{
Id=c.Int（可为空：false，标识：true），
BankId=c.Int（可为空：false），
AssignedToBankId=c.Int（可为空：false），
Bank_Id=c.Int（），
Bank_Id1=c.Int（），
},
注释：新词典
{
{
“DynamicFilter\u止赎行动标题\u SoftDelete”，
“EntityFramework.DynamicFilters.DynamicFilterDefinition”
},
})
.PrimaryKey（t=>t.Id）
.ForeignKey（“dbo.IpBanks”，t=>t.Bank\u Id）
.ForeignKey（“dbo.IpBanks”，t=>t.Bank_Id1）
.ForeignKey（“dbo.IpBanks”，t=>t.AssignedToBankId，cascadeDelete:false）
.ForeignKey（“dbo.IpBanks”，t=>t.BankId，cascadeDelete:false）
.Index（t=>t.BankId）
.Index（t=>t.AssignedToBankId）
.Index（t=>t.Bank\u Id）
.Index（t=>t.Bank_Id1）
}
公共覆盖无效向下（）
{
DropForeignKey（“dbo.IpForeclosureActionHeaders”、“BankId”、“dbo.IpBanks”）；
DropForeignKey（“dbo.IpForeclosureActionHeaders”、“AssignedToBankId”、“dbo.IpBanks”）；
DropForeignKey（“dbo.IpForeclosureActionHeaders”、“Bank_Id1”、“dbo.IpBanks”）；
DropForeignKey（“dbo.IpForeclosureActionHeaders”、“Bank_Id”、“dbo.IpBanks”）；
DropIndex（“dbo.IpForeclosureActionHeaders”，新[]{“Bank_Id1”}）；
DropIndex（“dbo.IpForeclosureActionHeaders”，新[]{“Bank_Id”}）；
DropIndex（“dbo.IpForeclosureActionHeaders”，新[]{“AssignedToBankId”}）；
DropIndex（“dbo.IpForeclosureActionHeaders”，新[]{“BankId”}）；
DropTable（“dbo.IpForeclosureActionHeaders”，
removedAnnotations：新词典
{
{“DynamicFilter\u止赎ActionHeader\u SoftDelete”，“EntityFramework.DynamicFilter.DynamicFilterDefinition”}，
});
}
}

---

Q:你能告诉我为什么它会在

IpForeclosureActionHeaders

表上创建

Bank\u Id

和

Bank\u Id 1

列吗？因为我为这些列命名为

BankId

和

AssignedToBankId

。我怎样才能避免呢？提前谢谢

您可以阅读此线程-通常情况相同：

InverseProperty

将帮助您避免这种不必要的引用

解决方案：

    [Table("IpForeclosureActionHeaders")]
    public class ForeclosureActionHeader : FullAuditedEntity
    {
        // removed other properties for clarity

        [ForeignKey("BankId")]
        public virtual Bank Bank { get; set; }
        public virtual int BankId { get; set; }

        [ForeignKey("AssignedToBankId")]
        public virtual Bank AssignedToBank { get; set; }
        public virtual int AssignedToBankId { get; set; }

    }

    [Table("IpBanks")]
    public class Bank : FullAuditedEntity
    {
         // removed other properties for clarity

        public virtual ICollection<ForeclosureActionHeader> ForeclosureActionHeaders { get; set; }

        public virtual ICollection<ForeclosureActionHeader> AssignedToBankForeclosureActionHeaders { get; set; }
    }

public override void Up()
        {
            CreateTable(
                "dbo.IpForeclosureActionHeaders",
                c => new
                {
                    Id = c.Int(nullable: false, identity: true),

                    BankId = c.Int(nullable: false),
                    AssignedToBankId = c.Int(nullable: false),
                    Bank_Id = c.Int(),
                    Bank_Id1 = c.Int(),
                },
                annotations: new Dictionary<string, object>
                {
                    {
                        "DynamicFilter_ForeclosureActionHeader_SoftDelete",
                        "EntityFramework.DynamicFilters.DynamicFilterDefinition"
                    },
                })
                .PrimaryKey(t => t.Id)
                .ForeignKey("dbo.IpBanks", t => t.Bank_Id)
                 .ForeignKey("dbo.IpBanks", t => t.Bank_Id1)
                .ForeignKey("dbo.IpBanks", t => t.AssignedToBankId, cascadeDelete: false)
                .ForeignKey("dbo.IpBanks", t => t.BankId, cascadeDelete: false)
                 .Index(t => t.BankId)
                .Index(t => t.AssignedToBankId)
             .Index(t => t.Bank_Id)
             .Index(t => t.Bank_Id1)

        }

        public override void Down()
        {
            DropForeignKey("dbo.IpForeclosureActionHeaders", "BankId", "dbo.IpBanks");
            DropForeignKey("dbo.IpForeclosureActionHeaders", "AssignedToBankId", "dbo.IpBanks");
            DropForeignKey("dbo.IpForeclosureActionHeaders", "Bank_Id1", "dbo.IpBanks");
            DropForeignKey("dbo.IpForeclosureActionHeaders", "Bank_Id", "dbo.IpBanks");
            DropIndex("dbo.IpForeclosureActionHeaders", new[] { "Bank_Id1" });
            DropIndex("dbo.IpForeclosureActionHeaders", new[] { "Bank_Id" });
            DropIndex("dbo.IpForeclosureActionHeaders", new[] { "AssignedToBankId" });
            DropIndex("dbo.IpForeclosureActionHeaders", new[] { "BankId" });
            DropTable("dbo.IpForeclosureActionHeaders",
                removedAnnotations: new Dictionary<string, object>
                {
                    { "DynamicFilter_ForeclosureActionHeader_SoftDelete", "EntityFramework.DynamicFilters.DynamicFilterDefinition" },
                });
        }
    }