EF code first 外键配置的可空 生成的Migrations属性为不可空

实体

[ForeignKey("juchuId")]public virtual TFzm004 juchuTFzm004 { get; set; }

/// /// JUCHU_ID/// [Column("JUCHU_ID", TypeName = "numeric")]public virtual decimal? juchuId { get; set; }

关联实体

/// /// TFcd008/// [ForeignKey("juchuId")]public virtual IList TFcd008s { get; set; }

实体已经配置成可空 为什么生成的Migrations就变成非空了 如下

public partial class test1 : DbMigration{public override void Up(){DropIndex("dbo.T_FCD008", new[] { "JUCHU_ID" });AlterColumn("dbo.T_FCD008", "JUCHU_ID", c => c.Decimal(nullable: false, precision: 38, scale: 0, storeType: "numeric"));CreateIndex("dbo.T_FCD008", "JUCHU_ID");}

public override void Down(){DropIndex("dbo.T_FCD008", new[] { "JUCHU_ID" });AlterColumn("dbo.T_FCD008", "JUCHU_ID", c => c.Decimal(precision: 38, scale: 0, storeType: "numeric"));CreateIndex("dbo.T_FCD008", "JUCHU_ID");}}

这个是ef就这么设置的还是说有接口可以配置呀