c# - Entity Framework 在查询中创建一个不存在的列

Question

这让我困惑了很长一段时间，但当我的 Entity Framework 尝试执行 oracle 查询时，我不断收到无效标识符错误。有问题的类如下:

public class Projectship : ModelTrackingBase
{

    [Column("PROJECTID")]     
    public long ProjectId { get; set; }

    [Column("VISITID")]
    public long VisitId { get; set; } 

    public virtual Bpid Bpid { get; set; } //new
    public virtual Visit Visit { get; set; }

}

和

 public class Bpid : EntityIdBase
{
    [Column("BUDPRJID")]
    [MaxLength(38)]
    public string BPId { get; set; }

    [Column("DESCRIPTION")]
    [MaxLength(255)]
    public string Description { get; set; }

    [Column("CSTOBJ")]
    [MaxLength(255)]
    public string Custobj { get; set; }

    [Column("PVID")]
    [MaxLength(255)]
    public string Pvid { get; set; }
    public virtual ICollection<Projectship> Projectships { get; set; }  

    public IEnumerable<Visit> Visits
    {
        get { return Projectships.Select(p => p.Visit); }
    }

    [NotMapped]
    public string DisplayName
    {
        get { return string.Format("{0}: {1}", BPId , Description); }
    }

}

现在 EntityIdBase 具有以下内容:

public class EntityIdBase : EntityBase
    {
        [Column("ID")]
        public long Id { get; set; }
    }

它会尝试在查询中继续查找 Bpid_Id 列。有人知道吗？

Answer 1

bpid_id是EF创建的，因为它不能自动判断关系。尝试添加注释:

[ForeignKey("ID")]
public virtual Bpid Bpid { get; set; } //new