实体框架将非现有列添加到查询中

Question

我正在使用EF6.1.3。我有3个poco的pickbatch，order，orderline。

public class PickBatch
{
    public int Id { get; set; }
    public string Barcode { get; set; }
    public byte Status { get; set; }
    public string Picker { get; set; }
    public DateTime DateCreated { get; set; }
    public DateTime? DateModified { get; set; }
    public List<Order> Orders { get; set; }
}

public class Boxes
{
    public Order()
    {
        OrderLines = new List<OrderLines>();
    }

    public int Id { get; set; }
    public int? PickBatchId { get; set; }
    public string OrderType { get; set; }
    public string OrderNumber { get; set; }
    public string CustomerNumber { get; set; }
    public byte Status { get; set; }
    public DateTime DateCreated { get; set; }
    public DateTime? DateModified { get; set; }
    public List<OrderLine> OrderLines { get; set; }
}

public class OrderLines
{
    public int Id { get; set; }
    public string Article { get; set; }
    public string ArticleDescription { get; set; }
    public int QtyOrdered { get; set; }
    public int QtyDelivered { get; set; }
    public int OrderId { get; set; }
    public byte Status { get; set; }
    public string Picker { get; set; }
    public string PickLocation { get; set; } 
    public string Sorting { get; set; }
    public DateTime DateCreated { get; set; }
    public DateTime? DateModified { get; set; } 
}

并非所有属性都与表中的列名匹配。所以在模型创建上我正在解决这个问题。

protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Entity<PickBatch>().ToTable("PickBatch");
        modelBuilder.Entity<PickBatch>().HasKey(b => b.Id);
        modelBuilder.Entity<PickBatch>().Property(b => b.Id).HasColumnName("PickBatchId");

        modelBuilder.Entity<Order>().HasKey(b => b.Id);
        modelBuilder.Entity<Order>().Property(b => b.Id).HasColumnName("OrderId");


        modelBuilder.Entity<OrderLine>().HasKey(b => b.Id);
        modelBuilder.Entity<OrderLine>().Property(o => .Id).HasColumnName("OrderLineId");  

    }

检索订单时，我得到一个execption：无效的列名'PickBatch_Id'。我不明白为什么EF想要添加这个属性？