Question

考虑我在下面的LoyaltyCard数据库DTO：

[Alias("customer_ids")]
[CompositeIndex("id_code", "id_number", Unique = true)]
public class LoyaltyCard
{
    [Alias("customer_code")]
    public int CustomerId { get; set; }

    [Alias("id_code")]
    public string LoyaltyCardCode { get; set; }

    [Alias("id_number")]
    public string LoyaltyCardNumber { get; set; }

    [Alias("date_issued ")]
    public DateTime? IssueDate { get; set; }

    [Alias("linked_id")]
    public bool LinkedId { get; set; }

    [Alias("positive_id")]
    public bool PositiveId { get; set; }
}

我有CustomerId作为属性，因为我需要它包含在生成的SQL的WHERE子句中，但我不希望在结果中也选择该列组。有没有办法将它包含在哪里但是从select中排除？

// I was hoping that result would not have a populated CustomerIds
var result = db.Select<LoyaltyCard>(id => id.LoyaltyCardCode == "PS" && id.CustomerId == customerCode);

我尝试添加[Ignore]属性，但失败了SqlException: Invalid column name 'CustomerId'。

Answer 1

如果您不想填充整个POCO，则需要指定仅包含您想要选择的字段的自定义选择，例如：

var result = db.Select<LoyaltyCard>(db.From<LoyaltyCard>()
   .Where(id => id.LoyaltyCardCode == "PS" && id.CustomerId == customerCode)
   .Select(x => new { 
       x.LoyaltyCardCode,
       x.LoyaltyCardNumber,
       x.IssueDate,
       x.LinkedId,
       x.PositiveId
   }));

ServiceStack OrmLite包含Where子句但不选择的列

1 个答案: