ServiceStack OrmLite 在 Where 子句中包含列但不包含 Select

Question

考虑下面的 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; }
}

我将 CustomerId 作为属性，因为我需要将其包含在生成的 SQL 的 WHERE 子句中，但我不希望列也被 selected 在结果集中。有没有办法将它包含在 where 中但从 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);

我已尝试添加 [Ignore] 属性，但因 SqlException: Invalid column name 'CustomerId' 而失败。

Answer 1

如果您不想填充整个 POCO，您需要指定一个自定义 Select，其中仅包含您要选择的字段，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 在 Where 子句中包含列但不包含 Select

ServiceStack OrmLite Include Column in Where Clause but Not Select

.net

c#

sql-server

servicestack

ormlite-servicestack