在nhibernate中执行自定义查询并映射到自定义域对象 [英] Execute a custom query in nhibernate and map to a custom domain object

问题描述

我有这样的查询

SELECT Customer.Name, sum([Load].Profit) as Profit FROM Customer INNER JOIN [Load] ON Customer.Id = [Load].CustomerId GROUP BY Customer.Name

我需要在nhibernate中执行此查询并将其映射到我这样创建的自定义域对象

I need to execute this query in nhibernate and map it to a Custom domain object which i created as like this

public class CustomerProfit
    {
        public String Name;
        public Decimal Profit;

    }

有可能这样做吗?以及如何或是否有可能在HQL中执行此自定义查询?

Is it possible to do so ? and how , or is it possible to execute this custom query in HQL ?

推荐答案

public sealed class CustomerProfitQuery : IResultTransformer
{
    public static readonly string Sql = "SELECT Customer.Name, sum([Load].Profit) as Profit FROM Customer INNER JOIN [Load] ON Customer.Id = [Load].CustomerId GROUP BY Customer.Name";
    public static readonly CustomerProfitQuery Transformer = new CustomerProfitQuery();

    // make it singleton
    private CustomerProfitQuery()
    { }

    public IList TransformList(IList collection)
    {
        return collection;
    }

    public object TransformTuple(object[] tuple, string[] aliases)
    {
        return new CustomerProfit
        {
            Name = (string)tuple[0],
            Profit = (decimal)tuple[1],
        };
    }
}


// usage
var customerprofits = session.CreateSQLQuery(CustomerProfitQuery.Sql)
    .SetResultTransformer(CustomerProfitQuery.Transformer)
    .List<CustomerProfit>()

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