Question

我正在尝试使用Npoco，但遇到了FetchOneToMany的一些问题

我有一个连接2个表的sql语句，我输出所有列。

   [TableName("TableA")]
    [PrimaryKey("Id")]
    public class TableA
    {
        public int Id { get; set; }
        public DateTime EffectiveDate { get; set; }
         public IList<TableB> TableBs { get; set; }
    }

    [TableName("TableB")]
    [PrimaryKey("TableBId")]
    public class TableB
    {
        public int TableBId { get; set; }
        public int SomeNumber { get; set; }
          public int Id { get; set; } // TableA id
    }


Func<TableA, object> func1 = (x) => x.Id;
            Func<TableB, object> func2 = (x) => x.Id;
  var test = RelationExtensions.FetchOneToMany<AdminFeeBandGroup, AdminFeeBand>(unitOfWork.Db, func1,func2,sql, 1,1,"10-18-2012","10-22-2012");

我在实际查询中传递了4个参数。我得到一个结果，TableBs property已填满，看起来不错。但是，由于某种原因，EffectiveDate未被填充，并且是默认的C＃时间。

我错过了什么？

修改

这就是我的查询

SELECT     TableA.Id, TableA.EffectiveDate, TableB.TableBId, TableB.SomeNumber
FROM         TableA INNER JOIN
                      TableB ON TableA.Id = TableB.Id
WHERE     (TableA.EffectiveDate = @0)


Func<TableA, object> func1 = (x) => x.Id;
            Func<TableB, object> func2 = (x) => x.Id;
  var test = RelationExtensions.FetchOneToMany<AdminFeeBandGroup, AdminFeeBand>(unitOfWork.Db, func1,func2,sql, "10-18-2012");

Answer 1

这是应该如何运作的。

var sql = "select a.*, b.* from tablea a 
    inner join tableb b on a.id = b.id 
    where EffectiveDate = @0"

List<TableA> results = 
    db.FetchOneToMany<TableA,TableB>(x=>x.Id, sql, new DateTime(2012,10,18))

您必须确保按照列出通用参数的顺序选择列。

如何使用Npoco FetchOneToMany？

1 个答案: