dapper join splitOn多列键

本文介绍了dapper join splitOn多列键的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在一家拥有巨大数据库的新公司中工作...我正在尝试将dapper引入orm ...

i'm working in new company with huge db...i'm trying to introduce dapper as orm...

我在两个表之间具有1-N的关系，并且具有多个PK

i've got a relation 1-N between two tables, with multi PK

我的查询类似于

SELECT * 
FROM testmag INNER JOIN movmag  ON 
movmag.code= testmag.code AND
 tm_type = mm_type 
 AND tm_year = mm_year
 AND tm_serie = mm_serie
 AND tm_documentNumber = mm_documentNumber

和我的表类模型:

public class testMag
{
        [Key]
        [Column(Order = 0)]
        public string code{ get; set; }

        [Key]
        [Column(Order = 1)]
        public string tm_type { get; set; }

        [Key]
        [Column(Order = 2)]
        public short tm_year { get; set; }

        [Key]
        [Column(Order = 3)]
        public string tm_serie { get; set; }

        [Key]
        [Column(Order = 4)]
        public int tm_documentNumber { get; set; }

        ...
}

public class movMag
{
    [Key]
    [Column(Order = 0)]
    public string code { get; set; }

    [Key]
    [Column(Order = 1)]
    public string mm_type { get; set; }

    [Key]
    [Column(Order = 2)]
    public short mm_year { get; set; }

    [Key]
    [Column(Order = 3)]
    public string mm_serie { get; set; }

    [Key]
    [Column(Order = 4)]
    public int mm_documentNumber { get; set; }

    [Key]
    [Column(Order = 5)]
    public int mm_row { get; set; }

    ... 
}

我正在尝试使用仅一个splitOn键和所有键的精简查询

i'm trying these dapper query, with only one splitOn key and with all keys

 string qJoin2 = "SELECT top 10 * FROM testmag INNER JOIN movmag  ON movmag.code= testmag.code AND tm_type = mm_type AND tm_year = mm_year  AND tm_serie = mm_serie  AND tm_documentNumber = mm_documentNumber  ";

            var res = connection.Query<movmag, testmag, Tuple<movmag, testmag>>(
                qJoin2,
                Tuple.Create,
                splitOn: "code,tm_type,tm_year,tm_serie,tm_documentNumber,code,mm_type,mm_year,mm_serie,mm_documentNumber,mm_row").ToList();


            var res2 = connection.Query<movmag, testmag, Tuple<movmag, testmag>>(
                qJoin2,
                Tuple.Create,
                splitOn: "code").ToList();

我错了吗?有人可以向我解释！非常感谢

where i'm wrong? someone could explain me!?many thanks

推荐答案

我在dapper.query()中更改了类型顺序而且可以同时使用

i've changed type order in dapper.query()and it works on both

  var res = connection.Query<testmag, movmag, Tuple<testmag, movmag>>(
                    qJoin2,
                    Tuple.Create,
                    splitOn: "codditt,tm_tipork,tm_anno,tm_serie,tm_numdoc,codditt,mm_tipork,mm_anno,mm_serie,mm_numdoc,mm_riga").ToList();

            var res2 = connection.Query<testmag, movmag, Tuple<testmag, movmag>>(
                qJoin2,
                Tuple.Create,
                splitOn: "codditt").ToList();

这篇关于dapper join splitOn多列键的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

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