dapper - Slapper.Automapper 与 Dapper.net 使用 Guid Id

Question

我需要使用 Dapper.net 将一对多扁平化 SQL 查询映射到嵌套对象中。

Slapper.Automapper 似乎是一个很好的方法；正如这个问题的答案中所详细说明的:

How do I write one to many query in Dapper.Net?

我使用Guids得到的错误数据集:

public string MrFlibble3()
{
    using (var connection = new SqlConnection(Constr))
    {
        Slapper.AutoMapper.Cache.ClearInstanceCache();

        const string sql = @"SELECT tc.[IDG] as ContactIdg
                                ,tc.[ContactName] as ContactName
                                ,tp.[Idg] AS TestPhones_PhoneIdg
                                ,tp.[ContactIdg] AS TestPhones_ContactIdg
                                ,tp.[Number] AS TestPhones_Number
                                FROM TestContact tc
                                INNER JOIN TestPhone tp ON tc.Idg = tp.ContactIdg";

        // Step 1: Use Dapper to return the  flat result as a Dynamic.
        dynamic test = connection.Query<dynamic>(sql);

        // Step 2: Use Slapper.Automapper for mapping to the POCO Entities.
        // - IMPORTANT: Let Slapper.Automapper know how to do the mapping;
        //   let it know the primary key for each POCO.
        // - Must also use underscore notation ("_") to name parameters;
        //   see Slapper.Automapper docs.
        Slapper.AutoMapper.Configuration.AddIdentifiers(typeof(TestContact), new List<string> { "ContactIDg" });
        Slapper.AutoMapper.Configuration.AddIdentifiers(typeof(TestPhone), new List<string> { "PhoneIdg" });

        var testContact = (Slapper.AutoMapper.MapDynamic<TestContact>(test) as IEnumerable<TestContact>).ToList();

        string flibblethis = "";

        foreach (var c in testContact)
        {
            foreach (var p in c.TestPhones)
            {
                // Console.Write("ContactName: {0}: Phone: {1}\n", c.ContactName, p.Number);
                flibblethis += "Contact Name: " + c.ContactName + ". Number: " + p.Number + "<br />";
            }
        }

        return flibblethis;
    }
}

它在示例中运行良好 - 但如果 Id 是 Guid 而不是整数，Slapper.Automapper 似乎不起作用。

是否有任何方法可以将 Guid ID 与 Slapper.Automapper 一起使用 - 或者是否有其他方法可以使用 Dapper.net 进行映射？

(Slapper.Automapper 并未广泛使用，我在网上找不到任何有关此问题的信息)。

Answer 1

您的属性名称中的大小写不同，例如ContactIdg 和 ContactIDg。 Slapper 区分大小写映射，请参阅 this issue .