c# - 使用 NEST 无法将文档自动映射到 elasticsearch

Question

我在 C# 中有一个简单的 Dummy 文档。我第一次尝试使用 NEST 客户端将它索引到 elasticsearch 中。但是自动映射不起作用。

我的虚拟文档是:

class DummyRecord {
    public string RecordName;
    public int RecordId;
}

主要程序是:

class Program
{
    static void Main(string[] args)
    {
        var node = new Uri("http://localhost:9200");
        var settings = new ConnectionSettings(node).DefaultTypeName("_doc");
        var client = new ElasticClient(settings);

        var doc = new DummyRecord {
            RecordName = "SOmething",
            RecordId = 1
        };
            
        var creaeIndexRespone = client.CreateIndex("DummyIndex",c => c.Mappings(ms=> ms.Map<DummyRecord>(m => m.AutoMap())));
        Console.WriteLine(creaeIndexRespone);
            
        var response = client.Index(doc, idx => idx.Index("DummyIndex"));
        Console.WriteLine(response);
        Console.ReadKey();
    }
}

我得到的只是以下输出:

Invalid NEST response built from a unsuccessful low level call on PUT: /DummyIndex

Invalid NEST response built from a unsuccessful low level call on POST: /DummyIndex/_doc

如何让这个东西工作。在创 build 置时，我还需要做些什么吗？？

var settings = new ConnectionSettings(node).DefaultTypeName("_doc");

Answer 1

两件事

1. 索引名称需要小写，即 "DummyIndex" -> "dummyindex"
2. DummyRecord 成员需要是属性而不是字段

您可以检查对任何 API 调用的响应是否有效，并在需要时采取措施

var client = new ElasticClient();

var createIndexResponse = client.CreateIndex(defaultIndex, c => c
    .Mappings(m => m
        .Map<DummyRecord>(mm => mm
            .AutoMap()
        )
    )
);

if (!createIndexResponse.IsValid) {
    Console.WriteLine(createIndexResponse.DebugInformation);
}