好的,如果这是一个愚蠢的问题,我很抱歉,但我花了一天浏览文档并尝试了3种不同的NEST版本,最终结果是一样的。
基本上当我使用Elasticsearch的REST api来创建类型的映射时,我可以在映射上使用GET请求,并且我收到了我想要的内容:
"properties": {
"date": {
"type": "date",
"format": "basic_date"
},
"id": {
"type": "long",
"index": "no"
},
"name": {
"type": "string"
},
"slug": {
"type": "string",
"index": "no"
}
}
但是,如果我从头开始,并在c#中使用以下类:
[Number(Index = NonStringIndexOption.No)]
public long Id { get; set; }
[String(Name = "name")]
public string Name { get; set; }
[String(Name = "slug", Index = FieldIndexOption.No)]
public string Slug { get; set; }
[Date(Format = "dd-MM-yyyy", Index = NonStringIndexOption.No)]
public DateTime Date { get; set; }
并创建并填充索引:
node = new Uri("http://localhost:9200");
settings = new ConnectionSettings(node);
settings.DefaultIndex("searchable-items");
//retrieve stuff from relational db
client.IndexMany(allItemsRetrievedFromRelDb);
我的类型默认为以下(基本上忽略所有属性值,除了Name =)
"date": {
"type": "date",
"format": "strict_date_optional_time||epoch_millis"
},
"id": {
"type": "long"
},
"name": {
"type": "string"
},
"slug": {
"type": "string"
}
基本上我希望实现的是:
我的问题是 - 我做错了什么,为什么NEST无视我在属性中放置的内容?当前代码是v2.4.4,虽然我也尝试了5.0.0预发行版(那里的语法略有不同,但结果相同)。
答案 0 :(得分:3)
为了使属性映射生效,您需要告诉Elasticsearch有关映射的信息,无论是在使用.CreateIndex()
创建索引时,还是在创建索引之后以及索引任何文档之前,.Map()
。
以下是使用NEST 2.4.4进行演示的示例
void Main()
{
var pool = new SingleNodeConnectionPool(new Uri("http://localhost:9200"));
var defaultIndex = "searchable-items";
var connectionSettings = new ConnectionSettings(pool)
// specify the default index to use if
// 1. no index is specified on the request
// 2. no index can be inferred from the C# POCO type
.DefaultIndex(defaultIndex);;
var client = new ElasticClient(connectionSettings);
client.CreateIndex(defaultIndex, c => c
.Mappings(m => m
.Map<MyDocument>(mm => mm
// map MyDocument, letting
// NEST infer the mapping from the property types
// and attributes applied to them
.AutoMap()
)
)
);
var docs = new[] {
new MyDocument
{
Id = 1,
Name = "name 1",
Date = new DateTime(2016,08,26),
Slug = "/slug1"
},
new MyDocument
{
Id = 2,
Name = "name 2",
Date = new DateTime(2016,08,27),
Slug = "/slug2"
}
};
client.IndexMany(docs);
}
public class MyDocument
{
[Number(Index = NonStringIndexOption.No)]
public long Id { get; set; }
[String(Name = "name")]
public string Name { get; set; }
[String(Name = "slug", Index = FieldIndexOption.No)]
public string Slug { get; set; }
[Date(Format = "dd-MM-yyyy", Index = NonStringIndexOption.No)]
public DateTime Date { get; set; }
}
The Automapping documentation详细了解了如何使用the fluent API和the visitor pattern (for applying conventions).来控制POCO类型的映射