ElasticSearch Index API && Mapping

Posted 2020-09-08 LittleFeiHu

ElasticSearch  NEST Client 操作Index

                 var indexName="twitter";

                var deleteIndexResponse = client.DeleteIndex(indexName);
                var createIndexResponse = client.CreateIndex(indexName);
                var getIndexResponse = client.GetIndex(indexName);
                var indexExistsResponse = client.IndexExists(indexName);
                var openIndexResponse=client.OpenIndex(indexName);
                var closeIndexResponse=client.CloseIndex(indexName);

 

1.创建Index

PUT twitter
{
}

 

2.删除Index

DELETE /twitter

3.获取Index

GET /twitter

4.检查是否存在Index

HEAD twitter

5.打开关闭Index

POST /twitter/_close

POST /twitter/_open

PUT mapping

1.创建Index 同时为字段添加Mapping

PUT twitter 
{
  "mappings": {
    "tweet": {
      "properties": {
        "message": {
          "type": "text"
        }
      }
    }
  }
}

 2.给已存在的Index添加文档类型，同时指定Mapping

PUT twitter/_mapping/user 
{
  "properties": {
    "name": {
      "type": "text"
    }
  }
}

 3.给已经存在的Mapping添加新的字段Mapping

PUT twitter/_mapping/tweet 
{
  "properties": {
    "user_name": {
      "type": "text"
    }
  }
}

 注意：通常来说，已经存在的 字段Mapping 是不能够被修改的。

Get Mapping API

获取整个文档的Mapping信息

GET /twitter/_mapping/tweet

 Get Field Mapping API

获取指定字段的Mapping信息

GET publications/_mapping/article/field/title