初识搜索引擎_手动建立和修改mapping 及 定制string类型数据是否分词

1.如何建立索引

PUT website
{
  "mappings": {
    "article":{
      "properties": {
        "author_id":{
          "type": "long"
        },
        "title":{
          "type": "text",
          "analyzer": "english"
        },
        "content":{
          "type": "text"
        },
        "post_date":{
          "type": "date"
        },
        "publisher_id":{
          "type": "text",
          "index": false 
        }
      }
    }
  }
}

运行结果

{
  "acknowledged": true,
  "shards_acknowledged": true,
  "index": "website"
}

2.修改mapping
只能创建index时手动建立mapping，或者新增field mapping，但是不能update field mapping
（1）update field mapping

PUT /website
{
  "mappings": {
    "article": {
      "properties": {
        "author_id": {
          "type": "text"
        }
      }
    }
  }
}

运行结果

{
  "error": {
    "root_cause": [
      {
        "type": "resource_already_exists_exception",
        "reason": "index [website/ReGvtNLiQnSFZ-LGEd_ymA] already exists",
        "index_uuid": "ReGvtNLiQnSFZ-LGEd_ymA",
        "index": "website"
      }
    ],
    "type": "resource_already_exists_exception",
    "reason": "index [website/ReGvtNLiQnSFZ-LGEd_ymA] already exists",
    "index_uuid": "ReGvtNLiQnSFZ-LGEd_ymA",
    "index": "website"
  },
  "status": 400
}

（2）新增field mapping

PUT website/_mapping/article
{
  "properties": {
    "new_field":{
      "type": "keyword",
      "index": false
     
    }
  }
}

运行结果

{
  "acknowledged": true
}

3.测试mapping

GET website/_analyze
{
  "field": "new_field",
  "text": "my-dogs"
}

运行结果

{
  "tokens": [
    {
      "token": "my-dogs",
      "start_offset": 0,
      "end_offset": 7,
      "type": "word",
      "position": 0
    }
  ]
}

GET website/_analyze
{
  "field": "content",
  "text": "my dog"
}

运行结果

{
  "tokens": [
    {
      "token": "my",
      "start_offset": 0,
      "end_offset": 2,
      "type": "<ALPHANUM>",
      "position": 0
    },
    {
      "token": "dog",
      "start_offset": 3,
      "end_offset": 6,
      "type": "<ALPHANUM>",
      "position": 1
    }
  ]
}