ElasticSearch文档的基本操作

上文讲述如何创建索引与映射，ElasticSearch文档相当于是具体数据了，本文讲述ElasticSearch中文档的基本操作。

创建文档如果不指定id会默认创建，默认创建的id是UUID格式的

添加文档——手动指定_id

注意路径，路径最后跟上的要和json数据中的id保持一致。

POST /products/_doc/1
{
  "id": 1,
  "title": "松鼠",
  "price": 0.5,
  "created_at": "2022-10-10",
  "description": "可爱的松鼠"
}

添加文档——自动生成文档id

POST /products/_doc/
{
  "title":"iphone14",
  "price":8999.99,
  "created_at":"2021-09-15",
  "description":"iPhone 13屏幕采用6.8英寸OLED屏幕"
}

查询文档

GET /products/_doc/1

返回的数据如下：

{
  "_index" : "products",
  "_type" : "_doc",
  "_id" : "1",
  "_version" : 1,
  "_seq_no" : 1,
  "_primary_term" : 1,
  "found" : true,
  "_source" : {
    "id" : 1,
    "title" : "松鼠",
    "price" : 0.5,
    "created_at" : "2022-10-10",
    "description" : "可爱的松鼠"
  }
}

更新文档

PUT /products/_doc/1
{
  "title": "仓鼠"
}

更新后查询发现，映射只剩下title，之前的id、price等映射全都没有了

{
  "_index" : "products",
  "_type" : "_doc",
  "_id" : "1",
  "_version" : 5,
  "_seq_no" : 5,
  "_primary_term" : 1,
  "found" : true,
  "_source" : {
    "title" : "仓鼠"
  }
}

删除文档

DELETE /products/_doc/1

批量操作

批量索引两条文档

POST /products/_doc/_bulk
 	{"index":{"_id":"1"}}
  		{"title":"iphone14","price":8999.99,"created_at":"2021-09-15","description":"iPhone 13屏幕采用6.8英寸OLED屏幕"}
	{"index":{"_id":"2"}}
  		{"title":"iphone15","price":8999.99,"created_at":"2021-09-15","description":"iPhone 15屏幕采用10.8英寸OLED屏幕"}

更新文档同时删除文档

POST /products/_doc/_bulk
	{"update":{"_id":"1"}}
		{"doc":{"title":"iphone17"}}
	{"delete":{"_id":2}}
	{"index":{}}
		{"title":"iphone19","price":8999.99,"created_at":"2021-09-15","description":"iPhone 19屏幕采用61.8英寸OLED屏幕"}

批量时不会因为一个失败而全部失败,而是继续执行后续操作,在返回时按照执行的状态返回!