三、elasticsearch增删改查

一、新建索引

put http://{{host}}:9200/liarbry

二、增加document

1. 指定id

put http://{{host}}:9200/liarbry/books/1
{
	"title":"spring boot program idea3",
	"user":{
		"first":"hongwei",
		"last":"zhang"
	},
	"price":300
}

2. 不指定id

post  http://{{host}}:9200/liarbry/books
{
	"title":"spring boot program idea",
	"user":{
		"first":"hongwei",
		"last":"zhang"
	},
	"price":200
}

三、更新document

1. 覆盖更新
   这个时候body中有什么字段，最终就会有什么字段

put http://{{host}}:9200/liarbry/books/1
{
	"title":"spring boot program idea4",
	"user":{
		"first":"hongwei",
		"last":"zhang"
	},
	"price":300
}

2. 局部更新
   doc中可以是已经存在的字段，这个时候就会更新已经存在的字段
   如果是不存在的字段，就是添加字段操作

post http://{{host}}:9200/liarbry/books/1/_update
{
	"doc":{
		"date":"2019-06-28 00:01:01"
	}
}

四、删除document

1. 删除document

delete http://{{host}}:9200/liarbry/books/1

2. 删除type

delete http://{{host}}:9200/liarbry/books

4. 删除index

delete http://{{host}}:9200/liarbry

五、查询document

查询是最复杂的，下面只是列出最简单的

1. 根据id来查询

get http://{{host}}:9200/liarbry/books/1

2. 批量获取

#batch query

GET /_mget
{
  "docs":[
    {
      "_index":"liarbry",
      "_type":"books",
      "_id":"1",
      "_source":["title","price"]
    }, 
    {
      "_index":"liarbry",
      "_type":"books",
      "_id":"AWujzBfklrzOujYjNVt4"
    }
  ]
}

#specified index/type

GET /liarbry/books/_mget
{
  "docs":[
    {"_id":"1"},
    {"_id":"AWujzBfklrzOujYjNVt4"}
  ]
}

#above shorthand

GET /liarbry/books/_mget
{
  "ids":["1","AWujzBfklrzOujYjNVt4"]
}

五、批量增删改

1. bulk operate scheme

{action:{metadata}}\n
{request body}\n
{action:{metadata}}\n
{request body}\n

2. action description

action	description
create	if not exists,create it
index	if not exists then create it. if exists then cover it
delete	delete document
update	partial update

3. example

POST /liarbry/books/_bulk
{"index":{"_id":"2"}}
{"title":"books2","price":10}
{"index":{"_id":"3"}}
{"title":"books3","price":30}