ES Docs-3：Modifying Data

Modifying Data

Indexing/Replacing Documents

curl -XPUT 'localhost:9200/customer/external/1?pretty' -d '
{
  "name": "John Doe"
}'

If we then executed the above command again with a different (or same) document, Elasticsearch will replace (i.e. reindex) a new document on top of the existing one with the ID of 1

curl -XPUT 'localhost:9200/customer/external/1?pretty' -d '
{
  "name": "Micheal"
}'

If, on the other hand, we use a different ID, a new document will be indexed and the existing document(s) already in the index remains untouched.

we are using the POST verb instead of PUT since we didn’t specify an ID.

curl -XPOST 'localhost:9200/customer/external?pretty' -d '
{
  "name": "Jane Doe"
}'

Updating Documents

This example shows how to update our previous document (ID of 1) by changing the name field to "Jane Doe":

改变name field

curl -XPOST 'localhost:9200/customer/external/1/_update?pretty' -d '
{
  "doc": { "name": "Jane Doe" }
}'

添加age field

curl -XPOST 'localhost:9200/customer/external/1/_update?pretty' -d '
{
  "doc": { "name": "Jane Doe", "age": 20 }
}'

脚本更新(失败)

curl -XPOST 'localhost:9200/customer/external/1/_update?pretty' -d '
{
  "script" : "ctx._source.age += 5"
}'

返回

{
  "error" : {
    "root_cause" : [ {
      "type" : "remote_transport_exception",
      "reason" : "[es_node_1][127.0.0.1:9300][indices:data/write/update[s]]"
    } ],
    "type" : "illegal_argument_exception",
    "reason" : "failed to execute script",
    "caused_by" : {
      "type" : "script_exception",
      "reason" : "scripts of type [inline], operation [update] and lang [groovy] are disabled"
    }
  },
  "status" : 400
}

Deleting Documents

根据ID删除Doc

es@qiandu1-yuwencai:~/cluster/elasticsearch-2.3.1$ curl -XDELETE 'localhost:9200/customer/external/2?pretty'

返回

{
  "found" : true,
  "_index" : "customer",
  "_type" : "external",
  "_id" : "2",
  "_version" : 2,
  "_shards" : {
    "total" : 2,
    "successful" : 1,
    "failed" : 0
  }
}

The delete-by-query plugin can delete all documents matching a specific query.

Batch Processing

_bulk API

curl -XPOST 'localhost:9200/customer/external/_bulk?pretty' -d '
{"index":{"_id":"1"}}
{"name": "John Doe" }
{"index":{"_id":"2"}}
{"name": "Jane Doe" }
'

返回

{
  "took" : 17,
  "errors" : false,
  "items" : [ {
    "index" : {
      "_index" : "customer",
      "_type" : "external",
      "_id" : "1",
      "_version" : 5,
      "_shards" : {
        "total" : 2,
        "successful" : 1,
        "failed" : 0
      },
      "status" : 200
    }
  }, {
    "index" : {
      "_index" : "customer",
      "_type" : "external",
      "_id" : "2",
      "_version" : 1,
      "_shards" : {
        "total" : 2,
        "successful" : 1,
        "failed" : 0
      },
      "status" : 201
    }
  } ]
}

当然，也可以进行索引的更新和删除操作，不过删除操作没有参数

{"update":{"_id":"1"}}
{"doc": { "name": "John Doe becomes Jane Doe" } }
{"delete":{"_id":"2"}}

This functionality is important in that it provides a very efficient mechanism to do multiple operations as fast as possible with as little network roundtrips as possible.

The bulk API executes all the actions sequentially and in order. If a single action fails for whatever reason, it will continue to process the remainder of the actions after it. When the bulk API returns, it will provide a status for each action (in the same order it was sent in) so that you can check if a specific action failed or not.

参考资料

来源： https://www.elastic.co/guide/en/elasticsearch/reference/current/_batch_processing.html