elasticsearch upsert 问题

Question

elasticsearch 新手遇到了小问题：

首先我创建了一个文档：

curl -XPOST http://localhost:9200/blog/article/ -d '{"title":"new version of Elasticsearch released!", "countent":"version 1.0 released today!", "tags":["announce","elasticsearch","release"]}'

然后返回：

{"_index":"blog","_type":"article","_id":"AV05vk4Jp9eqwTx-9EmQ","_version":1,"result":"created","_shards":{"total":2,"successful":1,"failed":0},"created":true}

这个是创建成功了的，然后我尝试使用 upsert 功能：

curl -XPOST http://localhost:9200/blog/article/AV05vk4Jp9eqwTx-9EmQ/_update -d '{"script":"ctx._source.count += 1", "upsert":{"count":0}}'

按照书上敲得，预期是将 count 字段加1，若是不存在，则插入 count 字段并设置为 0，但是报错了：

{"error":{"root_cause":[{"type":"remote_transport_exception","reason":"[neil-1][10.142.14.160:9300][indices:data/write/update[s]]"}],"type":"illegal_argument_exception","reason":"failed to execute script","caused_by":{"type":"script_exception","reason":"runtime error","script_stack":["ctx._source.count += 1","                     ^---- HERE"],"script":"ctx._source.count += 1","lang":"painless","caused_by":{"type":"null_pointer_exception","reason":null}}},"status":400}

求问这是什么原因

Answer 1

可能你看的是老版本，不同版本使用都不同，官网针对每个版本有教程

Answer 2

curl -XPOST http://localhost:9200/blog/article/AV05vk4Jp9eqwTx-9EmQ/_update -d '{"script":{"inline":"ctx._source.counter += params.count","lang":"painless","params":{"count":4}},"upsert":{"counter":1}}'

这样就 ok 啦

Answer 3

6.6.1

{
    "script" : "ctx._source.new_field = 'value_of_new_field'"
}