Not clear how to upsert ElasticSearch using python elasticsearch

Question

Look here for a similar example:

https://stackoverflow.com/a/33247409/1575066

from elasticsearch import Elasticsearch
es = Elasticsearch("localhost:9200")
es.update(index='test',doc_type='test1',id='1',body={'doc' {'username':'Tom'},'doc_as_upsert':True})

But now imagine the goal is to append to an array or to increment a previous value (without having to get the document first).

If you go with official requests, this is in the documentation :

POST /website/pageviews/1/_update
{
   "script" : "ctx._source.views+=1",
   "upsert": {
       "views": 1
   }
}

I was wondering how to accomplish appending to an array (just simply adding to a default list). It appeared elasticsearch's own examples are easier than anything I can find specifically for Python.

I read a post before about people just using python requests for doing elasticsearch stuff, and I'm thinking there might be a point to it...

Answer 1

You can put your script inside the body parameter.

from elasticsearch import Elasticsearch

es = Elasticsearch()

es.update(
    index="test",
    doc_type="test1",
    id="1",
    body={"script": "ctx._source.tags+=new_tag",
          "params": {
             "new_tag" : "search"
            }
          }
    )

More on update api

Here tags is an array and I am appending search to it. Also you need to enable scripting for this or you can put script in a file and put that file inside config/scripts folder. Syntax might be different depending on ES version. Let me know if it does not work.