Updating Fields with Painless

Serverless Stack

You can also easily update fields. You access the original source for a field as ctx._source.<field-name>.

First, let’s look at the source data for a player by submitting the following request:

						GET hockey/_search
					{
  "query": {
    "term": {
      "_id": 1
    }
  }
}
		
	

To change player 1’s last name to hockey, simply set ctx._source.last to the new value:

						POST hockey/_update/1
					{
  "script": {
    "lang": "painless",
    "source": "ctx._source.last = params.last",
    "params": {
      "last": "hockey"
    }
  }
}
		
	

You can also add fields to a document. For example, this script adds a new field that contains the player’s nickname, hockey.

						POST hockey/_update/1
					{
  "script": {
    "lang": "painless",
    "source": """
      ctx._source.last = params.last;
      ctx._source.nick = params.nick
    """,
    "params": {
      "last": "gaudreau",
      "nick": "hockey"
    }
  }
}
		
	