Find and replace in elasticsearch all documents

Question

I wanted to replace the single username in all my elasticsearch index documents. Is there any API query ?

I tried searching multiple but couldn\'t find. Any one has

Answer 1

update-by-query is the way to go.

POST /test/movies/_update_by_query
{
  "script": {
    "inline": "ctx._source.user = 'alice'"
  },
  "query": {
    "term": {
      "user": "bob"
    }
  }
}

Note: make sure to enable dynamic scripting in order for this to work.