Best way to check if a field exist in an Elasticsearch document

Question

May be is a very stupid question, What is the best way to check if a field of a document in elasticsearch exists? I can\'t find anything in the documentation.

For ex

Answer 1

You can use exists filter:

{
  "query": {
    "filtered": {
      "filter": {
        "exists": {
          "field": "status"
        }
      },
      "query": {
        "match_all": {}
      }
    }
  }
}

Regards, Alain