Find empty strings in elasticsearch

Question

I\'m trying to _search documents that has some specific value in the field.

{
  \"query\": {
      \"bool\": {
        \"must\": [
         {\"f         


        

Answer 1

Try using must_not with missing in your bool:

"must_not":{
  "missing":{
    "field":"advs.status",
    "existence":true,
    "null_value":true
  }
}