Elasticsearch - get nested fields

Question

I want to get only nested fields, but cannot since it\'s not leaf fields.

GET index/_search
{
    \"size\": 10,
    \"fields\": [
       \"nested_fields\"
           


        

Answer 1

If you don't have a certain query that should match the nested fields somehow, you can do it like this:

GET /index/_search
{
  "size": 10,
  "_source": ["nested_fields.id", "nested_fields.name"]
}

If you also have a nested query and you want to return the nested docs that matched you can do it like this (with inner_hits):

{
  "query": {
    "nested": {
      "path": "nested_fields",
      "query": {"match_all": {}}, 
      "inner_hits": {}
    }
  }
}