Highlighting attachments

If you want to highlight your attachment content, you will need to set "store": true and "term_vector":"with_positions_offsets" for your attachment field. Here is a full script which does it:

DELETE /test
PUT /test
PUT /test/person/_mapping
{
  "person": {
    "properties": {
      "file": {
        "type": "attachment",
        "fields": {
          "content": {
            "type": "string",
            "term_vector":"with_positions_offsets",
            "store": true
          }
        }
      }
    }
  }
}
PUT /test/person/1?refresh=true
{
  "file": "IkdvZCBTYXZlIHRoZSBRdWVlbiIgKGFsdGVybmF0aXZlbHkgIkdvZCBTYXZlIHRoZSBLaW5nIg=="
}
GET /test/person/_search
{
  "fields": [],
  "query": {
    "match": {
      "file.content": "king queen"
    }
  },
  "highlight": {
    "fields": {
      "file.content": {
      }
    }
  }
}

It gives back:

{
   "took": 9,
   "timed_out": false,
   "_shards": {
      "total": 1,
      "successful": 1,
      "failed": 0
   },
   "hits": {
      "total": 1,
      "max_score": 0.13561106,
      "hits": [
         {
            "_index": "test",
            "_type": "person",
            "_id": "1",
            "_score": 0.13561106,
            "highlight": {
               "file.content": [
                  "\"God Save the <em>Queen</em>\" (alternatively \"God Save the <em>King</em>\"\n"
               ]
            }
         }
      ]
   }
}