Get specific fields from index in elasticsearch - elasticsearch

Question

I have an index in elastic-search.
Sample structure :
{
"Article": "Article7645674712",
"Genre": "Genre92231455",
"relationDesc": [
"Article",
"Genre"
],
"org": "user",
"dateCreated": {
"date": "08/05/2015",
"time": "16:22 IST"
},
"dateModified": "08/05/2015"
}
From this index i want to retrieve selected fields: org and dateModified.
I want result like this
{
"took": 265,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 28,
"max_score": 1,
"hits": [
{
"_index": "couchrecords",
"_type": "couchbaseDocument",
"_id": "3",
"_score": 1,
"_source": {
"doc": {
"org": "user",
"dateModified": "08/05/2015"
}
}
},
{
"_index": "couchrecords",
"_type": "couchbaseDocument",
"_id": "4",
"_score": 1,
"_source": {
"doc": {
"org": "user",
"dateModified": "10/05/2015"
}
}
}
]
}
}
How to query elastic-search to get only selected specific fields ?

Answer 1

You can retrieve only a specific set of fields in the result hits using the _source parameter like this:
curl -XGET localhost:9200/couchrecords/couchbaseDocument/_search?_source=org,dateModified
Or in this format:
curl -XPOST localhost:9200/couchrecords/couchbaseDocument/_search -d '{
"_source": ["doc.org", "doc.dateModified"], <---- you just need to add this
"query": {
"match_all":{} <----- or whatever query you have
}
}'

Answer 2

That's easy. Considering any query of this format :
{
"query": {
...
},
}
You'll just need to add the fields field into your query which in your case will result in the following :
{
"query": {
...
},
"fields" : ["org","dateModified"]
}

Answer 3

{
"_source" : ["org","dateModified"],
"query": {
...
}
}
Check ElasticSearch source filtering.