Fields are empty when doing GET in elastic4s - scala

Question

I'm trying to implement a service in my play2 app that uses elastic4s to get a document by Id.
My document in elasticsearch:
curl -XGET 'http://localhost:9200/test/venues/3659653'
{
"_index": "test",
"_type": "venues",
"_id": "3659653",
"_version": 1,
"found": true,
"_source": {
"id": 3659653,
"name": "Salong Anna och Jag",
"description": "",
"telephoneNumber": "0811111",
"postalCode": "16440",
"streetAddress": "Kistagången 12",
"city": "Kista",
"lastReview": null,
"location": {
"lat": 59.4045675,
"lon": 17.9502138
},
"pictures": [],
"employees": [],
"reviews": [],
"strongTags": [
"skönhet ",
"skönhet ",
"skönhetssalong"
],
"weakTags": [
"Frisörsalong",
"Frisörer"
],
"reviewCount": 0,
"averageGrade": 0,
"roundedGrade": 0,
"recoScore": 0
}
}
My Service:
#Singleton
class VenueSearchService extends ElasticSearchService[IndexableVenue] {
/**
* Elastic search conf
*/
override def path = "test/venues"
def getVenue(companyId: String) = {
val resp = client.execute(
get id companyId from path
).map { response =>
// transform response to IndexableVenue
response
}
resp
}
If I use getFields() on the response object I get an empty object. But if I call response.getSourceAsString I get the document as json:
{
"id": 3659653,
"name": "Salong Anna och Jag ",
"description": "",
"telephoneNumber": "0811111",
"postalCode": "16440",
"streetAddress": "Kistagången 12",
"city": "Kista",
"lastReview": null,
"location": {
"lat": 59.4045675,
"lon": 17.9502138
},
"pictures": [],
"employees": [],
"reviews": [],
"strongTags": [
"skönhet ",
"skönhet ",
"skönhetssalong"
],
"weakTags": [
"Frisörsalong",
"Frisörer"
],
"reviewCount": 0,
"averageGrade": 0,
"roundedGrade": 0,
"recoScore": 0
}
As you can se the get request omits info:
"_index": "test",
"_type": "venues",
"_id": "3659653",
"_version": 1,
"found": true,
"_source": {}
If I try to do a regular search:
def getVenue(companyId: String) = {
val resp = client.execute(
search in "test"->"venues" query s"id:${companyId}"
//get id companyId from path
).map { response =>
Logger.info("response: "+response.toString)
}
resp
}
I get:
{
"took": 2,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 1,
"max_score": 1,
"hits": [
{
"_index": "test",
"_type": "venues",
"_id": "3659653",
"_score": 1,
"_source": {
"id": 3659653,
"name": "Salong Anna och Jag ",
"description": "",
"telephoneNumber": "0811111",
"postalCode": "16440",
"streetAddress": "Kistagången 12",
"city": "Kista",
"lastReview": null,
"location": {
"lat": 59.4045675,
"lon": 17.9502138
},
"pictures": [],
"employees": [],
"reviews": [],
"strongTags": [
"skönhet ",
"skönhet ",
"skönhetssalong"
],
"weakTags": [
"Frisörsalong",
"Frisörer"
],
"reviewCount": 0,
"averageGrade": 0,
"roundedGrade": 0,
"recoScore": 0
}
}
]
}
}
My Index Service:
trait ElasticIndexService [T <: ElasticDocument] {
val clientProvider: ElasticClientProvider
def path: String
def indexInto[T](document: T, id: String)(implicit writes: Writes[T]) : Future[IndexResponse] = {
Logger.debug(s"indexing into $path document: $document")
clientProvider.getClient.execute {
index into path doc JsonSource(document) id id
}
}
}
case class JsonSource[T](document: T)(implicit writes: Writes[T]) extends DocumentSource {
def json: String = {
val js = Json.toJson(document)
Json.stringify(js)
}
}
and indexing:
#Singleton
class VenueIndexService #Inject()(
stuff...) extends ElasticIndexService[IndexableVenue] {
def indexVenue(indexableVenue: IndexableVenue) = {
indexInto(indexableVenue, s"${indexableVenue.id.get}")
}
Why is getFields empty when doing get?
Why is query info left out when doing getSourceAsString in a get request?
Thank you!

Answer 1

What you're hitting in question 1 is that you're not specifying which fields to return. By default ES will return the source and not fields (other than type and _id). See http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-fields.html
I've added a test to elastic4s to show how to retrieve fields, see:
https://github.com/sksamuel/elastic4s/blob/master/src%2Ftest%2Fscala%2Fcom%2Fsksamuel%2Felastic4s%2FSearchTest.scala
I am not sure on question 2.

Answer 2

The fields are empty because elasticsearch don't return it.
If you need fields, you must indicate in query what field you need:
this is you search query without field:
search in "test"->"venues" query s"id:${companyId}"
and in this query we indicate which field we want to, in this case 'name' and 'description':
search in "test"->"venues" fields ("name","description") query s"id:${companyId}"
now you can retrieve the fields:
for(x <- response.getHits.hits())
{
println(x.getFields.get("name").getValue)
You found a getSourceAsString in a get request because the parameter _source is to default 'on' and fields is to default 'off'.
I hope this will help you