Elastic Search parent with same type - elasticsearch

Question

Sorry if this is a duplicate (I did try searching), or if this is a silly question. New to posting questions.
I am trying to do parent child relations and queries in ElasticSearch with the following:
#!/bin/bash
curl -XDELETE 'http://localhost:9200/test/'
echo
curl -XPUT 'http://localhost:9200/test/' -d '{
"settings" : {
"index" : {
"number_of_shards" : 1
}
}
}'
echo
curl -XPUT localhost:9200/test/_mapping/nelement -d '{
"nelement" : {
"_id" : { "path" : "nid", "store" : true, "index" : "not_analyzed"},
"_parent" : { "type" : "nelement"},
"properties" : {
"name" : { "type" : "string", "index" : "not_analyzed" },
"nid": { "type" : "string", "copy_to" : "_id" }
}
}
}'
echo
#curl -s -XPOST localhost:9200/_bulk --data-binary #test_data.json
test_data.json is as follows:
{"index":{"_index":"test","_type":"element", "_parent":"abc"}
{"nid":"1a","name":"parent1"}
{"index":{"_index":"test","_type":"element", "_parent":"1a"}
{"nid":"2b","name":"child1"}
{"index":{"_index":"test","_type":"element", "_parent":"2b"}
{"nid":"2c","name":"child2"}
curl -XGET 'localhost:9200/test/nelement/_search?pretty=true' -d '{
"query": {
"has_child": {
"child_type": "nelement",
"query": {
"match": {
"nid": "2c"
}
}
}
}
}'
echo
echo
curl -XGET 'localhost:9200/test/nelement/_search?pretty=true' -d '{
"query": {
"has_parent": {
"type": "nelement",
"query": {
"term": {
"nid": "2b"
}
}
}
}
}'
For some reason, my search queries get no results. I have confirmed that the objects are indexed....

Answer 1

Because you are using self referential(set parent and query in the same index type) to parent/child query.
For now Elasticsearch is not supporting it.
Explore parent/child self referential support