Parent/child queries in ElasticSearch

gistfile1.json

curl -XPUT localhost:9200/authors/bare_author/1 -d'{
  "name": "Multi G. Enre"
}'

curl -XPUT localhost:9200/authors/bare_author/2 -d'{
  "name": "Alastair Reynolds"
}'

curl -XPOST localhost:9200/authors/book/_mapping -d '{
  "book":{
    "_parent": {"type": "bare_author"}
  }
}'

curl -XPOST localhost:9200/authors/book/1?parent=2 -d '{
   "name": "Revelation Space",
   "genre": "scifi",
   "publisher": "penguin"
}'

curl -XPOST localhost:9200/authors/book/2?parent=1 -d '{
   "name": "Guns and lasers",
   "genre": "scifi",
   "publisher": "orbit"
}'

curl -XPOST localhost:9200/authors/book/3?parent=1 -d '{
   "name": "Dead in the night",
   "genre": "thriller",
   "publisher": "penguin"
}'

curl -XPOST localhost:9200/authors/bare_author/_search -d '{
  "query": {
    "has_child": {
      "type": "book",
      "query" : {
        "filtered": {
          "query": { "match_all": {}},
          "filter" : {
            "and": [
              {"term": {"publisher": "penguin"}},
              {"term": {"genre": "scifi"}}
            ]
          }
        }
      }
    }
  }
}'