es-nested-facets

curl -XDELETE 'http://localhost:9200/exp/'

#Create the index

curl -XPUT 'http://localhost:9200/exp/'

#Configure the mapping

curl -XPUT localhost:9200/exp/content/_mapping -d '
{
  "content": {
    "properties": {
      "contributors": {
        "type": "nested",
        "properties": {
          "contributorRole": {
            "type": "multi_field",
            "fields": {
              "contributorRole": {
                "type": "string",
                "index": "analyzed"
              },
              "untouched": {
                "type": "string",
                "index": "not_analyzed"
              }
            }
          }
        }
      },
      "identifiers": {
        "type": "nested",
        "properties": {
          "identifierType": {
            "type": "multi_field",
            "fields": {
              "identifierType": {
                "type": "string",
                "index": "analyzed"
              },
              "untouched": {
                "type": "string",
                "index": "not_analyzed"
              }
            }
          }
        }
      }
    }
  }
}'

#Index a doc

curl -X PUT "http://localhost:9200/exp/content/1" -d '
{
  "title": "Test Title",
  "contentType": "Test Content Type",
  "publisher": "Publisher",
  "contributors": [
    {
      "contributorRole": "contributor role 1",
      "contributorName": "Contributor 1"
    },
    {
      "contributorRole": "contributor role 2",
      "contributorName": "Contributor 2"
    }
  ],
  "identifiers": [
    {
      "identifierType": "Test Identifier Type 1",
      "identifierValue": "Test Identifier Value1"
    },
    {
      "identifierType": "Test Identifier Type 2",
      "identifierValue": "Test Identifier Value2"
    }
  ] 
}'

#Search and request facets
curl -X POST "http://localhost:9200/exp/content/_search?pretty=true" -d '
{
  "query": {
    "query_string": {
      "query": "test"
    }
  },
  "facets": {
    "contributors.contributorRole.untouched": {
      "terms": {
        "field": "contributors.contributorRole.untouched"
      },
      "nested": "contributors"
    },
    "identifiers.identifierType.untouched": {
      "terms": {
        "field": "identifiers.identifierType.untouched"
      },
      "nested": "identifiers"
    }
  }
}'