Boost Field

curl -XDELETE "http://localhost:9200/t"

curl -XPUT "http://localhost:9200/t" -d'
{
   "mappings": {
      "P": {
         "properties": {
            "parstr": {
               "type": "string"
            }
         }
      },
      "T": {
         "_parent": {
            "type": "P"
         },
         "_boost": {
            "name": "boosting",
            "null_value": 1
         },
         "properties": {
            "boosting": {
               "type": "double"
            },
            "str": {
               "type": "string"
            }
         }
      }
   }
}'



curl -XPOST "http://localhost:9200/t/P/1" -d'
{
    "parstr": "parent one"
}'

curl -XPOST "http://localhost:9200/t/P/2" -d'
{
    "parstr": "parent two"
}'

curl -XPOST "http://localhost:9200/t/P/3" -d'
{
    "parstr": "parent three"
}'


curl -XPOST "http://localhost:9200/t/T?parent=1" -d'
{
    "boosting": 1.0,
    "str": "one behind another stays the same"
}'

curl -XPOST "http://localhost:9200/t/T?parent=2" -d'
{
    "boosting": 2.0,
    "str": "one behind another stays the ugly"
}'

curl -XPOST "http://localhost:9200/t/T?parent=3" -d'
{
    "boosting": 1.0,
    "str": "one behind another stays the true"
}'


curl -XPOST "http://localhost:9200/t/P/_search?pretty=true" -d'
{
   "query": {
      "top_children": {
         "type": "T",
         "query": {
            "query_string": {
               "query": "one behind another"
            }
         }
      }
   }
}'

Function Score

curl -XDELETE "http://localhost:9200/t"

curl -XPUT "http://localhost:9200/t" -d'
{
   "mappings": {
      "P": {
         "properties": {
            "parstr": {
               "type": "string"
            }
         }
      },
      "T": {
         "_parent": {
            "type": "P"
         },
         "properties": {
            "boosting": {
               "type": "double"
            },
            "str": {
               "type": "string"
            }
         }
      }
   }
}'

curl -XPOST "http://localhost:9200/t/P/1" -d'
{
    "parstr": "parent one"
}'

curl -XPOST "http://localhost:9200/t/P/2" -d'
{
    "parstr": "parent two"
}'

curl -XPOST "http://localhost:9200/t/P/3" -d'
{
    "parstr": "parent three"
}'

curl -XPOST "http://localhost:9200/t/T?parent=1" -d'
{
    "boosting": 1.0,
    "str": "one behind another stays the same"
}'

curl -XPOST "http://localhost:9200/t/T?parent=2" -d'
{
    "boosting": 2.0,
    "str": "one behind another stays the ugly"
}'

curl -XPOST "http://localhost:9200/t/T?parent=3" -d'
{
    "boosting": 1.0,
    "str": "one behind another stays the true"
}'

curl -XPOST "http://localhost:9200/t/P/_search" -d'
{
   "query": {
      "top_children": {
         "type": "T",
         "query": {
            "function_score": {
               "query": {
                  "query_string": {
                     "query": "one behind another"
                  }
               },
               "functions": [
                  {
                     "script_score": {
                        "script": "_score * doc['boosting'].value"
                     }
                  }
               ],
               "score_mode": "multiply"
            }
         }
      }
   }
}'