Elasticsearch Function Score does not work with fields of object type.

func_scr_obj_test

DELETE test

POST test
{
  "settings": {
    "number_of_shards": 1,
    "index": {
      "number_of_replicas": "0"
    }
  },
  "mappings": {
    "tst": {
      "properties": {
        "name": {
          "type": "string"
        },
        "fsot": {
          "type": "object",
          "properties": {
            "testobj": {
              "type": "string"
            }
          }
        }
      }
    }
  }
}

POST test/tst/1
{
  
  "name": "t1",
  "fsot": [
    {
      "testobj": "test1"
    },
    {
      "testobj": "test2"
    }
  ]
}

GET test/tst/_search
GET test/tst/_mapping

POST test/tst/_search
{
  "query": {
    "function_score": {
      "boost_mode": "replace", 
      "query": {
        "filtered": {
          "query": {
            "match_all": {}
          },
          "filter": {
            "exists": {
              "field": "fsot"
            }
          }
        }
      },
      "functions": [
        {
          "script_score": {
            "script": "if ( doc.get('name') == null ) 0; else 1;"
          }
        }
      ]
    }
  }
}

POST test/tst/_search
{
  "query": {
    "function_score": {
      "boost_mode": "replace", 
      "query": {
        "filtered": {
          "query": {
            "match_all": {}
          },
          "filter": {
            "exists": {
              "field": "fsot"
            }
          }
        }
      },
      "functions": [
        {
          "script_score": {
            "script": "if ( doc.get('fsot') == null ) 0; else 1;"
          }
        }
      ]
    }
  }
}

{
   "error": "SearchPhaseExecutionException[Failed to execute phase [query_fetch], all shards failed; shardFailures {[nhZxfl9HQOqWPEhSluWnGg][test][0]: QueryPhaseExecutionException[[test][0]: query[filtered(function score (ConstantScore(cache(BooleanFilter(_field_names:fsot.testobj))), functions: [{filter(*:*), function [script[if ( doc.get('fsot') == null ) 0; else 1;], params [null]]}]))->cache(_type:tst)],from[0],size[10]: Query Failed [Failed to execute main query]]; nested: PropertyAccessException[[Error: doc.get('fsot'): No field found for [fsot] in mapping with types [tst]]\n[Near : {... if ( doc.get('fsot') == null ) ....}]\n             ^\n[Line: 1, Column: 1]]; nested: InvocationTargetException; nested: ElasticsearchIllegalArgumentException[No field found for [fsot] in mapping with types [tst]]; }]",
   "status": 500
}

[2014-08-24 22:55:58,510][DEBUG][action.search.type       ] [Gabe Jones] [test][0], node[nhZxfl9HQOqWPEhSluWnGg], [P], s[STARTED]: Failed to execute [org.elasticsearch.action.search.SearchRequest@6661b3ef]
org.elasticsearch.search.query.QueryPhaseExecutionException: [test][0]: query[filtered(function score (ConstantScore(cache(BooleanFilter(_field_names:fsot.testobj))), functions: [{filter(*:*), function [script[if ( doc.get('fsot') == null ) 0; else 1;], params [null]]}]))->cache(_type:tst)],from[0],size[10]: Query Failed [Failed to execute main query]
	at org.elasticsearch.search.query.QueryPhase.execute(QueryPhase.java:162)
	at org.elasticsearch.search.SearchService.executeFetchPhase(SearchService.java:334)
	at org.elasticsearch.search.action.SearchServiceTransportAction$11.call(SearchServiceTransportAction.java:308)
	at org.elasticsearch.search.action.SearchServiceTransportAction$11.call(SearchServiceTransportAction.java:305)
	at org.elasticsearch.search.action.SearchServiceTransportAction$23.run(SearchServiceTransportAction.java:517)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
Caused by: [Error: doc.get('fsot'): No field found for [fsot] in mapping with types [tst]]
[Near : {... if ( doc.get('fsot') == null ) ....}]
             ^
[Line: 1, Column: 1]
	at org.elasticsearch.common.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:413)
	at org.elasticsearch.common.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(ReflectiveAccessorOptimizer.java:140)
	at org.elasticsearch.common.mvel2.optimizers.dynamic.DynamicOptimizer.optimizeAccessor(DynamicOptimizer.java:68)
	at org.elasticsearch.common.mvel2.ast.ASTNode.optimize(ASTNode.java:159)
	at org.elasticsearch.common.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:115)
	at org.elasticsearch.common.mvel2.ast.BinaryOperation.getReducedValueAccelerated(BinaryOperation.java:114)
	at org.elasticsearch.common.mvel2.compiler.ExecutableAccessor.getValue(ExecutableAccessor.java:38)
	at org.elasticsearch.common.mvel2.ast.IfNode.getReducedValueAccelerated(IfNode.java:73)
	at org.elasticsearch.common.mvel2.MVELRuntime.execute(MVELRuntime.java:86)
	at org.elasticsearch.common.mvel2.compiler.CompiledExpression.getDirectValue(CompiledExpression.java:123)
	at org.elasticsearch.common.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:119)
	at org.elasticsearch.common.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:113)
	at org.elasticsearch.script.mvel.MvelScriptEngineService$MvelSearchScript.run(MvelScriptEngineService.java:196)
	at org.elasticsearch.script.mvel.MvelScriptEngineService$MvelSearchScript.runAsDouble(MvelScriptEngineService.java:211)
	at org.elasticsearch.common.lucene.search.function.ScriptScoreFunction.score(ScriptScoreFunction.java:54)
	at org.elasticsearch.common.lucene.search.function.FiltersFunctionScoreQuery$CustomBoostFactorScorer.score(FiltersFunctionScoreQuery.java:320)
	at org.apache.lucene.search.TopScoreDocCollector$OutOfOrderTopScoreDocCollector.collect(TopScoreDocCollector.java:140)
	at org.apache.lucene.search.Weight$DefaultBulkScorer.scoreAll(Weight.java:193)
	at org.apache.lucene.search.Weight$DefaultBulkScorer.score(Weight.java:163)
	at org.apache.lucene.search.BulkScorer.score(BulkScorer.java:35)
	at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:621)
	at org.elasticsearch.search.internal.ContextIndexSearcher.search(ContextIndexSearcher.java:175)
	at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:491)
	at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:448)
	at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:281)
	at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:269)
	at org.elasticsearch.search.query.QueryPhase.execute(QueryPhase.java:156)
	... 7 more
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.GeneratedMethodAccessor13.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.elasticsearch.common.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:1097)
	at org.elasticsearch.common.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:980)
	at org.elasticsearch.common.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:340)
	... 33 more
Caused by: org.elasticsearch.ElasticsearchIllegalArgumentException: No field found for [fsot] in mapping with types [tst]
	at org.elasticsearch.search.lookup.DocLookup.get(DocLookup.java:103)
	... 39 more
[2014-08-24 22:55:58,511][DEBUG][action.search.type       ] [Gabe Jones] All shards failed for phase: [query_fetch]