# Unable to access doc\['field'\].value in script\_score
**URL:** https://discuss.elastic.co/t/unable-to-access-doc-field-value-in-script-score/73012
**Category:** Elasticsearch
**Created:** [January 27, 2017, 12:31pm UTC](https://discuss.elastic.co/t/unable-to-access-doc-field-value-in-script-score/73012 "2017-01-27T12:31:19Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@mv\_es](https://discuss.elastic.co/u/mv_es)
#### Post date: [January 27, 2017, 12:31pm UTC](https://discuss.elastic.co/t/unable-to-access-doc-field-value-in-script-score/73012/1 "2017-01-27T12:31:19Z")
I am trying to modify the score of my search results based on the value of two fields, namely "alexaRank" & "pubDate". I get the following **error:**
"caused\_by" : {
"type" : "missing\_property\_exception",
"reason" : "No such property: alexaRank for class: e5df54b64e7bd114a1f095ce63f339741dcb4f23"
}
**The query looks like the following:**
curl -XPOST 'localhost:9200/news\_cluster/\_search?pretty' -d '{
"explain": true, "query":{ "function\_score" : {
"query" : {
"multi\_match" : {
"query" : "News",
"fields" : ["title", "url", "description", "content^3"],
"type" : "phrase",
"slop" : 10,
"tie\_breaker" : 0.3
}
},
"functions" : [ {
"gauss" : {
"pubDate" : {
"scale" : "1d",
"decay" : 0.7
}
}
} ,
{
"script\_score" : { "params": {"constant": 100.0, "power": 0.25, "defaultRank": 10000.0} , "script":
"rank= doc['alexaRank'].value; score=(constant + defaultRank - rank)\*\*power; return score;",
"lang": "groovy" }} ],
"score\_mode" : "multiply",
"boost\_mode" : "multiply",
"boost" : 2.0
}
}}'
**The index mapping is as below:**
"mapping\_cluster" : {
"mappings" : {
"articles" : {
"properties" : {
"alexaRank" : {
"type" : "long"
},
"content" : {
"type" : "string"
},
"description" : {
"type" : "string"
},
"imageURL" : {
"type" : "string"
},
"pubDate" : {
"type" : "date",
"format" : "strict\_date\_optional\_time||epoch\_millis"
},
"sourceName" : {
"type" : "string"
},
"title" : {
"type" : "string"
},
"url" : {
"type" : "string"
}
}
}
}
}
Was wondering if somebody could help me figure out what the possible issue is? and how i could access the field to modify its score if this is not the right way.
I was thinking of using Function Score Query for this purpose initially, but don't know how i can use it to evaluate using the formula i am using currently (with the allowed modifiers).
Thanks!
---
### Author:  [@mv\_es](https://discuss.elastic.co/u/mv_es)
#### Post date: [January 27, 2017, 1:00pm UTC](https://discuss.elastic.co/t/unable-to-access-doc-field-value-in-script-score/73012/2 "2017-01-27T13:00:35Z")
Hi.
Resolved. The quotes were not being escaped.
changing doc['alexaRank'] to doc[' " ' "alexaRank" ' " '] solved the problem.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [February 24, 2017, 1:00pm UTC](https://discuss.elastic.co/t/unable-to-access-doc-field-value-in-script-score/73012/3 "2017-02-24T13:00:42Z")
This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.