# Question on function score script
**URL:** https://discuss.elastic.co/t/question-on-function-score-script/15773
**Category:** Elasticsearch
**Created:** [February 13, 2014, 7:54am UTC](https://discuss.elastic.co/t/question-on-function-score-script/15773 "2014-02-13T07:54:11Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Amit\_Soni](https://discuss.elastic.co/u/Amit_Soni)
#### Post date: [February 13, 2014, 7:54am UTC](https://discuss.elastic.co/t/question-on-function-score-script/15773/1 "2014-02-13T07:54:11Z")
Hi everyone - I am facing an error when executing a function score query
and just wanted to get your comments on the same.
This is the script:
"script\_score": {
"script": "doc['boostValue'].value \>0 ? ( \_score \*
doc['boostValue'].value ) : \_score"
}
It primarily says that if the boostValue is positive, then multiply \_score
by it else use \_score as is. The error I get is below:
reason: QueryPhaseExecutionException[[index\_type\_1][0]: query[function
score (filtered(website:bank
name:bank)-\>cache(region:US),function=script[doc['boostValue'].value \>0 ? (
\_score \* doc['boostValue'].value ) : \_score], params
[null])],from[0],size[5]: Query Failed [Failed to execute main query]];
nested: PropertyAccessException[[Error: could not access: value; in class:
org.elasticsearch.index.fielddata.ScriptDocValues$Empty] [Near : {...
doc['boostValue'].value \>0 ? ( ....}] ^ [Line: 1, Column: 1]];
Any thoughts?
-Amit.
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### Author:  [@spinscale](https://discuss.elastic.co/u/spinscale)
#### Post date: [February 13, 2014, 9:26am UTC](https://discuss.elastic.co/t/question-on-function-score-script/15773/2 "2014-02-13T09:26:33Z")
Hey,
most likely some document which matched your query does not contain the
field boostValue...
--Alex
On Thu, Feb 13, 2014 at 8:54 AM, Amit Soni [amitsoni29@gmail.com](mailto:amitsoni29@gmail.com) wrote:
> Hi everyone - I am facing an error when executing a function score query
> and just wanted to get your comments on the same.
>
> This is the script:
> "script\_score": {
> "script": "doc['boostValue'].value \>0 ? ( \_score \*
> doc['boostValue'].value ) : \_score"
> }
>
> It primarily says that if the boostValue is positive, then multiply \_score
> by it else use \_score as is. The error I get is below:
>
> reason: QueryPhaseExecutionException[[index\_type\_1][0]: query[function
> score (filtered(website:bank
> name:bank)-\>cache(region:US),function=script[doc['boostValue'].value \>0 ? (
> \_score \* doc['boostValue'].value ) : \_score], params
> [null])],from[0],size[5]: Query Failed [Failed to execute main query]];
> nested: PropertyAccessException[[Error: could not access: value; in class:
> org.elasticsearch.index.fielddata.ScriptDocValues$Empty] [Near : {...
> doc['boostValue'].value \>0 ? ( ....}] ^ [Line: 1, Column: 1]];
>
> Any thoughts?
>
> -Amit.
>
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### Author:  [@Binh\_Ly](https://discuss.elastic.co/u/Binh_Ly)
#### Post date: [February 13, 2014, 1:02pm UTC](https://discuss.elastic.co/t/question-on-function-score-script/15773/3 "2014-02-13T13:02:01Z")
And you can test for it if needed:
doc['boostValue'].isEmpty()
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### Author:  [@Amit\_Soni](https://discuss.elastic.co/u/Amit_Soni)
#### Post date: [February 14, 2014, 3:55am UTC](https://discuss.elastic.co/t/question-on-function-score-script/15773/4 "2014-02-14T03:55:02Z")
thanks Alex and Binh. I tried with isEmpty() check and it worked fine.
-Amit.
On Thu, Feb 13, 2014 at 5:02 AM, Binh Ly [binh@hibalo.com](mailto:binh@hibalo.com) wrote:
> And you can test for it if needed:
>
> doc['boostValue'].isEmpty()
>
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 1:50am UTC](https://discuss.elastic.co/t/question-on-function-score-script/15773/5 "2017-07-06T01:50:18Z")