# Issue (Bug?) with field\_value\_factor and Search Templates

**URL:** <https://discuss.elastic.co/t/issue-bug-with-field-value-factor-and-search-templates/19016>\
**Category:** Elasticsearch\
**Created:** [July 31, 2014, 9:59pm UTC](https://discuss.elastic.co/t/issue-bug-with-field-value-factor-and-search-templates/19016 "2014-07-31T21:59:07Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![germap](https://avatars.discourse-cdn.com/v4/letter/g/4da419/32.png) [@germap](https://discuss.elastic.co/u/germap)\
**Post date:** [July 31, 2014, 9:59pm UTC](https://discuss.elastic.co/t/issue-bug-with-field-value-factor-and-search-templates/19016/1 "2014-07-31T21:59:07Z")

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Hi,

I'm getting the following error message while attempting to use the Search  
Template (I use ES 1.3.1):

_nested: ElasticsearchException[Unable to find a field mapper for field  
[weight]_

I' m storing the template in the .script index as stated here [1]. The  
field 'weight' is used inside a field\_value\_factor (function\_score).

The query runs appropriately when not using a Search Template.

You can find a mapping, sample data, working query, sample template, and a  
not working template query at [2].  
Is that a bug?

I'd appreciate any help,

Germán

* * *

[1]  
[http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-template.html#\_filling\_in\_a\_query\_string\_with\_a\_single\_value](http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-template.html#_filling_in_a_query_string_with_a_single_value)  
[2] [https://titanpad.com/es-fvf-issue](https://titanpad.com/es-fvf-issue)

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 6, 2017, 1:11am UTC](https://discuss.elastic.co/t/issue-bug-with-field-value-factor-and-search-templates/19016/2 "2017-07-06T01:11:50Z")

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