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https://issues.apache.org/jira/browse/SOLR-11329?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eric Pugh resolved SOLR-11329.
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Resolution: Won't Fix
Per SOLR-17655, the recommendation for the future is to use in place updates
for numeric fields.
> contrib/ltr FieldValueFeature is silently 0.0 for external file fields
> ----------------------------------------------------------------------
>
> Key: SOLR-11329
> URL: https://issues.apache.org/jira/browse/SOLR-11329
> Project: Solr
> Issue Type: Bug
> Components: contrib - LTR
> Affects Versions: 6.6
> Reporter: Christine Poerschke
> Priority: Minor
>
> By observation
> {code}
> {
> "name" : "popularityScoreAsFieldValueFeature",
> "class" : "org.apache.solr.ltr.feature.FieldValueFeature",
> "params" : { "field" : "popularity_score" }
> }
> {code}
> returns a score of 0.0 for [external file
> fields|https://lucene.apache.org/solr/guide/6_6/working-with-external-files-and-processes.html]
> e.g.
> {code}
> <fieldType name="id2float" keyField="handle" defVal="0"
> class="solr.ExternalFileField" valType="float" />
> <field name="popularity_score" type="id2float" />
> {code}
> is schema content for the field.
> In comparison (and as a workaround of sorts)
> {code}
> {
> "name" : "popularityScoreAsSolrFeature",
> "class" : "org.apache.solr.ltr.feature.SolrFeature",
> "params" : { "q" : "{!func}field(popularity_score)" }
> }
> {code}
> returns the correct value.
> The [FieldValueFeature
> javadocs|http://lucene.apache.org/solr/6_6_0/solr-ltr/org/apache/solr/ltr/feature/FieldValueFeature.html]
> mention no restrictions re: fields needing to be non-external (or stored or
> indexed or whatever).
> ----
> Improvements that could be made under this ticket:
> * extend the javadocs to clarify what is and what is not supported
> * add (further) test cases for not supported scenarios
> * maybe: add support for external file fields
> * maybe: throw an exception or noisely log (instead of silently returning
> 0.0) in not supported scenarios
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