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https://issues.apache.org/jira/browse/SOLR-7143?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14363554#comment-14363554
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Anshum Gupta commented on SOLR-7143:
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You've also added support for
bq. {!mlt qf=field1 qf=field2}
Let's not do this specifically for this issue but have wider support for multi
valued local params.
Also, parseLocalParamsSplitted returns a new String array but it should instead
just return null like getParam(paramName). Returning a non-null value always
ensures that the code flow never hits:
{code}
String[] qf = parseLocalParamsSplitted("qf"); // Never returns null
if (qf != null) { }
else { // Never gets here }
{code}
> MoreLikeThis Query Parser does not handle multiple field names
> --------------------------------------------------------------
>
> Key: SOLR-7143
> URL: https://issues.apache.org/jira/browse/SOLR-7143
> Project: Solr
> Issue Type: Bug
> Components: query parsers
> Affects Versions: 5.0
> Reporter: Jens Wille
> Assignee: Anshum Gupta
> Attachments: SOLR-7143.patch
>
>
> The newly introduced MoreLikeThis Query Parser (SOLR-6248) does not return
> any results when supplied with multiple fields in the {{qf}} parameter.
> To reproduce within the techproducts example, compare:
> {code}
> curl
> 'http://localhost:8983/solr/techproducts/select?q=%7B!mlt+qf=name%7DMA147LL/A'
> curl
> 'http://localhost:8983/solr/techproducts/select?q=%7B!mlt+qf=features%7DMA147LL/A'
> curl
> 'http://localhost:8983/solr/techproducts/select?q=%7B!mlt+qf=name,features%7DMA147LL/A'
> {code}
> The first two queries return 8 and 5 results, respectively. The third query
> doesn't return any results (not even the matched document).
> In contrast, the MoreLikeThis Handler works as expected (accounting for the
> default {{mintf}} and {{mindf}} values in SimpleMLTQParser):
> {code}
> curl
> 'http://localhost:8983/solr/techproducts/mlt?q=id:MA147LL/A&mlt.fl=name&mlt.mintf=1&mlt.mindf=1'
> curl
> 'http://localhost:8983/solr/techproducts/mlt?q=id:MA147LL/A&mlt.fl=features&mlt.mintf=1&mlt.mindf=1'
> curl
> 'http://localhost:8983/solr/techproducts/mlt?q=id:MA147LL/A&mlt.fl=name,features&mlt.mintf=1&mlt.mindf=1'
> {code}
> After adding the following line to
> {{example/techproducts/solr/techproducts/conf/solrconfig.xml}}:
> {code:language=XML}
> <requestHandler name="/mlt" class="solr.MoreLikeThisHandler" />
> {code}
> The first two queries return 7 and 4 results, respectively (excluding the
> matched document). The third query returns 7 results, as one would expect.
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