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From "Vitaliy Zhovtyuk (JIRA)" <>
Subject [jira] [Updated] (SOLR-7143) MoreLikeThis Query Parser does not handle multiple field names
Date Fri, 27 Feb 2015 15:52:43 GMT


Vitaliy Zhovtyuk updated SOLR-7143:
    Attachment: SOLR-7143.patch

Local parameters are not support multiple values syntax like: {!mlt qf=field1  qf=field2},
but qf list is required in MoreLikeThis. 
Added support for comma separated fields:  {!mlt qf=field1,field2}
Also comparing MLT handler query parser does not have any boost support on fields. This can
be extended in qf parameter syntax.

> MoreLikeThis Query Parser does not handle multiple field names
> --------------------------------------------------------------
>                 Key: SOLR-7143
>                 URL:
>             Project: Solr
>          Issue Type: Bug
>          Components: query parsers
>    Affects Versions: 5.0
>            Reporter: Jens Wille
>         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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