Jens Wille created SOLR-7143:
--------------------------------
Summary: 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
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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