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https://issues.apache.org/jira/browse/SOLR-4310?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13590108#comment-13590108
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Amit Nithian commented on SOLR-4310:
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Thanks! I'll take a look through this.. I will add some tests to see if I can
test for this. Right now I know that the test I added breaks with my patch and
passes if I remove the patch. Hitting the debugger I can see why but just
trying to make sure I understand the paths before changing something.
> If groups.ngroups is specified, the docList's numFound should be the number
> of groups
> -------------------------------------------------------------------------------------
>
> Key: SOLR-4310
> URL: https://issues.apache.org/jira/browse/SOLR-4310
> Project: Solr
> Issue Type: Improvement
> Components: search
> Affects Versions: 4.1
> Reporter: Amit Nithian
> Assignee: Hoss Man
> Priority: Minor
> Fix For: 4.2
>
> Attachments: SOLR-4310_2.patch, SOLR-4310.patch
>
>
> If you group by a field, the response may look like this:
> <lst name="grouped">
> <lst name="series">
> <int name="matches">138</int>
> <int name="ngroups">1</int>
> <result name="doclist" numFound="138" start="0">
> <doc>
> <int name="id">267038365</int>
> <str name="name">
> Larry's Grand Ole Garage Country Dance - Pure Country
> </str>
> </doc>
> </result>
> </lst>
> </lst>
> and if you specify group.main then the doclist becomes the result and you
> lose all context of the number of groups. If you want to keep your response
> format backwards compatible with clients (i.e. clients who don't know about
> the grouped format), setting group.main=true solves this BUT the numFound is
> the number of raw matches instead of the number of groups. This may have
> downstream consequences.
> I'd like to propose that if the user specifies ngroups=true then when
> creating the returning DocSlice, set the numFound to be the number of groups
> instead of the number of raw matches to keep the response consistent with
> what the user would expect.
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