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https://issues.apache.org/jira/browse/SOLR-5211?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16521999#comment-16521999
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Dr Oleg Savrasov commented on SOLR-5211:
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The patch is reworked according to the latest changes in DirectUpdateHandler2.
Added test for the case when update has child docs, but there is no _root_ in
schema. Personally, I'd prefer to move getLuceneDocument and
getLuceneDocsIfNested from AddUpdateCommand to DirectUpdateHandler2. I believe
that logic of documents conversion is not responsibility of the command, and
should be done by handler. Ready to rework the patch if needed.
> updating parent as childless makes old children orphans
> -------------------------------------------------------
>
> Key: SOLR-5211
> URL: https://issues.apache.org/jira/browse/SOLR-5211
> Project: Solr
> Issue Type: Sub-task
> Components: update
> Affects Versions: 4.5, 6.0
> Reporter: Mikhail Khludnev
> Assignee: Mikhail Khludnev
> Priority: Major
> Attachments: SOLR-5211.patch, SOLR-5211.patch, SOLR-5211.patch
>
>
> if I have parent with children in the index, I can send update omitting
> children. as a result old children become orphaned.
> I suppose separate \_root_ fields makes much trouble. I propose to extend
> notion of uniqueKey, and let it spans across blocks that makes updates
> unambiguous.
> WDYT? Do you like to see a test proves this issue?
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