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https://issues.apache.org/jira/browse/SOLR-15044?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17362393#comment-17362393
 ] 

ASF subversion and git services commented on SOLR-15044:
--------------------------------------------------------

Commit 5a9a34daedb34cb5fc5dc6f8c5c40a734bb7dacb in solr's branch 
refs/heads/main from David Smiley
[ https://gitbox.apache.org/repos/asf?p=solr.git;h=5a9a34d ]

SOLR-15044: JSON Loading: nested docs don't need ID (#143)

When indexing nested docs via JSON, it is no longer necessary to provide child 
doc IDs.
This was already working for XML & "javabin"/SolrJ.
Previously, omitting the ID would be confused for a partial/atomic update.

> Update JSON syntax: detect nested documents via schema
> ------------------------------------------------------
>
>                 Key: SOLR-15044
>                 URL: https://issues.apache.org/jira/browse/SOLR-15044
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: David Smiley
>            Assignee: David Smiley
>            Priority: Major
>              Labels: NestedDocuments
>             Fix For: main (9.0)
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> When sending JSON formatted documents to Solr, particularly to 
> /update/json/commands instead of /update/json/docs (those are API v2 paths), 
> it tries to differentiate between wether a nested structure is either a 
> nested document or an atomic update -- it's rather ambiguous.  Presently the 
> logic is simply checking for the presence of an "id" but it may not be there 
> (it is auto-computed when absent later).  It ought to simply look in the 
> schema to see if the field exists or not.  If it doesn't, then it can't be an 
> atomic update, thus treat it as a nested document.
> This was raised [on this comment in another JIRA 
> issue|https://issues.apache.org/jira/browse/SOLR-12362?focusedCommentId=16526338&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16526338].



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