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https://issues.apache.org/jira/browse/SOLR-1695?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12835381#action_12835381
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Yonik Seeley commented on SOLR-1695:
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bq. ...it doesn't require "id" but it does declare "id" as the uniqueKey field
... even if it's allowing dups shouldn't it ensure that the docs has 1 and only
one value for the uniqueKey field?
That depends... it makes sense for "normal" documents, but I've seen people
that add a few auxillary documents to their index that used different fields,
including the id field. But it's not like you gain greater power by allowing
that - those usecases could be covered by forcing the user to come up with a
uniqueKey value too... it would just be a little more work.
> Missleading error message when adding docs with missing/multiple value(s)
> for uniqueKey field
> ----------------------------------------------------------------------------------------------
>
> Key: SOLR-1695
> URL: https://issues.apache.org/jira/browse/SOLR-1695
> Project: Solr
> Issue Type: Improvement
> Reporter: Hoss Man
> Assignee: Hoss Man
> Priority: Minor
> Fix For: 1.5
>
>
> Sometimes users don't seem to notice/understand the <uniqueKey/> declaration
> in the example schema, and the error message they get if their documents
> don't include that field is confusing...
> {code}
> org.apache.solr.common.SolrException: Document [null] missing required field:
> id
> {code}
> ...because they get an almost identical error even if they remove
> {{required=true}} from {{<field name="id" />}} in their schema.xml file.
> We should improve the error message so it's clear when a Document is missing
> the "uniqueKeyField" (not just a "required" field) so they know the
> terminology to look for in diagnosing the problem.
> http://old.nabble.com/solr-1.4-csv-import-----Document-missing-required-field%3A-id-to26990048.html#a26990779
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