Discovery errors out if an item has multiple 'dc.date.accessioned' values
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Key: DS-997
URL: https://jira.duraspace.org/browse/DS-997
Project: DSpace
Issue Type: Bug
Components: Discovery, Solr
Affects Versions: 1.8.0
Reporter: Tim Donohue
Priority: Major
Here's how you can replicate this issue.
* Modify a single item such that it has two "dc.date.accessioned" values.
* Restart Tomcat/Solr (may not even be necessary)
In the Tomcat logs you will see errors like:
Aug 17, 2011 12:54:18 PM org.apache.solr.common.SolrException log
SEVERE: org.apache.solr.common.SolrException: can not sort on multivalued
field: dc.date.accessioned_dt
at
org.apache.solr.schema.SchemaField.checkSortability(SchemaField.java:154)
This error seems to cause the Item to no longer be available from Discovery or
the UI in general.
Although most items in DSpace should only ever have one 'dc.date.accessioned',
it still is not impossible to have multiple values. If you import any item
which already has an existing 'dc.date.accessioned' value (for whatever
reason), DSpace will keep that value & also add a new one representing the new
DSpace Accession Date (see the InstallItem class).
In general, if possible, it'd be best for Discovery to not assume a single
value for any 'dc.date' fields.
This same issue also occurs if you manually add a second 'dc.date.issued'
value. You'll see similar errors stating "can not sort on multivalued field:
dc.date.issued.year".
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