[SOLR-15112] SolrJ DocumentObjectBinder.toSolrInputDocument null handling

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 8.7
• Component/s: SolrJ
• Assignee: Unassigned
• Reporter: Alessandro Benedetti
• Created: 27/Jan/21 15:52
• Updated: 13/Feb/21 00:09

Description

Currently the:
org.apache.solr.client.solrj.beans.DocumentObjectBinder#toSolrInputDocument
method doesn't handle nulls in java objects very well.

Even if the field is null in the Java Object, the binder adds the field(with the null value) to the SolrInputDocument.

This may cause issues down the line, for example using UpdateRequestProcessors such as the UUIDUpdateProcessorFactory (which doesn't check the value of the field, but it just checks if a field is present)

The proposal here is to make the binder NOT add null fields to the SolrInputDocument.

Any objection is welcome (took this list of committers from some of the latest contributors to the class):
noble noble.paul erickerickericksonjpountz