[SOLR-5313] json update extract boost from document value

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Won't Do
• Affects Version/s: 3.6
• Labels: boost document json solr update
• Assignee: Unassigned
• Reporter: Nicolas Franck
• Created: 08/Oct/13 12:11
• Updated: 27/Jun/19 15:15
• Resolved: 27/Jun/19 15:15

Description

The current JsonLoader in org.apache.solr.handler provides a way to add a boost to a document as a whole. But if you want to add multiple documents,
each with its own boost, you have to create something like this:

{
"add": { "boost":2.0, "doc": {} },
"add": { "boost":2.0, "doc": {} }
..
}

No idea which JSON-writer can do this (I use the one from perl,
that does not support duplicate keys).

Therefore I tried to alter some of the code in JsonLoader::handleAdds.
The code is between "//test - start" and "//test - end":

cmd.solrDoc = parseDoc(ev);

//test - start
if(boost_field != null){
SolrInputField b_field = cmd.solrDoc.getField(boost_field);
if(b_field != null)

{ log.info("boost_field found in document with value '"+b_field.getFirstValue()+"'"); float boost = Float.parseFloat((String)b_field.getFirstValue()); cmd.solrDoc.setDocumentBoost(boost); cmd.solrDoc.removeField(boost_field); }

}
//test - end

processor.processAdd(cmd);

In this code I try to extract the boost value for the document from the document itself. The default field is configured as "_boost", and is deleted
from the document afterwards.

I tried to subclass JsonLoader, but sadly the class is package-protected

Could this be an interesting contribution?