Spring Data for Apache Solr Extended DisMax Parameters

Question

I am trying to add the params below (qf,bq) in a Solr query generated by Spring Data Solr.

Solr parameters are :

qf => Spring Data Solr Method?
bq => Spring Data Solr Method?

I was able to find the methods below

fq => addFilterQuery
fl => addProjectionOnField
defType => setDefType
qt => setRequestHandler

I saw an open issue qf https://jira.spring.io/browse/DATASOLR-153

How can i add the qf and bq params to Solr query built with Spring Data Solr.

Thanks

Answer 1

You can use the SolrCallback on template level to access the SolrClient and execute the query from there or register your own QueryParser for a custom query type.

Maybe something like:

@Bean
public SolrTemplate solrTemplate(SolrClient client) {

    SolrTemplate template = new SolrTemplate(client);
    template.registerQueryParser(EdismaxQuery.class, new EdisMaxQueryParser());
    return template;
}

class EdismaxQuery extends SimpleQuery {
    // ... add stuff you need. Maybe `autoRelax`
}

class EdisMaxQueryParser extends QueryParserBase<EdismaxQuery> {

    DefaultQueryParser defaultQueryParser = new DefaultQueryParser();

    @Override
    public SolrQuery doConstructSolrQuery(EdismaxQuery source) {

        // just use the default parser to construct the query string in first place.
        SolrQuery target = defaultQueryParser.constructSolrQuery(source);

        // add missing parameters
        target.add("defType", "edismax");
        target.add("qf", source....);

        return target;
    }
}