Carrot2 dcs php example class modification

Question

I currently have solr and carrot2 configured and working on my server. I am using the dcs example class for php provided in the DCS download from project.carrot2.org . For reference the class can be found here https://github.com/amoghtolay/clustering/blob/master/carrot2-dcs-3.6.2/examples/php5/

I have tried a few things to modify the query to descending order and alter the number of records returned. The query used from a browser that give the results I need is q=*:*&sort=_docid_%20desc&rows=20. Although when I alter the query by altering the equivalent to line 35 in example.php found in link above to match the query I need I get the following error message "An error occurred during processing: HTTP error occurred, error code: 500" having the query only set to *:* works fine but it not the information needed. Also, source is set to solr.

Could anyone provide some assistance in getting this working, thanks.

Answer 1

If you'd like to pass some extra parameters to the Solr request URL, you'll need need to append them to the SolrDocumentSource.serviceUrlBase attribute. You can specify the number of results using the results attribute.