cql-ruby is a ruby gem for parsing CQL, and serializing parse trees back to CQL, to xCQL, or to a solr query.
A new version has been released, 0.8.0, available from gem update/install. “gem install cql-ruby”.
The new version improves greatly on the #to_solr serialization as a solr query, providing support for translation from more CQL relations than
previously, fixing a couple bugs, and making #to_solr raise appropriate exceptions if you try to convert CQL that is not supported for
That’s the only change from the previous version, improved #to_solr.
I wrote the improved #to_solr, Chick Markley wrote the original cql-ruby gem, which was a port of the Java CQL parsing code by Mike Taylor. Ain’t open source grand?
The reason I’m working on this is to provide cql query input to Blacklight, so I can have an “api” to Blacklight (cql in, atom out) that can be used by Umlaut. Making that work well in Blacklight takes a few steps beyond what cql-ruby to_solr does, but I’m nearly done with that too, more news as warranted.