Thanks Mike. I have downloaded the source tarball for 4.1.0 and have tried to get it working, but am having a few problems getting it to fit with my environment (intelliJ / Maven). Where is the best forum to discuss such issues?
Chris -----Original Message----- From: Michael McCandless <luc...@mikemccandless.com> To: java-user@lucene.apache.org Sent: Tue, 12 Feb 2013 15:17 Subject: Re: More questions on BlockJoinQuery On Tue, Feb 12, 2013 at 7:43 AM, Chris Bamford <chris.bamf...@talktalk.net> wrote: >> Could you please send this to the java-user@lucene.apache.org list? > > I thought I did! :-) Here it is again: Duh, my bad :) You are right! I saw the "Hi Mike" and stopped there! Responses below: > I have a question about your post "Searching relational content with Lucene's > BlockJoinQuery" > (http://blog.mikemccandless.com/2012/01/searching-relational-content-with.html). > I am actually trying to use Lucene 4.0.0, so am having to translate your example to > the newer ToParentBlockJoinQuery / ToChildBlockJoinQuery APIs. I have had some success, > but my ultimate goal of combining the info from both child and parent hits is eluding > me. I suspect I am missing something, but as yet haven't figured out what! > > In this scenario, let's say I have the following relationship: > > child 1 : ref:"100", content:"child 1", type:"C" > child 2 : ref:"200", content:"child 2", type:"C" > child 3 : ref:"300", content:"child 3", type:"C" > parent : ref:"400", content:"parent", type:"P" > > When one or more children are hit, I want that to be noted against the parent, > so ultimately I can create a result object like: > > Result{ ref:400, content:"parent", matches: [100, 300] } // children 1 & 3 > were hit > > I have followed your example closely just replacing BlockJoinQuery with > ToParentBlockJoinQuery and BlockJoinCollector with ToParentBlockJoinCollector. > Unfortunately I seem to be able to get either: > > Just the parent objects (with td=s.search(q, 10)) or just the children (with the > Collector), but not both! > > Am I to call search() twice (one returning TopDocs and the other GroupDocs via > the Collector) and join them myself? Or does one of these calls return me both > types of documents, grouped and sorted? You should only call IndexSearcher.search once, but you should pass your ToParentBlockJoinCollector instance IS.search(query, collector), and then you call collector.getTopGroups to get the parent & children. Maybe have a look @ the unit test to get ideas? https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_1/lucene/join/src/test/org/apache/lucene/search/join/TestBlockJoin.java BTW you should upgrade to 4.1.0! Mike McCandless http://blog.mikemccandless.com --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
