vatu...@yandex.ru wrote: > Hello. I work with Solr 4.10. > I use DIH and some custom java Transformers to synchronize my Solr index with > the database (MySQL is used) > Is there any way to change the fields in root entity from the sub entity?
I don't think that works, but if you are writing your own transformer, you should be able to associate the transformer with the parent and run your sub-entity query from within the transformer. You may also want to look at using a ScriptTransformer to avoid writing Java code that needs to be compiled outside of the DIH. Also, the main benefit of DIH is simplicity - it doesn't multi-thread well, it doesn't have a well-behaved cand it cannot choose any SolrCloud node when pushing data. If you are already writing transformers in Java, you may want to look at separating your transformations from Java to take advantage of at least multi-threading, and even multiple machines (e.g. big data). I guess it all depends on how much DIH you have, and how much you've invested in it. -----Original Message----- From: vatuska [mailto:vatu...@yandex.ru] Sent: Friday, September 04, 2015 6:49 AM To: solr-user@lucene.apache.org Subject: Solr DIH sub entity I mean something like this public class MySubEntityTransformer extends org.apache.solr.handler.dataimport.Transformer { @Override public Object transformRow(Map<String, Object> row, Context context) { Map<String, Object> parentRow = context.getParentContext().....? Object val = row.get("subEnityColumn"); if (val != null) { //transform this value some way Object generalValue = parentRow.get("documentField"); if (generalValue != null) { parentRow.put("documentField", generalValue + "_" + val); } else { parentRow.put("documentField", val); } } return row; } } Or is there any way to apply some kind of the transformation for the root entity after all its subentities has been processed? I can't use the script transformers, because they works many times slower than java extensions. -- View this message in context: http://lucene.472066.n3.nabble.com/Solr-DIH-sub-entity-tp4227167.html Sent from the Solr - User mailing list archive at Nabble.com.
