Github user dsmiley commented on a diff in the pull request:
https://github.com/apache/lucene-solr/pull/416#discussion_r205465327
--- Diff:
solr/core/src/java/org/apache/solr/response/transform/ChildDocTransformerFactory.java
---
@@ -70,36 +86,62 @@ public DocTransformer create(String field, SolrParams
params, SolrQueryRequest r
}
String parentFilter = params.get( "parentFilter" );
- if( parentFilter == null ) {
- throw new SolrException( ErrorCode.BAD_REQUEST, "Parent filter
should be sent as parentFilter=filterCondition" );
+ BitSetProducer parentsFilter = null;
+ boolean buildHierarchy = params.getBool("hierarchy", false);
+ if( parentFilter == null) {
+ if(!buildHierarchy) {
+ throw new SolrException( ErrorCode.BAD_REQUEST, "Parent filter
should be sent as parentFilter=filterCondition" );
+ }
+ parentsFilter = new QueryBitSetProducer(rootFilter);
+ } else {
+ try {
+ Query parentFilterQuery = QParser.getParser(parentFilter,
req).getQuery();
+ //TODO shouldn't we try to use the Solr filter cache, and then
ideally implement
+ // BitSetProducer over that?
+ // DocSet parentDocSet =
req.getSearcher().getDocSet(parentFilterQuery);
+ // then return BitSetProducer with custom BitSet impl accessing
the docSet
+ parentsFilter = new QueryBitSetProducer(parentFilterQuery);
+ } catch (SyntaxError syntaxError) {
+ throw new SolrException( ErrorCode.BAD_REQUEST, "Failed to create
correct parent filter query" );
+ }
}
String childFilter = params.get( "childFilter" );
int limit = params.getInt( "limit", 10 );
- BitSetProducer parentsFilter = null;
- try {
- Query parentFilterQuery = QParser.getParser( parentFilter,
req).getQuery();
- //TODO shouldn't we try to use the Solr filter cache, and then
ideally implement
- // BitSetProducer over that?
- // DocSet parentDocSet =
req.getSearcher().getDocSet(parentFilterQuery);
- // then return BitSetProducer with custom BitSet impl accessing the
docSet
- parentsFilter = new QueryBitSetProducer(parentFilterQuery);
- } catch (SyntaxError syntaxError) {
- throw new SolrException( ErrorCode.BAD_REQUEST, "Failed to create
correct parent filter query" );
- }
-
Query childFilterQuery = null;
if(childFilter != null) {
--- End diff --
The code flow from here to the end of the method looks very awkward to me.
I think the top "if" condition should test for buildHierarchy that we the
nested and non-nested cases are clearly separated. Do you think that would be
clear?
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