lucene-java-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Ramon Casha <rca...@gmail.com>
Subject Re: Help needed: search is returning no results
Date Tue, 18 Dec 2012 14:44:41 GMT
I converted them to TextField but the result is the same.

  doc.add(new TextField("text", text.toString(), Store.YES));

The search always returns an empty array.

Ramon Casha


On 18 December 2012 15:35, Jack Krupansky <jack@basetechnology.com> wrote:
> Maybe you wanted "text" fields that are analyzed and tokenized, as opposed
> to string fields which are not analyzed and stored and queried exactly
> as-is.
>
> See:
> http://lucene.apache.org/core/4_0_0/core/org/apache/lucene/document/TextField.html
>
> But, show us some of your indexed data and queries that fail.
>
> -- Jack Krupansky
>
> -----Original Message----- From: Ramon Casha
> Sent: Tuesday, December 18, 2012 9:14 AM
> To: java-user@lucene.apache.org
> Subject: Help needed: search is returning no results
>
>
> I have just downloaded and set up Lucene 4.0.0 to implement a search
> facility for a web app I'm developing.
>
> Creating the index seems to be successful - the files created contain
> the text that I'm indexing. However, search is returning no results.
> The code I'm using is fairly similar to the examples given.
>
> Here is the search code:
>
>    private static final File index = new File("/tmp/naturopedia-index");
>    private static final Version VERSION = Version.LUCENE_40;
>
>    public String search() throws IOException, ParseException {
>        Analyzer analyzer = new StandardAnalyzer(VERSION);
>        Directory directory = FSDirectory.open(index);
>
>        DirectoryReader ireader = DirectoryReader.open(directory);
>        IndexSearcher isearcher = new IndexSearcher(ireader);
>
>        QueryParser parser = new QueryParser(VERSION, "labels", analyzer);
>
>        Query q = parser.parse(getQuery());
>        ScoreDoc[] hits = isearcher.search(q, 1000).scoreDocs;
>
>        for (int i = 0; i < hits.length; i++) {
>            Document hitDoc = isearcher.doc(hits[i].doc);
>            System.out.println(hitDoc.getField("id"));
>        }
>        ireader.close();
>        directory.close();
>        return "search";
>    }
> ----------------------
> Every time I try this, the search returns zero results. I tried with
> different fields (text and labels), both of which are indexed, and I
> tried different words. Any help would be appreciated.
>
> Here is the code for producing the index:
>
> public String crawl() throws IOException {
>        Analyzer analyzer = new StandardAnalyzer(VERSION);
>        Directory directory = FSDirectory.open(index);
>
>        IndexWriterConfig config = new IndexWriterConfig(VERSION, analyzer);
>        config.setOpenMode(IndexWriterConfig.OpenMode.CREATE);
>        IndexWriter iwriter = new IndexWriter(directory, config);
>
>        DB db = new DB(); // JPA interface class.
>
>        for ( Taxonomy t : db.taxonomy.all() ) {
>            LOG.log(Level.INFO, "Scanning {0}", t);
>
>            Document doc = new Document();
>            doc.add(new LongField("id", t.getId(), Store.YES));
>            LOG.log(Level.INFO, "  id={0}", t.getId());
>            StringBuilder text = new StringBuilder();
>            for(Text l : t.getTexts()) {
>                text.append(l.getWikiText())
>                        .append((' '));
>            }
>            if(text.length() > 0) {
>                doc.add(new StringField("text", text.toString(),
> Field.Store.YES));
>                LOG.log(Level.INFO, "  text={0}", text);
>            }
>
>            StringBuilder labels = new StringBuilder();
>            toIndex(labels, t.getLabels());
>            for(Image l : t.getImages()) {
>                toIndex(labels, l.getLabels());
>            }
>            doc.add(new StringField("labels", labels.toString(),
> Field.Store.NO));
>            LOG.log(Level.INFO, "  labels={0}", labels);
>            StringBuilder sb = new StringBuilder();
>            for ( Tag tag : t.getTags() ) {
>                toIndex(sb, tag.getLabels());
>            }
>            if(!sb.toString().isEmpty()) {
>                doc.add(new StringField("tags", sb.toString(),
> Field.Store.NO));
>                LOG.log(Level.INFO, "  tags={0}", sb);
>            }
>            iwriter.addDocument(doc);
>        }
>
>        db.close();
>        iwriter.close();
>
>        return "search";
>    }
>
>    private void toIndex(StringBuilder sb, LabelGroup lg) {
>        for(Label l : lg.getLabels()) {
>            sb.append(l.getText());
>            sb.append(" ");
>        }
>    }
>
>
> --
> Ramon Casha
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> For additional commands, e-mail: java-user-help@lucene.apache.org
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> For additional commands, e-mail: java-user-help@lucene.apache.org
>

---------------------------------------------------------------------
To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
For additional commands, e-mail: java-user-help@lucene.apache.org


Mime
View raw message