You can't selectively update fields in docs read from an index, in old
or current versions of lucene. I think there are some ideas floating
around but nothing usable today as far as I know. You'll need to
rebuild the whole doc before passing it to writer.updateDocument().
--
Ian.
On Wed, May 9, 2012 at 6:38 PM, Tim Eck <t...@terracottatech.com> wrote:
> Note: I'm bound to lucene 3.0.3 for the context of this question, but
> I would be interested to know if newer versions would help me here.
>
> I have an existing document in my directory that has one regular
> String field and one numeric field. I naively thought I could update
> that document to change the String field with code like this:
>
> FSDirectory dir = FSDirectory.open(...);
> IndexWriter writer = new IndexWriter(dir, new
> StandardAnalyzer(Version.LUCENE_30), MaxFieldLength.UNLIMITED);
>
> // doc has 2 fields, one String and the other numeric
> Document doc = new Document();
> doc.add(new Field("string", "value", Store.YES,
> Index.ANALYZED_NO_NORMS));
> NumericField nf = new NumericField("numeric", Field.Store.YES,
> true);
> nf.setIntValue(42);
> doc.add(nf);
> writer.addDocument(doc);
> writer.commit();
>
> // make sure we can query on the numeric field
> IndexSearcher searcher = new IndexSearcher(dir);
> TopDocs docs = searcher.search(new TermQuery(new Term("numeric",
> NumericUtils.intToPrefixCoded(42))), 1);
> if (docs.totalHits != 1) {
> throw new AssertionError();
> }
> doc = searcher.doc(docs.scoreDocs[0].doc);
> searcher.close();
>
> // update document with new value for string field
> doc.removeField("string");
> doc.add(new Field("string", "value2", Store.YES,
> Index.ANALYZED_NO_NORMS));
> writer.updateDocument(new Term("string", "value"), doc);
> writer.commit();
>
> // search again
> searcher = new IndexSearcher(dir);
> docs = searcher.search(new TermQuery(new Term("numeric",
> NumericUtils.intToPrefixCoded(42))), 1);
> if (docs.totalHits != 1) {
> throw new AssertionError(docs.totalHits);
> }
>
>
> That doesn't seem to work however. It seems I need to get the
> NumericField rematerialized in the document passed to
> updateDocument(). I was hoping to avoid that if possible so
> I'm looking for any suggestions someone might offer.
>
>
>
>
>
>
>
>
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