On 9/5/07, Ismael <[EMAIL PROTECTED]> wrote:
> Hello,
>
> I want to search in a nutch index in the field "content"; but I get no
> results.
>
> I modified the index-basic plugin to boost content field and to store
> it; but searching still doesn't return hits.
>
> Here is the code I use to search:
>
> NutchBean bean = new NutchBean(conf,index);
> Query query = Query.parse("content:orde", conf);
> Hits hits = bean.search(query, 10000);
>
> It doesn't return any hit; searching the same with Luke returns 4
> documents with boosts 1, 0.54, 0.54, 0.43.
>
> I am pretty sure that in my code "conf" and "index" are the right
> values since searching in another field returns the same results as
> Luke.
>
> I searched over nutch-default to see any property that could help but
> i found nothing; I suppose I am missing something but i cannot figure
> what I am missing.
A query like "content:orde" is parsed by nutch's query plugins which
convert it into a Lucene BooleanQuery. However, by default, there are
no handlers for field "content" so, it is parsed to something like
this "content orde". Here is how it works:
* Nutch's Query checks if there is a handler for field "content".
(check out query-url or query-site for an example).
* Since there are none, query gets parsed to "content orde".
* After this, query plugins work on resulting query. Assuming only
query-basic is active, it will be something like this in the end (note
that query plugins receive nutch's query + lucene boolean query built
up so far and update boolean query): "(content:orde title:order
url:orde)" <-- this one is the resulting lucene query.
Hope this helps.
>
> Thank you for reading!
>
--
Doğacan Güney
