Re: Get fields from a Query object
My code has been given a query string, which we parse into the Query object and would like to get a list of fields from. I'm assuming there exists a method to do so, as it seems like a useful function. If not should I be parsing the string for fields myself. Anuj On Sun, Aug 1, 2010 at 2:21 AM, Erick Erickson wrote: > Could you explain more about what you're trying to do? You're writing the > query > after all, so you probably already know what went into it. > > Which shows that I don't understand what you want to do at all. > > Best > Erick > > On Sat, Jul 31, 2010 at 9:41 AM, Anuj Shah wrote: > > > Hi, > > > > Is there a way to get all the fields involved in a query? > > > > Thanks > > > > Anuj > > >
creating tag cloud (with faceted search?) for search result (filter)
Hi guys,
I did some extensive research over the last days, also searched the threads
in this forum (big compliment to the users helping here!) about creating a
tag cloud of the search result(s). But I still couln't find something
satisfying me yet...
Background:
I have lots of user text comments (unstructured) stored in the database,
collected over a website as feedback.
My goal is, first to make this amount of data searchable/filterable with
good performance and then I want to create a tag cloud of the results after
searching for a single term, so that I can use the tag cloud then for
iterative search refinement by clicking on one term (for filtering again) in
the cloud! No discussion about the tag cloud decision please :) Focus is on
single terms/tags mainly, no phrases.
Lets imagine doing a search/filter with the word "performance":
- while showing the results, a tag cloud should be generated with all the
terms connected to those text comments, in which "performance" appears.
- when I click on a word in this tagcloud, it should do the same again for
this selected word etc.
=> have the "corpus" filtered in a visualized way as a tag cloud
Actually it goes in this direction ("Drill Clouds"):
http://lab.cisti-icist.nrc-cnrc.gc.ca/cistilabswiki/index.php/Ungava
Now my questions on that:
Do I need Solr (because of the faceted search feature) or is it also
possible with lucene only?
If Solr - which steps are neccessary to do a faceted search/navigation as a
tag cloud?
I know it has something to do with "term vectors", right?
If it's not possible to realise it 100%, no worries, just let me know, how
far I can go.
Please don't be too informatic in the first place, as I'm not a developer :)
Glad for any help of you guys!
Markus
Related threads to this:
http://bit.ly/94y97g
http://www.gossamer-threads.com/lists/lucene/java-user/88048
http://markmail.org/message/bjn2dhy5i4rh6cgg#query:+page:1+mid:czvpv2wt5e7gtqlu+state:results
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Re: Get fields from a Query object
Did you look at Query.extractTerms? I think that'll work for you. Note that the query must be rewritten, and that the set of terms will have duplicate fields. i.e. if you search field1:Erick +field1:James I expect you'll have two terms in the set that are on field1. Best Erick On Mon, Aug 2, 2010 at 8:16 AM, Anuj Shah wrote: > My code has been given a query string, which we parse into the Query object > and would like to get a list of fields from. > > I'm assuming there exists a method to do so, as it seems like a useful > function. If not should I be parsing the string for fields myself. > > Anuj > > > > > > On Sun, Aug 1, 2010 at 2:21 AM, Erick Erickson >wrote: > > > Could you explain more about what you're trying to do? You're writing the > > query > > after all, so you probably already know what went into it. > > > > Which shows that I don't understand what you want to do at all. > > > > Best > > Erick > > > > On Sat, Jul 31, 2010 at 9:41 AM, Anuj Shah > wrote: > > > > > Hi, > > > > > > Is there a way to get all the fields involved in a query? > > > > > > Thanks > > > > > > Anuj > > > > > >
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heads up -- index corruption on Solr/Lucene trunk/3.x branch
This issue: https://issues.apache.org/jira/browse/LUCENE-2574 which was committed 3 days ago (Friday Jul 30) can cause index corruption. I just committed a fix for the corruption, but if you've been using Solr/Lucene trunk or 3x branch updated after the first commit on Friday, and you built any indexes with it, you should rebuild them! Sorry, Mike - To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
Modify how a field value is stored in Lucene
Hi all. This is my question. Currently, I'm working in a project where I have Lucene documents with one field that use payloads. For this field, I use org.apache.lucene.analysis.payloads.DelimitedPayloadTokenFilter, so the value for that field is something like: "fieldValue\1.0" where '\' is the payload delimiter and "1.0" is the field value payload. The thing is that the values of this field are stored in the index, so when I retrieve the field value from the index, I get "fieldValue\1.0" and manually have to remove the payload from the field value in order to show it to the user, put it in some XML or whatever. There is any way to modify how a field value is stored in the index as it can be modified how the value is indexed vía TokenFilters? In this particular case, the needed modification is remove the payload from the index stored field value, but there are a lot of cases where something like this could be useful. Thanks in advance. Cheers.
