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From Dennis Gearon <gear...@sbcglobal.net>
Subject Re: How to tell Solr to return all fields including empty fields?
Date Sun, 03 Oct 2010 06:45:22 GMT
One would think that a JSON output handler in Solr/Lucene would create a:

"fieldname": null

for missing fields. Is it possible to set that as a parameter to a json-requested output?

In PHP, NULL and missing are ALMOST the exact same thing. In databases, they actually are,
in my limited experience.



Dennis Gearon

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--- On Sat, 10/2/10, Khai Doan <khaitdoan@gmail.com> wrote:

> From: Khai Doan <khaitdoan@gmail.com>
> Subject: Re: How to tell Solr to return all fields including empty fields?
> To: solr-user@lucene.apache.org
> Date: Saturday, October 2, 2010, 10:36 PM
> Thanks for replying.  I need to
> have the empty fields because if the field
> is not there, the Java library (
> http://www.json.org/javadoc/org/json/JSONObject.html)
> that I use to parse
> the result will throw an exception.  Quite
> inconvenient.
> 
> Thanks,
> Khai
> 
> On Fri, Oct 1, 2010 at 6:45 PM, Erick Erickson <erickerickson@gmail.com>wrote:
> 
> > Nope. If a field is empty, it's just not in the
> document. You could index
> > an empty value (some unique value for empty) if you
> really need this.
> >
> > But a more interesting question is why you need this.
> What is it about
> > returning an empty field that's important? Couldn't
> you detect this through
> > the absence of the field?
> >
> > Best
> > Erick
> >
> > On Fri, Oct 1, 2010 at 3:44 PM, Khai Doan <khaitdoan@gmail.com>
> wrote:
> >
> > > Hello everyone,
> > >
> > > Right now, I am using fl=*,score to get all
> fields from Solr.  However
> > > empty
> > > fields are not returned.  Is there a way for
> me to tell Solr to return
> > all
> > > fields including empty fields?
> > >
> > > Thanks,
> > > Khai
> > >
> >
> 

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