The Solr Javadoc has an example:
http://lucene.apache.org/solr/4_3_0/solr-core/org/apache/solr/update/processor/CountFieldValuesUpdateProcessorFactory.html
I have a more complete example (plus others) in the book:
Example - Store a count of the values of a named multivalued field in
another field
<updateRequestProcessorChain name="count-features">
<processor class="solr.CloneFieldUpdateProcessorFactory">
<str name="source">features</str>
<str name="dest">features_count_i</str>
</processor>
<processor class="solr.CountFieldValuesUpdateProcessorFactory">
<str name="fieldName">features_count_i</str>
</processor>
<processor class="solr.DefaultValueUpdateProcessorFactory">
<str name="fieldName">features_count_i</str>
<int name="value">0</int>
</processor>
<processor class="solr.LogUpdateProcessorFactory" />
<processor class="solr.RunUpdateProcessorFactory" />
</updateRequestProcessorChain>
Note the use of the Default Value Update processor to assure that the
"features_count_i" has a numeric value of "0" if
there were no input values for the "features" field.
Index content:
curl
"http://localhost:8983/solr/update?commit=true&update.chain=count-features";
\
-H 'Content-type:application/json' -d '
[{"id": "doc-1",
"title_s": "Hello World",
"features": ["Fast", "Cheap", "Flexible", "Reliable", "X"]}]'
Results:
"id":"doc-1",
"title_s":"Hello World",
"features":["Fast",
"Cheap",
"Flexible",
"Reliable",
"X"],
"features_count_i":5,
-- Jack Krupansky
-----Original Message-----
From: Alexandre Rafalovitch
Sent: Tuesday, June 11, 2013 8:28 AM
To: [email protected]
Subject: Re: Documents with multiple values in a certain field
I believe the usual solution is to pre-calculate that by using
UpdateRequestProcessor (probably:
CountFieldValuesUpdateProcessorFactory ).
Regards,
Alex.
Personal blog: http://blog.outerthoughts.com/
LinkedIn: http://www.linkedin.com/in/alexandrerafalovitch
- Time is the quality of nature that keeps events from happening all
at once. Lately, it doesn't seem to be working. (Anonymous - via GTD
book)
On Tue, Jun 11, 2013 at 5:43 AM, Silvio Hermann <[email protected]>
wrote:
Hello,
is there a way to get all documents where a certain field has multiple
entries?
best,
Silvio
