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From Alexandre Rafalovitch <arafa...@gmail.com>
Subject Re: Derived Field Solr Schema
Date Fri, 21 Jun 2019 19:34:50 GMT
The easiest way is to do that with Update Request Processors:
https://lucene.apache.org/solr/guide/7_7/update-request-processors.html

Usually, you would clone a field and then do your transformations. For your
specific example, you could use:
*) FieldLengthUpdateProcessorFactory - int rather than boolean
*) StatelessScriptUpdateProcessorFactory - if you want to have full freedom
(but a bit slower indexing)
*) RegexReplaceProcessorFactory - maybe a bit trickier but also interesting.

You may also find this (mine) resource list interesting:
http://www.solr-start.com/info/update-request-processors/ (it is a bit out
of date).

Regards,
  Alex.

On Fri, Jun 21, 2019, 2:19 PM Muaawia Bin Arshad, <amuaawia@abebooks.com>
wrote:

> Hi Everyone,
>
> I am fairly new to solr and I was wondering if there is a way in solr 7.7
> to populate fields based on some pre-processing on other field. So let’s
> say I have a field called fieldX defined in the schema, I want to define
> another field called isFieldXgood which is just a Boolean field that shows
> whether the length of fieldX is larger than 10.
>
>
> Thanks,
> Muaawia Bin Arshad
>

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