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From Jan Høydahl (Created) (JIRA) <>
Subject [jira] [Created] (SOLR-3239) Function for returning a CurrencyField as a virtual field
Date Tue, 13 Mar 2012 11:59:40 GMT
Function for returning a CurrencyField as a virtual field

                 Key: SOLR-3239
             Project: Solr
          Issue Type: New Feature
            Reporter: Jan Høydahl
             Fix For: 4.0

With the new CurrencyField from SOLR-2202, we can now do range queries, sort and soon faceting
on CurrencyField.

One thing we cannot do is return a converted value. We can only return the stored value which
must be in the same currency as it was entered, e.g. "10.0,USD". People now have to do this
conversion in application layer, reading the same currency.xml file as in Solr. This is a
mess to keep in sync, and is hard to support with other ExchangeRateProviders or in other
client languages than Java.

This patch should implement a Function which takes a field name and requested currency as
input and returns the converted value. Optionally it could also take care of localized display,
e.g. "$10.0" instead of "10.0,USD". Proposed syntax:

&fl=title,price:currency(price_c,EUR)         # Returns price_c in EUR as "price"
&fl=title,price:currency(price_c,EUR,en_US)   # Returns price_c in EUR, formatted according
to en_US locale

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