Nice find, Amhet, I'd love to see this formalized in the Solr schema syntax, as it is something I've often wanted to. Max Chars is OK, too, but would like to see max tokens as well.

On Oct 12, 2009, at 6:31 PM, AHMET ARSLAN wrote:

Hi,
I am pushing data to solr from two different sources nutch
and a cms. I have a data clash in that in nutch a copyField
is required to push the url field to the id field as it is
used as  the primary lookup in the nutch solr
intergration update. The other cms also uses the url field
but also populates the id field with a different value. Now
I can't really change either source definition so is there a
way in solrconfig or schema to check if id is empty and only
copy if true or is there a better way via the
updateprocessor?

copyField declaration has three attributes: source, dest and maxChars.
Therefore it can be concluded that there is no way to do it in schema.xml

Luckily, Wiki [1] has a quick example that implements a conditional copyField.

[1] http://wiki.apache.org/solr/UpdateRequestProcessor




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Grant Ingersoll
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