Apache Solr - OR in filter query

Question

Is it possible to search (with apache Solr) for items which are in one of few categories using filter query, e.g. items in category 'computers' OR 'phones'

When I want to search for items in category computers AND phones I type:

select/?q=...&fq=cat:computers&fq=cat:phones

but it is possible to use OR instead of AND?

Answer 1

A filter query is just a query -- as complex as you'd like. So, you can certainly build up a query, e.g.,

fq=(cat1:val1 OR cat2:val2 OR (cat3:(val3 AND val4)))

...or whatever.

The only difference between a filter query and a plain-old query (besides memory and caching issues, which you might want to also think about) is that a filter query doesn't affect the relevancy scores at all. But in terms of complexity, you can do whatever you want.

Answer 2

You can use

fq=cat:(computers OR phones)