filtering results in solr

I'm trying to bui开发者_如何学编程ld auto suggest functionality using Solr. The index contains different locations within a city and looks something like

id: unique id
name: the complete name
type: can be one of 'location_zone', 'location_subzone', 'location_city', 'outlet', 'landmark' ...
city: city id

now when the user types something, I want it to return suggestion only from the current city and of type location_*. something similar to WHERE city_id = 1 AND type="location_%" in SQL.

I guess one way to do it is by faceting but is that the right way? will it still search in all documents and then filter the results or will it apply the condition first as mysql would do it

PS: I'm new to solr and would appreciate if you can point out any mistakes in the approach

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Solr does provide filtering, using the fq parameter. What you're looking for should be something along the lines of:

&fq=city_id:1&fq=type:location_*&q=...

This page illustrates very well how and when to use filter queries in Solr.