Topic: Whats the best plugin for Filter/Search engin

Hello.

I need to setup a filter for some on my models. And a global search engine for all the website.
but i have no idea how to do that in rails 3.0.1

i looked at metasearch but the bundle install say need activerecord 3.1

i looked for sphinx, but the host don't support it.

I'm really lost, how you create filter? With scope?

I use Active Admin and this support the filter, so i think its possible but i don't know where is the source of active admin to check it how they do.

Thanks for your help.