title: Rails user search and filters
body: <p>I've looked into sphinx and watched the railscast tutorial on it, but I don't need full text search. I would like to be able to allow people to search for a user, either by name or email. And after someone searches for a user by name or email, they can further filter it by adding in the user's city. </p>
  
  <p>I don't really think full text search is necessary for that. But I've never done any kind of searching in rails and I don't know how to do it without a gem.</p>
  
  <p>I know it's kind of like User.where(:name=> ) based on my googling or something like that, but I'm not sure exactly how it is done or whether this is good for performance.</p>
  
  <p>How could I implement what I want to do, and is a full text search necessary? </p>