title: Adding tags to posts in Ruby on Rails
body: <p>I am creating a blog in Rails using Scaffolding. I want to add a 'tags' field on each post like on StackOverflow and WordPress. I can do this with the string type ( <code>rails generate scaffold post title:string body:text tags:string</code> ) and then comma separated, but it's not good practice since I want the reader to browse by tags ( e.g. <code>/tags/web20</code> or <code>/tags/lol</code> ). How can I do this?</p>