向帖子添加类别的最佳方法是什么 - Ruby on Rails博客

I am new to Ruby and Rails so bear with me please. I have created a very simple blog application with both posts and comments. Everything works great. My next question regarding adding categories. I am wondering the best way to do this. As I can't see too far in front of me yet when it comes to Rails I thought I would ask. I am new to Ruby and Rails so bear with me plea