title: Ruby on Rails renamed foreign key
body: <p>I'm trying to create a model for a comic book which has 1 writer and 1 artist. These are both instances of a Person. However how do I show this in my migration?</p>
  
  <pre><code>class CreateComics &lt; ActiveRecord::Migration
     def self.up
       create_table :comics do |t|
         t.column :name, :string      
         t.column :writer_id, :integer, :null =&gt; false
         t.column :artist_id, :integer, :null =&gt; false
       end
     end
  ...
  </code></pre>
  
  <p>How do I say :writer_id should map to :person_id or is this kind of renaming frowned upon?</p>