title: Rails schema not updating with migrations
body: <p>My <code>schema.rb</code> is no longer updating whenever I run <code>db:migrate</code>. It will update to the latest version but with none of the queries in my migrations and the comment:</p>
  
  <blockquote>
    <p>Could not dump table "games" because of following NoMethodError
       undefined method `[]' for nil:NilClass</p>
  </blockquote>
  
  <p>I accidentally manually dropped the table in console and was wondering if there was a way to resync my schema to the migrations? When I run <code>rake db:drop db:create db:migrate</code> the exact same schema generates.</p>