title: Remove Model and Table so can start again in Rails
body: <p>I created a model for comments at the start of a project, but have now come to the realisation I need to create some polymorphic relations so I can use comments with a number of other models as well.  Considering the the code I already have etc, I'm thinking it might be easier for me to just start again from scratch so I can build all the views/controllers etc in the correct way for my new polymorphic world.</p>
  
  <p>I see that I can run <code>rails destroy model comments</code> to achieve this but I have two questions on that:</p>
  
  <ol>
  <li>Will this delete the model, migrations AND the actual DB table?</li>
  <li>What are the implications when I want to create a new model with the exact same name? </li>
  </ol>