title: How can I tell what changes 'rake db:migrate' will apply before applying them?
body: <p>The command <code>rake db:migrate</code> will apply all relevant new migrations to a database and will list in the output the migrations that were applied.</p>
  
  <p>I'd like to know in advance what migrations will be applied so as to note down a list of the changes that are expected in a production environment.</p>
  
  <p>Is there an option I can use in conjunction to <code>rake db:migrate</code> that will show me what changes will be applied without actually applying them?</p>