title: Sunspot Solr: Is it possible to add a field without reindexing all rows?
body: <p>On the <a href="https://github.com/sunspot/sunspot" rel="nofollow">documentation</a> for Sunspot, it says:</p>
  
  <blockquote>
    <p>If you make a change to the object's "schema" (code in the searchable block), you must reindex all objects so the changes are reflected in Solr</p>
  </blockquote>
  
  <p>What happens if this procedure isn't followed?</p>
  
  <p>Specifically, I have a fairly large index on Websolr, and if I just add a boolean field to it without reindexing, what will happen?</p>
  
  <p>I'd like to be able to filter by <code>true</code> values of the boolean field, but I'll never need to filter by <code>false</code> or <code>nil</code> values. Will this work, or must this admonition to reindex always be obeyed?</p>