title: in django admin, can we have a multiple select based on choices
body: <p><a href="http://docs.djangoproject.com/en/dev/ref/models/fields/#choices" rel="noreferrer">http://docs.djangoproject.com/en/dev/ref/models/fields/#choices</a></p>
  
  <p>i've read through the documentation and this implies using a database table for dynamic data, however it states </p>
  
  <blockquote>
    <p>choices is meant for static data that doesn't change much, if ever.</p>
  </blockquote>
  
  <p>so what if i want to use choices, but have it select multiple because the data i'm using is quite static, e.g days of the week.</p>
  
  <p>is there anyway to achieve this without a database table?</p>