title: one-to-many inline select with django admin
body: <p>I have a standard many-to-one relationship set up. There are a bunch of fields, but for our purposes here, the relevant model is:</p>
  
  <pre><code>class Class(models.Model):
      name = models.CharField(max_length=128)
  
  class Student(models.Model):
      class = models.ForeignKey(Class)
      name = models.CharField(max_length=128)
      address = models.CharField(max_length=128)
      # ...etc
  </code></pre>
  
  <p>I created an admin, and it works great. it even automatically has the ability for me to set the Class when I am editing a Student. However, when I go to create/edit a Class, all I get is an input box for the name.</p>
  
  <p>Is there a way to add a box/field where Students can be added as members of Class from the Class admin page? I can make a form inline, but that is to create new Students. I already have all my Students created and am just looking for a quick method to add multiple existing Students to different Class'.</p>