class User(models.Model):
  url = models.CharField(max_length=30)
class Page(models.Model):
  user = models.ForeignKey(User)
  
  title = models.CharField(max_length=30)
  description = models.TextField()
  pub_date = models.DateTimeField('date published', auto_now=1)

class PageUploadForm(ModelForm):
  class Meta:
    model = Page

f = PageUploadForm()
f.print()

<p><label for="id_user">User:</label> <select name="user" id="id_user">
<option value="" selected="selected">---------</option>
</select></p>

  class PartialAuthorForm(ModelForm):
      class Meta:
          model = Author
          exclude = ('birth_date',)