gistfile1.py

class Event(models.Model):
    title = models.CharField(_('title'), max_length=255)
    slug = models.SlugField(_('slug'))
    description = models.TextField(_('description'))
    # more code

class EventMetadata(models.Model):
    event = models.ForeignKey(Event, verbose_name=_('event'),
                              related_name='metadata')
    # more code