old_contents: from django.db import models
  
  # Create your models here.
  
new_contents: from django.db import models
  from Portal.models import CharacterAttribute
  from django.utils.translation import ugettext as _
  
  # Create your models here.
  
  class Enrollment(models.Model):
      roles = models.ManyToManyField(_('Role'), CharacterAttribute)
      open = models.BooleanField(_('Open Enrollment'), default=False)
      limit = models.SmallIntegerField(_('Limit'))
      background_image = models.ImageField(_('Background image'), upload_to='/enrollment/background/', blank=True)
      thumbnail = models.ImageField(_('Thumbnail image'), upload_to='/enrollment/thumbnail/', blank=True)
  
      def reach_limit(self):
          pass
  
      class Meta:
          verbose_name = _('Enrollment')
          verbose_name_plural = _('Enrollments')
subject: Add first model for Enrollment application