text: from sample.core.choices import ArticleStatus
  
  from django.db.models import Model, PositiveSmallIntegerField, TextField, \
      CharField
  
  
  class Article(Model):
      title = CharField(max_length=280)
      content = TextField()
      status = PositiveSmallIntegerField(
  		default=ArticleStatus.UNPUBLISHED, choices=ArticleStatus.CHOICES)
  