from django.db import models class City(models.Model): id = models.BigAutoField(primary_key=True) name = models.CharField(max_length=50) def __str__(self): return self.name class District(models.Model): city = models.ForeignKey(City, models.CASCADE, primary_key=True) name = models.CharField(max_length=50) def __str__(self): return self.name class Reporter(models.Model): first_name = models.CharField(max_length=30) last_name = models.CharField(max_length=30) email = models.EmailField() facebook_user_id = models.BigIntegerField(null=True) raw_data = models.BinaryField(null=True) small_int = models.SmallIntegerField() interval = models.DurationField() class Meta: unique_together = ('first_name', 'last_name') def __str__(self): return "%s %s" % (self.first_name, self.last_name) class Article(models.Model): headline = models.CharField(max_length=100) pub_date = models.DateField() body = models.TextField(default='') reporter = models.ForeignKey(Reporter, models.CASCADE) response_to = models.ForeignKey('self', models.SET_NULL, null=True) unmanaged_reporters = models.ManyToManyField(Reporter, through='ArticleReporter', related_name='+') class Meta: ordering = ('headline',) index_together = [ ["headline", "pub_date"], ['headline', 'response_to', 'pub_date', 'reporter'], ] def __str__(self): return self.headline class ArticleReporter(models.Model): article = models.ForeignKey(Article, models.CASCADE) reporter = models.ForeignKey(Reporter, models.CASCADE) class Meta: managed = False class Comment(models.Model): ref = models.UUIDField(unique=True) article = models.ForeignKey(Article, models.CASCADE, db_index=True) email = models.EmailField() pub_date = models.DateTimeField() up_votes = models.PositiveIntegerField() body = models.TextField() class Meta: constraints = [ models.CheckConstraint(name='up_votes_gte_0_check', check=models.Q(up_votes__gte=0)), models.UniqueConstraint(fields=['article', 'email', 'pub_date'], name='article_email_pub_date_uniq'), ] indexes = [ models.Index(fields=['email', 'pub_date'], name='email_pub_date_idx'), ]