from django.db import models

class Issue(models.Model):
  name = models.CharField(max_length=255)
  date = models.DateField()
  def __unicode__(self):
    return self.name
  
class Article(models.Model):
  author = models.ForeignKey("Contributor", blank=True, null=True)
  title = models.CharField(max_length=255)
  text = models.TextField()
  issue = models.ForeignKey(Issue)
  def __unicode__(self):
    return self.title + " - " + self.author

class Contributor(models.Model):
  name = models.CharField(max_length=255)
  email = models.EmailField(blank=True, null=True)
  def __unicode__(self):
    return self.name + ": " + self.email