django-eav2/tests/models.py

from django.db import models

class Patient(models.Model):
    class Meta:
        app_label = 'eav'

    name = models.CharField(max_length=12)

    def __unicode__(self):
        return self.name

class Encounter(models.Model):
    class Meta:
        app_label = 'eav'

    num = models.PositiveSmallIntegerField()
    patient = models.ForeignKey(Patient)

    def __unicode__(self):
        return '%s: encounter num %d' % (self.patient, self.num)