class Parent(models.Model):
    name       = models.CharFiled(max_length="30")
    title      = models.CharField(max_length="30")
    work_title = models.CharField(max_length="30")

class Child(models.Model):
    name        = models.CharField(max_length="30")
    school_year = models.IntegerField(max_length="30")

class Info(models.Model):
    code          = models.CharField(max_length="30")
    family_member = models.CharField(max_length="1", choices=(('1', 'Parent'),('2', 'Child'),))
    person        = models.ForeignKey('family.???') #here is where I have the issue