Moved foreign_object models.py into a module.

tests/foreign_object/models/person.py

@@ -0,0 +1,111 @@
+import datetime
+
+from django.db import models
+from django.utils.encoding import python_2_unicode_compatible
+
+
+@python_2_unicode_compatible
+class Country(models.Model):
+    # Table Column Fields
+    name = models.CharField(max_length=50)
+
+    def __str__(self):
+        return self.name
+
+
+@python_2_unicode_compatible
+class Person(models.Model):
+    # Table Column Fields
+    name = models.CharField(max_length=128)
+    person_country_id = models.IntegerField()
+
+    # Relation Fields
+    person_country = models.ForeignObject(
+        Country,
+        from_fields=['person_country_id'],
+        to_fields=['id'],
+        on_delete=models.CASCADE,
+    )
+    friends = models.ManyToManyField('self', through='Friendship', symmetrical=False)
+
+    class Meta:
+        ordering = ('name',)
+
+    def __str__(self):
+        return self.name
+
+
+@python_2_unicode_compatible
+class Group(models.Model):
+    # Table Column Fields
+    name = models.CharField(max_length=128)
+    group_country = models.ForeignKey(Country, models.CASCADE)
+    members = models.ManyToManyField(Person, related_name='groups', through='Membership')
+
+    class Meta:
+        ordering = ('name',)
+
+    def __str__(self):
+        return self.name
+
+
+@python_2_unicode_compatible
+class Membership(models.Model):
+    # Table Column Fields
+    membership_country = models.ForeignKey(Country, models.CASCADE)
+    date_joined = models.DateTimeField(default=datetime.datetime.now)
+    invite_reason = models.CharField(max_length=64, null=True)
+    person_id = models.IntegerField()
+    group_id = models.IntegerField()
+
+    # Relation Fields
+    person = models.ForeignObject(
+        Person,
+        from_fields=['membership_country', 'person_id'],
+        to_fields=['person_country_id', 'id'],
+        on_delete=models.CASCADE,
+    )
+    group = models.ForeignObject(
+        Group,
+        from_fields=['membership_country', 'group_id'],
+        to_fields=['group_country', 'id'],
+        on_delete=models.CASCADE,
+    )
+
+    class Meta:
+        ordering = ('date_joined', 'invite_reason')
+
+    def __str__(self):
+        return "%s is a member of %s" % (self.person.name, self.group.name)
+
+
+class Friendship(models.Model):
+    # Table Column Fields
+    from_friend_country = models.ForeignKey(Country, models.CASCADE, related_name="from_friend_country")
+    from_friend_id = models.IntegerField()
+    to_friend_country_id = models.IntegerField()
+    to_friend_id = models.IntegerField()
+
+    # Relation Fields
+    from_friend = models.ForeignObject(
+        Person,
+        on_delete=models.CASCADE,
+        from_fields=['from_friend_country', 'from_friend_id'],
+        to_fields=['person_country_id', 'id'],
+        related_name='from_friend')
+
+    to_friend_country = models.ForeignObject(
+        Country,
+        from_fields=['to_friend_country_id'],
+        to_fields=['id'],
+        related_name='to_friend_country',
+        on_delete=models.CASCADE,
+    )
+
+    to_friend = models.ForeignObject(
+        Person,
+        from_fields=['to_friend_country_id', 'to_friend_id'],
+        to_fields=['person_country_id', 'id'],
+        related_name='to_friend',
+        on_delete=models.CASCADE,
+    )