Partner.site is now required

Partner instances are now required to have an associated Site for multi-tenancy.

PLAT-1715

course_discovery/apps/core/migrations/0005_auto_20170830_1246.py

+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.3 on 2017-08-30 12:46
+from __future__ import unicode_literals
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0004_partner_site'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='partner',
+            name='site',
+            field=models.OneToOneField(on_delete=django.db.models.deletion.PROTECT, to='sites.Site'),
+        ),
+    ]

course_discovery/apps/core/models.py

@@ -79,7 +79,7 @@ class Partner(TimeStampedModel):
     oidc_key = models.CharField(max_length=255, null=True, verbose_name=_('OpenID Connect Key'))
     oidc_secret = models.CharField(max_length=255, null=True, verbose_name=_('OpenID Connect Secret'))
     studio_url = models.URLField(max_length=255, null=True, blank=True, verbose_name=_('Studio URL'))
-    site = models.OneToOneField(Site, null=True, blank=True, on_delete=models.PROTECT)
+    site = models.OneToOneField(Site, on_delete=models.PROTECT)
 
     def __str__(self):
         return self.name