Allow reconnecting characters to old users.

Addresses #1007

allianceauth/authentication/migrations/0016_ownershiprecord.py

@@ -0,0 +1,40 @@
+# Generated by Django 2.0.4 on 2018-04-14 18:28
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+def create_initial_records(apps, schema_editor):
+    OwnershipRecord = apps.get_model('authentication', 'OwnershipRecord')
+    CharacterOwnership = apps.get_model('authentication', 'CharacterOwnership')
+
+    OwnershipRecord.objects.bulk_create([
+        OwnershipRecord(user=o.user, character=o.character, owner_hash=o.owner_hash) for o in CharacterOwnership.objects.all()
+    ])
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('eveonline', '0009_on_delete'),
+        ('authentication', '0015_user_profiles'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='OwnershipRecord',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('owner_hash', models.CharField(db_index=True, max_length=28)),
+                ('created', models.DateTimeField(auto_now=True)),
+                ('character', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='ownership_records', to='eveonline.EveCharacter')),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='ownership_records', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'ordering': ['-created'],
+            },
+        ),
+        migrations.RunPython(create_initial_records, migrations.RunPython.noop)
+    ]