Squash some apps' migrations

isic/core/migrations/0001_default_site.py

@@ -0,0 +1,40 @@
+from django.conf import settings
+from django.db import migrations
+from django.db.backends.base.schema import BaseDatabaseSchemaEditor
+from django.db.migrations.state import StateApps
+
+
+def update_default_site(apps: StateApps, schema_editor: BaseDatabaseSchemaEditor):
+    Site = apps.get_model('sites', 'Site')  # noqa: N806
+
+    # A default site object may or may not exist.
+    # If this is a brand-new database, the post_migrate will not fire until the very end of the
+    # "migrate" command, so the sites app will not have created a default site object yet.
+    # If this is an existing database, the sites app will likely have created an default site
+    # object already.
+    Site.objects.update_or_create(
+        pk=settings.SITE_ID, defaults={'domain': 'api.isic-archive.com', 'name': 'ISIC Archive'}
+    )
+
+
+def rollback_default_site(apps: StateApps, schema_editor: BaseDatabaseSchemaEditor):
+    Site = apps.get_model('sites', 'Site')  # noqa: N806
+
+    # This is the initial value of the default site object, as populated by the sites app.
+    # If it doesn't exist for some reason, there is nothing to roll back.
+    Site.objects.filter(pk=settings.SITE_ID).update(domain='example.com', name='example.com')
+
+
+class Migration(migrations.Migration):
+    replaces = [
+        ('login', '0001_default_site'),
+    ]
+
+    dependencies = [
+        # This is the final sites app migration
+        ('sites', '0002_alter_domain_unique'),
+    ]
+
+    operations = [
+        migrations.RunPython(update_default_site, rollback_default_site),
+    ]