Renamed from pyblackbird_cc to alphabetlearning - everywhere

1 files changed, 63 insertions, 0 deletions

diff --git a/alphabetlearning/contrib/sites/migrations/0003_set_site_domain_and_name.py b/alphabetlearning/contrib/sites/migrations/0003_set_site_domain_and_name.py
new file mode 100644
index 0000000..f4b1cbb
--- /dev/null
+++ b/alphabetlearning/contrib/sites/migrations/0003_set_site_domain_and_name.py
@@ -0,0 +1,63 @@
+"""
+To understand why this file is here, please read:
+
+http://cookiecutter-django.readthedocs.io/en/latest/faq.html#why-is-there-a-django-contrib-sites-directory-in-cookiecutter-django
+"""
+from django.conf import settings
+from django.db import migrations
+
+
+def _update_or_create_site_with_sequence(site_model, connection, domain, name):
+    """Update or create the site with default ID and keep the DB sequence in sync."""
+    site, created = site_model.objects.update_or_create(
+        id=settings.SITE_ID,
+        defaults={
+            "domain": domain,
+            "name": name,
+        },
+    )
+    if created:
+        # We provided the ID explicitly when creating the Site entry, therefore the DB
+        # sequence to auto-generate them wasn't used and is now out of sync. If we
+        # don't do anything, we'll get a unique constraint violation the next time a
+        # site is created.
+        # To avoid this, we need to manually update DB sequence and make sure it's
+        # greater than the maximum value.
+        max_id = site_model.objects.order_by("-id").first().id
+        with connection.cursor() as cursor:
+            cursor.execute("SELECT last_value from django_site_id_seq")
+            (current_id,) = cursor.fetchone()
+            if current_id <= max_id:
+                cursor.execute(
+                    "alter sequence django_site_id_seq restart with %s",
+                    [max_id + 1],
+                )
+
+
+def update_site_forward(apps, schema_editor):
+    """Set site domain and name."""
+    Site = apps.get_model("sites", "Site")
+    _update_or_create_site_with_sequence(
+        Site,
+        schema_editor.connection,
+        "resources.joannalemon.com",
+        "pyblackbird-cc",
+    )
+
+
+def update_site_backward(apps, schema_editor):
+    """Revert site domain and name to default."""
+    Site = apps.get_model("sites", "Site")
+    _update_or_create_site_with_sequence(
+        Site,
+        schema_editor.connection,
+        "example.com",
+        "example.com",
+    )
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [("sites", "0002_alter_domain_unique")]
+
+    operations = [migrations.RunPython(update_site_forward, update_site_backward)]