Superevents

Adding superevents to GraceDB, including the necessary models, utility functions, and API resources. This has also resulted in changes to the overall configuration and some parts of the events model.

Many models in the events app, like Labels, Tags, EventLogs, etc. were needed in a similar form for superevents. We were able to completely reuse the existing Label and Tag models for superevents. In other cases, we had to abstract the main functionality of the class into an abstract base class and then implement separate models for events and superevents, due to foreign key requirements. This should leave the current functionality of the events models unchanged.

Some portions of the events API have been modified because of one of the following reasons:

• It didn't make sense and was unnecessarily difficult to duplicate for superevents
• It was inefficient or bad

These changes are documented here: https://bugs.ligo.org/redmine/issues/6133

gracedb/migrations/sites/0002_update_site.py

@@ -20,25 +20,29 @@ SITES = {
 def update_site(apps, schema_editor):
     Site = apps.get_model('sites', 'Site')
 
-    # Get current site matching SITE_ID, should be example.com at this point
-    site1 = Site.objects.get(id=settings.SITE_ID)
+    # Get or create our new site:
+    #   If all migrations are being run at once, there shouldn't be any sites
+    #     since the initial example site is created by a post_migrate signal
+    #   If this is being run individually, then we overwrite the existing
+    #     example.com site
+    site, created = Site.objects.get_or_create(id=settings.SITE_ID)
 
     # Update with new site name and domain
-    site1.name = SITES['new']['name']
-    site1.domain = SITES['new']['domain']
-    site1.save()
+    site.name = SITES['new']['name']
+    site.domain = SITES['new']['domain']
+    site.save()
 
 
 def revert_site(apps, schema_editor):
     Site = apps.get_model('sites', 'Site')
 
     # Get current site matching SITE_ID should be ligo.org
-    site1 = Site.objects.get(id=settings.SITE_ID)
+    site = Site.objects.get(id=settings.SITE_ID)
 
     # Revert to original site
-    site1.name = SITES['old']['name']
-    site1.domain = SITES['old']['domain']
-    site1.save()
+    site.name = SITES['old']['name']
+    site.domain = SITES['old']['domain']
+    site.save()
 
 
 class Migration(migrations.Migration):