Add a script to backfill placements.

tools/backfillplacements.py

@@ -0,0 +1,26 @@
+import logging
+
+logging.basicConfig(level=logging.DEBUG)
+
+from data.database import ImageStorage, ImageStoragePlacement, ImageStorageLocation
+from peewee import *
+
+from app import app
+
+logger = logging.getLogger(__name__)
+
+GROUP_SIZE = 1000
+
+storage_needing_placements = (ImageStorage
+  .select()
+  .join(ImageStoragePlacement, JOIN_LEFT_OUTER)
+  .group_by(ImageStorage)
+  .having(fn.Count(ImageStoragePlacement.id) == 0))
+
+default_location = ImageStorageLocation.get(name=app.config['DS_BACKFILL_LOCATION'])
+
+while storage_needing_placements.count() > 0:
+  logger.debug('Starting group of %s', GROUP_SIZE)
+  for needs_placement in list(storage_needing_placements.limit(GROUP_SIZE)):
+    logger.debug('Adding placement: %s', needs_placement.id)
+    ImageStoragePlacement.create(storage=needs_placement, location=default_location)