Later migration changed one of the tables, so make local copies

util/migrate/backfill_v1_metadata.py

@@ -2,8 +2,10 @@ import logging
 
 from peewee import JOIN_LEFT_OUTER
 
-from data.database import (Image, ImageStorage, ImageStoragePlacement, ImageStorageLocation, db,
-                           db_for_update)
+from peewee import (CharField, BigIntegerField, BooleanField, ForeignKeyField, DateTimeField,
+                    TextField)
+
+from data.database import BaseModel, db, db_for_update
 from app import app, storage
 from data import model
 
@@ -11,6 +13,48 @@ from data import model
 logger = logging.getLogger(__name__)
 
 
+class Repository(BaseModel):
+  pass
+
+
+# Vendor the information from tables we will be writing to at the time of this migration
+class ImageStorage(BaseModel):
+  uuid = CharField(index=True, unique=True)
+  checksum = CharField(null=True)
+  image_size = BigIntegerField(null=True)
+  uncompressed_size = BigIntegerField(null=True)
+  uploading = BooleanField(default=True, null=True)
+
+
+class Image(BaseModel):
+  # This class is intentionally denormalized. Even though images are supposed
+  # to be globally unique we can't treat them as such for permissions and
+  # security reasons. So rather than Repository <-> Image being many to many
+  # each image now belongs to exactly one repository.
+  docker_image_id = CharField(index=True)
+  repository = ForeignKeyField(Repository)
+
+  # '/' separated list of ancestory ids, e.g. /1/2/6/7/10/
+  ancestors = CharField(index=True, default='/', max_length=64535, null=True)
+
+  storage = ForeignKeyField(ImageStorage, index=True, null=True)
+
+  created = DateTimeField(null=True)
+  comment = TextField(null=True)
+  command = TextField(null=True)
+  aggregate_size = BigIntegerField(null=True)
+  v1_json_metadata = TextField(null=True)
+
+
+class ImageStorageLocation(BaseModel):
+  name = CharField(unique=True, index=True)
+
+
+class ImageStoragePlacement(BaseModel):
+  storage = ForeignKeyField(ImageStorage)
+  location = ForeignKeyField(ImageStorageLocation)
+
+
 def image_json_path(storage_uuid):
   base_path = storage.image_path(storage_uuid)
   return '{0}json'.format(base_path)
@@ -19,6 +63,7 @@ def image_json_path(storage_uuid):
 def backfill_v1_metadata():
   """ Copies metadata from image storages to their images. """
   logger.debug('Image v1 metadata backfill: Began execution')
+
   while True:
     batch_image_ids = list(Image
                            .select(Image.id)