Fix verbs in manifestlist

All registry_tests now pass

data/database.py

@@ -957,7 +957,7 @@ class ServiceKey(BaseModel):
   rotation_duration = IntegerField(null=True)
   approval = ForeignKeyField(ServiceKeyApproval, null=True)
 
-
+'''
 class MediaType(BaseModel):
   """ MediaType is an enumeration of the possible formats of various objects in the data model. """
   name = CharField(index=True, unique=True)
@@ -1122,6 +1122,7 @@ class ManifestLayerScan(BaseModel):
 
 class DerivedImage(BaseModel):
   """ DerivedImage represents a Manifest transcoded into an alternative format. """
+  uuid = CharField(default=uuid_generator, unique=True)
   source_manifest = ForeignKeyField(Manifest)
   derived_manifest_json = JSONField()
   media_type = ForeignKeyField(MediaType)
@@ -1177,8 +1178,7 @@ beta_classes = set([ManifestLayerScan, Tag, BlobPlacementLocation, ManifestLayer
                     BitTorrentPieces, MediaType, Label, ManifestBlob, BlobUploading, Blob,
                     ManifestLayerDockerV1, BlobPlacementLocationPreference, ManifestListManifest,
                     Manifest, DerivedImage, BlobPlacement])
-is_model = lambda x: (inspect.isclass(x) and
-                      issubclass(x, BaseModel) and
-                      x is not BaseModel and
-                      x not in beta_classes)
+'''
+
+is_model = lambda x: inspect.isclass(x) and issubclass(x, BaseModel) and x is not BaseModel
 all_models = [model[1] for model in inspect.getmembers(sys.modules[__name__], is_model)]