Convert V2's tag endpoints to use the new data model interface

data/registry_model/datatypes.py

@@ -117,6 +117,11 @@ class Tag(datatype('Tag', ['name', 'reversion', 'manifest_digest', 'lifetime_sta
     """
     return legacy_image
 
+  @property
+  def id(self):
+    """ The ID of this tag for pagination purposes only. """
+    return self._db_id
+
 
 class Manifest(datatype('Manifest', ['digest', 'media_type', 'manifest_bytes'])):
   """ Manifest represents a manifest in a repository. """

data/registry_model/interface.py

@@ -95,7 +95,9 @@ class RegistryDataInterface(object):
     """
 
   @abstractmethod
-  def list_repository_tags(self, repository_ref, include_legacy_images=False):
+  def list_repository_tags(self, repository_ref, include_legacy_images=False,
+                           start_pagination_id=None,
+                           limit=None):
     """
     Returns a list of all the active tags in the repository. Note that this can be a *heavy*
     operation on repositories with a lot of tags, and should be avoided for more targetted

data/registry_model/registry_pre_oci_model.py

@@ -287,7 +287,9 @@ class PreOCIModel(RegistryDataInterface):
     """
     return Label.for_label(model.label.delete_manifest_label(label_uuid, manifest._db_id))
 
-  def list_repository_tags(self, repository_ref, include_legacy_images=False):
+  def list_repository_tags(self, repository_ref, include_legacy_images=False,
+                           start_pagination_id=None,
+                           limit=None):
     """
     Returns a list of all the active tags in the repository. Note that this can be a *heavy*
     operation on repositories with a lot of tags, and should be avoided for more targetted
@@ -296,7 +298,7 @@ class PreOCIModel(RegistryDataInterface):
     # NOTE: include_legacy_images isn't used here because `list_active_repo_tags` includes the
     # information already, so we might as well just use it. However, the new model classes will
     # *not* include it by default, so we make it a parameter now.
-    tags = model.tag.list_active_repo_tags(repository_ref._db_id)
+    tags = model.tag.list_active_repo_tags(repository_ref._db_id, start_pagination_id, limit)
     return [Tag.for_repository_tag(tag,
                                    legacy_image=LegacyImage.for_image(tag.image),
                                    manifest_digest=(tag.tagmanifest.digest