--- a/Allura/allura/model/__init__.py
+++ b/Allura/allura/model/__init__.py
@@ -12,13 +12,13 @@
from .filesystem import File
from .tag import TagEvent, Tag, UserTags
from .notification import Notification, Mailbox
-from .repository import Repository, Commit, Tree, Blob
+from .repository import Repository, RepositoryImplementation, Commit, Tree, Blob, CommitReference, LogCache
from .types import ArtifactReference, ArtifactReferenceType
from .session import main_doc_session, main_orm_session
from .session import project_doc_session, project_orm_session
-from .session import artifact_orm_session
+from .session import artifact_orm_session, repository_orm_session
from ming.orm.mapped_class import MappedClass
MappedClass.compile_all()