--- a
+++ b/scripts/make-attachments-polymorphic.py
@@ -0,0 +1,41 @@
+import logging
+
+from pylons import c
+
+from ming.orm import ThreadLocalORMSession
+from allura import model as M
+from forgetracker import model as TM
+from forgewiki import model as WM
+from forgediscussion import model as DM
+
+log = logging.getLogger(__name__)
+
+def main():
+    dbs = dict((p.database_uri, p) for p in M.Project.query.find())
+    for db, p in sorted(dbs.items()):
+        log.info('=== Making attachments in %s polymorphic ===', db)
+        c.project = p
+        log.info('Fixing %d discussions', M.Discussion.query.find().count())
+        for d in M.Discussion.query.find():
+            for a in M.DiscussionAttachment.query.find(dict(
+                    discussion_id=d._id)):
+                log.info('%s: %s', d.url(), a.filename)
+        log.info('Fixing %d forums', DM.Forum.query.find().count())
+        for d in DM.Forum.query.find():
+            for a in DM.ForumAttachment.query.find(dict(
+                    discussion_id=d._id)):
+                log.info('%s: %s', d.url(), a.filename)
+        log.info('Fixing %d tickets', TM.Ticket.query.find().count())
+        for t in TM.Ticket.query.find():
+            for a in TM.TicketAttachment.query.find(dict(
+                    artifact_id=t._id)):
+                log.info('%s: %s', t.url(), a.filename)
+        log.info('Fixing %d wikis', WM.Page.query.find().count())
+        for p in WM.Page.query.find():
+            for a in WM.WikiAttachment.query.find(dict(
+                    artifact_id=p._id)):
+                log.info('%s: %s' % p.url(), a.filename)
+        ThreadLocalORMSession.flush_all()
+
+if __name__ == '__main__':
+    main()