cache the result of running bleach in the db, too slow to do on render

migrations/20150318-clean-content.py

@@ -0,0 +1,27 @@
+from config import Config
+import sqlalchemy
+import sqlalchemy.orm
+from woodwind.models import Entry
+from woodwind import util
+
+engine = sqlalchemy.create_engine(Config.SQLALCHEMY_DATABASE_URI)
+Session = sqlalchemy.orm.sessionmaker(bind=engine)
+
+try:
+    engine.execute('alter table entry add column content_cleaned text')
+except:
+    pass
+
+try:
+    session = Session()
+
+    for entry in session.query(Entry).all():
+        print('processing', entry.id)
+        entry.content_cleaned = util.clean(entry.content)
+
+    session.commit()
+except:
+    session.rollback()
+    raise
+finally:
+    session.close()