You don't have to use decorators (they cause issues with circular dependencies as well, making it difficult to break up your views module). There is an add_url_

You don't have to use decorators (they cause issues with circular dependencies as well, making it difficult to break up your views module). There is an add_url_rule method you can use to register views. An ORM is tangental to Flask - there is some docs on how to use with SQLAlchemy (which also suggests WTForms for validation) but it's ORM/DB neutral, which is a good idea. However I'm warming to the idea of avoiding an ORM completely in future projects - just use a thin layer around MySQLdb or DB of choice, like tornado.database or SQLAlchemy's query API.