acquisition of the lock is deferred until actually needed, it is possible that another thread or process could create a separate transaction and write to the database after the BEGIN on the current thread database instance. class PeeweeConnectionMiddleware(object): def process_request(self, request): database.connect() def process_response(self, request, response): if not database.is_closed(): SqliteDatabase('my_app.db') class PeeweeConnectionMiddleware(object): def process_request(self, req, resp): database.connect() def process_response(self, req, resp, resource): if not database.is_closed():

acquisition of the lock is deferred until actually needed, it is possible that another thread or process could create a separate transaction and write to the database after the BEGIN on the current thread peewee database instance. class PeeweeConnectionMiddleware(object): def process_request(self, request): database.connect() def process_response(self, request, response): if not database.is_closed(): database SqliteDatabase('my_app.db') class PeeweeConnectionMiddleware(object): def process_request(self, req, resp): database.connect() def process_response(self, req, resp, resource): if not database.is_closed(): database

acquisition of the lock is deferred until actually needed, it is possible that another thread or process could create a separate transaction and write to the database after the BEGIN on the current thread database instance. class PeeweeConnectionMiddleware(object): def process_request(self, request): database.connect() def process_response(self, request, response): if not database.is_closed(): SqliteDatabase('my_app.db') class PeeweeConnectionMiddleware(object): def process_request(self, req, resp): database.connect() def process_response(self, req, resp, resource): if not database.is_closed():

acquisition of the lock is deferred until actually needed, it is possible that another thread or process could create a separate transaction and write to the database after the BEGIN on the current thread peewee database instance. class PeeweeConnectionMiddleware(object): def process_request(self, request): database.connect() def process_response(self, request, response): if not database.is_closed(): database SqliteDatabase('my_app.db') class PeeweeConnectionMiddleware(object): def process_request(self, req, resp): database.connect() def process_response(self, req, resp, resource): if not database.is_closed(): database

acquisition of the lock is deferred until actually needed, it is possible that another thread or process could create a separate transaction and write to the database after the BEGIN on the current thread database instance. class PeeweeConnectionMiddleware(object): def process_request(self, request): database.connect() def process_response(self, request, response): if not database.is_closed(): SqliteDatabase('my_app.db') class PeeweeConnectionMiddleware(object): def process_request(self, req, resp): database.connect() def process_response(self, req, resp, resource): if not database.is_closed():

acquisition of the lock is deferred until actually needed, it is possible that another thread or process could create a separate transaction and write to the database after the BEGIN on the current thread peewee database instance. class PeeweeConnectionMiddleware(object): def process_request(self, request): database.connect() def process_response(self, request, response): if not database.is_closed(): database SqliteDatabase('my_app.db') class PeeweeConnectionMiddleware(object): def process_request(self, req, resp): database.connect() def process_response(self, req, resp, resource): if not database.is_closed(): database

acquisition of the lock is deferred until actually needed, it is possible that another thread or process could create a separate transaction and write to the database after the BEGIN on the current thread ): def process_request(self, request): (continues on next page) 52 Chapter 1. Contents: peewee Documentation, Release 3.3.0 (continued from previous page) database.connect() def process_response(self SqliteDatabase('my_app.db') class PeeweeConnectionMiddleware(object): def process_request(self, req, resp): database.connect() def process_response(self, req, resp, resource): if not database.is_closed(): database

acquisition of the lock is deferred until actually needed, it is possible that another thread or process could create a separate transaction and write to the database after the BEGIN on the current thread database instance. class PeeweeConnectionMiddleware(object): def process_request(self, request): database.connect() def process_response(self, request, response): if not database.is_closed(): SqliteDatabase('my_app.db') class PeeweeConnectionMiddleware(object): def process_request(self, req, resp): database.connect() def process_response(self, req, resp, resource): if not database.is_closed():

database instance. class PeeweeConnectionMiddleware(object): def process_request(self, request): database.connect() def process_response(self, request, response): if not database.is_closed(): SqliteDatabase('my_app.db') class PeeweeConnectionMiddleware(object): def process_request(self, req, resp): database.connect() def process_response(self, req, resp, resource): if not database.is_closed(): if not db.is_closed(): db.close() In your application main() make sure MyRequest is used as request_factory: def main(global_settings, **settings): config = Configurator(settings=settings

peewee database instance. class PeeweeConnectionMiddleware(object): def process_request(self, request): database.connect() def process_response(self, request, response): if not database.is_closed(): database SqliteDatabase('my_app.db') class PeeweeConnectionMiddleware(object): def process_request(self, req, resp): database.connect() def process_response(self, req, resp, resource): if not database.is_closed(): database finish(self, request): if not db.is_closed(): db.close() In your application main() make sure MyRequest is used as request_factory: def main(global_settings, **settings): config = Configurator(settings=settings