According to the Flask 0.12 docs:
flask.g...... Starting with Flask 0.10 this is stored on the application context and no longer on the request context which means it becomes available if only the application context is bound and not yet a request.
As far as I know, when a request comes, a application context will be created, if there isn't one. So shouldn't flask.g be available after a request has come, since the request ensures the existence of an application context?
As a bouns question: why should I store database connections on g instead of request? I know creating a application context is less "expensive" than creating a request context, but when a request comes, a request context will be created anyway.