Support for Flask-Sqlalchemy-Lite

[samuelhwilliams]

Are there any plans to add support for Flask-Sqlalchemy-Lite?

Feels like it shouldn't be too hard to add support - possibly mostly just need to be able to pass in the basemodel directly, rather than trying to read db.Model from the sqlalchemy extension?

And update the DB queries to use native sqlalchemy constructs rather than db.session.query/etc 🤔

[samuelhwilliams]

Thrown together a very rough and ready patch to support FSL: https://github.com/samuelhwilliams/flask-session/pull/1/files

Key notes:

• If using FSL, you need to set SESSION_SQLALCHEMY_BASE_MODEL because - unlike Flask-SQLAlchemy - FSL doesn't track this itself
• Stop using the custom interface added to session by Flask-SQLAlchemy, preferring to use native SQLAlchemy constructs.

[mstewart1409]

I've also raised a PR to add support for latest FSL 0.2.1 - #284