I have a Flask app with several models. I've put them in a
models folder like so:
In each file, I've declared the Flask-SQLAlchemy equivalent on the model (class with table columns as attributes).
Now, where should I put model-related operations? Say I need to do something special before each user save; or define a much used query; or connect to third-party services.
Also, if I have some wrappers to third-party services, defined as classes, where should I put them in my app directory tree?