How can I use Flask-SQLAlchemy for advanced queries?

How can I use Flask-SQLAlchemy for advanced queries?

You can use Flask-SQLAlchemy to perform advanced queries by utilizing methods like filter(), join(), and subquery(). Would you like an example?

Yes, please provide an example of a complex query.

Sure! For instance, if you want to get all users who have made more than 5 orders, you can do:

from yourapp import db

result = db.session.query(User).join(Order).group_by(User.id).having(func.count(Order.id) > 5).all()

What if I want to include related data in the results?

You can use joinedload() to eagerly load related data. For example:

from sqlalchemy.orm import joinedload

result = db.session.query(User).options(joinedload(User.orders)).all()