SQLAlchemy: Hybrid expression with relationship

Question

I have two Flask-SQLAlchemy models with a simple one-to-many relationship, like the minimal example below:

class School(db.Model):
    id = db.Column(db.Inte         


        

Answer 1

A much simpler approach for a simple case like this is an association proxy:

class Teacher(db.Model):
    school_name = associationproxy('school', 'name')

This supports querying (at least with ==) automatically.

I'm curious how the hybrid select() example didn't work for you, since that's the easiest way to fix this within a hybrid. And for the sake of completion, you could also use a transformer to amend the query directly rather than subquerying.