Python - What is the purpose of defining the maximum string length in an SQLAlchemy model?

Question

Just curious because it doesn't seem to stop a longer string from being stored in the DB like I expected it to.

Why even define it if it doesn't matter? (it must do something!)

class Message(db.Model):
    id = db.Column(db.Integer, primary_key = True)
    tag = db.Column(db.String(12))
    description = db.Column(db.String(120))
    copy = db.Column(db.String)
    voice = db.Column(db.String(24))

Answer 1

As Daniel suggested, I'm using SQLite, which does not enforce column lengths.

Thanks Daniel!