flask_session.py 文件源码

def __init__(self, app, db, table, key_prefix):
        if db is None:
            from flask_sqlalchemy import SQLAlchemy
            db = SQLAlchemy(app)
        self.db = db
        self.key_prefix = key_prefix

        class Session(self.db.Model):
            __tablename__ = table

            id = self.db.Column(self.db.Integer, primary_key=True)
            session_id = self.db.Column(self.db.String(256), unique=True)
            data = self.db.Column(self.db.LargeBinary)
            expiry = self.db.Column(self.db.DateTime)

            def __init__(self, session_id, data, expiry):
                self.session_id = session_id
                self.data = data
                self.expiry = expiry

            def __repr__(self):
                return '<Session data %s>' % self.data

        self.db.create_all()
        self.sql_session_model = Session