from app import db class CountryStats(db.Model): __tablename__ = "country_stats" id = db.Column(db.Integer, primary_key=True) date = db.Column(db.Date) # Static data aircraft_beacon_count = db.Column(db.Integer) device_count = db.Column(db.Integer) # Relations country_id = db.Column(db.Integer, db.ForeignKey("countries.gid", ondelete="SET NULL"), index=True) country = db.relationship("Country", foreign_keys=[country_id], backref=db.backref("stats", order_by="CountryStats.date.asc()"))