from app import db from sqlalchemy import Index from sqlalchemy.orm import backref class ReceiverStatistic(db.Model): __tablename__ = "receiver_statistics" id = db.Column(db.Integer, primary_key=True) date = db.Column(db.Date) is_trustworthy = db.Column(db.Boolean) max_distance = db.Column(db.Float(precision=2)) max_normalized_quality = db.Column(db.Float(precision=2)) messages_count = db.Column(db.Integer) coverages_count = db.Column(db.Integer) senders_count = db.Column(db.Integer) # Relations receiver_id = db.Column(db.Integer, db.ForeignKey("receivers.id", ondelete="CASCADE"), index=True) receiver = db.relationship("Receiver", foreign_keys=[receiver_id], backref=backref("statistics", order_by=date.desc())) __table_args__ = (Index('idx_receiver_statistics_uc', 'date', 'receiver_id', 'is_trustworthy', unique=True), )