"""Abstract base class for match participant models."""
from app.extensions import db
from datetime import datetime


class BaseParticipant(db.Model):
    """Shared schema for match participants."""
    __abstract__ = True

    player_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False)
    added_at = db.Column(db.DateTime, default=datetime.utcnow)