from sqlalchemy.orm import Session
from sqlalchemy import and_, or_, desc, asc

from models import get_session, Ticker


def get_ticker(session: Session, contract: str):
    return session.query(Ticker).filter(Ticker.contract == contract).limit(500).all()

def get_ticker_count(session: Session, contract: str):
    return session.query(Ticker).filter(Ticker.contract == contract).count()

# 사용 예시

session = get_session()
try:
    cnt = get_ticker_count(session, "BTC_USDT")
    print(cnt)
    tickers = get_ticker(session, "BTC_USDT")
    for ticker in tickers:
        print(ticker.clast)
finally:
    session.close()