PCv5/app/jobs/update_progrank.py

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from app import db, crontab
from app.models.program import Program
from datetime import datetime
@crontab.job(minute="0", hour="4")
def update_progrank():
for p in Program.query.all():
p.progrank = 0
p.progrank_date = datetime.now()
db.session.merge(p)
db.session.commit()