If create jobs with scheduled_job decorator, will jobs get re-created everytime?

[Toshinaki]

I'd like to use apscheduler with FastAPI, and defining jobs with scheduled_job decorator.

The schedule instance is created before app starts and shutdown after app ends. And I'm using postgres to store jobs.

If I instantiate apscheduler like this:

from apscheduler.schedulers.asyncio import AsyncIOScheduler

scheduler = AsyncIOScheduler(...)
scheduler.start()

@scheduler.scheduled_job(...)
def job1():
    ...

@scheduler.scheduled_job(...)
def job2():
    ...

Every time the app restarts, will those jobs get added to the db? Or if jobs already exist, skip adding?

[agronholm]

If you supply an id, the new job will replace the old one, if it exists.

This decorator was a misfeature that has been removed in the 4.0 series (currently in alpha).

[Toshinaki]

So the recommended way to add jobs is add_job()?
If supply id to add_job(), and that id exists, the old job in DB will be replaced; if no id supplied, new (same) job will be created.

To avoid that, I have to manually determine ids (or name maybe?) for all jobs, and on startup, check ids, if exists, skip.
Is that right?

[Toshinaki]

Also, do you think it's possible for schedulers to accept an yaml config file, to simplify this:

scheduler = BackgroundScheduler({
    'apscheduler.jobstores.mongo': {
         'type': 'mongodb'
    },
    'apscheduler.jobstores.default': {
        'type': 'sqlalchemy',
        'url': 'sqlite:///jobs.sqlite'
    },
    'apscheduler.executors.default': {
        'class': 'apscheduler.executors.pool:ThreadPoolExecutor',
        'max_workers': '20'
    },
    'apscheduler.executors.processpool': {
        'type': 'processpool',
        'max_workers': '5'
    },
    'apscheduler.job_defaults.coalesce': 'false',
    'apscheduler.job_defaults.max_instances': '3',
    'apscheduler.timezone': 'UTC',
})