Django celery crontab every 30 seconds - is it even possible?

Very first example they have in the documentation is...

Example: Run the tasks.add task every 30 seconds.

from datetime import timedeltaCELERYBEAT_SCHEDULE = {    "runs-every-30-seconds": {        "task": "tasks.add",        "schedule": timedelta(seconds=30),        "args": (16, 16)    },}

If you really need to do this and you need a solution quickly, you could resort to adding: sleep into your script.(obviously you'd need to add a parameter to your script to setup the sleep time to either 0 or 30 seconds and add the script twice to crontab, once with 0 as the parameter, secondly with 30).

Please don't down vote me on this! It's a solution, albeit I'm making it very clear this is not an ideal solution.

I would go with your alternative solution by scheduling another task to enable/disable the primary task:

# tasks.pyfrom djcelery.models import PeriodicTask@app.taskdef toggle_thirty_second_task:    # you would use whatever you named your task below    thirty_second_tasks = PeriodicTask.objects.filter(name='runs-every-30-seconds')    if thirty_second_tasks:        # this returned an array, so we'll want to look at the first object        thirty_second_task = thirty_second_tasks[0]        # toggle the enabled value        thirty_second_task.enabled = not thirty_second_task.enabled        thirty_second_task.save()

Then just schedule this task using a crontab for the hours that you need to toggle. Alternatively, you could have a task scheduled to turn it on and one to turn it off and not deal with the toggling logic.

Hope this helps.

sc