executing a method from command line [cron]

rubyonrails-talk
1

Hi,

I need to do some database housekeeping periodically. Right now I have a method in my model, which I am calling from ./script/console like x = Model.update_all and it works fine.

I need to put this in cron. I know that I should be using ./script/runner, I have looked a lot for an example script encapsulating my method to do this. But could not find any. It would be great if some one can post a simple script that I can call from cron.

I am also not sure if ./script/runner calls methods in my controller or model.

thanks and regards,

raj

2

script/runner will run model methods like this script/runner -e production 'Emailer.send_daily_announcements'

Be aware that script/runner loads the Rails framework every time it runs, so it starts slow. I.E. don't use it for jobs that you run all the time. For a database monitoring daemon that runs a simple query every 5 seconds, I use a daemon that starts with './script/runner .... &' and runs constantly - the method that I call has an infinite loop. This way the environment only loads once.

Jason

Rajkumar S wrote:

3

Peter wrote:

If you are on a Mac the following:

couldn't get it to work either.

so

check this guys post because I owe him a Heineken

http://uberhamster.com/2006/9/12/invoking-ruby-on-rails-commands-via-cron-and-script-runner

Now if someone has the answer why its got to be a full path let us know

For DreamHost, and I expect for you too, the answer is that cron jobs are run with no environment (so no PATH). See here:

   http://wiki.dreamhost.com/index.php/Crontab

regards

   Justin Forder

4

Thanks every one for the helpful mails! I am now able to run the Model method from command line.

raj