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    <p>You should handle this when you create the job:<pre><code> priority = 0 run_time = my_object.start_time Delayed::Job.enqueue(MyCustomJob.new(my_object), priority, run_time) </code></pre></p> <p><a href="https://github.com/tobi/delayed_job/wiki" rel="nofollow noreferrer">https://github.com/tobi/delayed_job/wiki</a></p> <p>If your jobs aren't running at the expected time, you may be scheduling them for UTC:</p> <p><a href="http://www.gregbenedict.com/2009/08/19/is-delayed-job-run_at-datetime-giving-you-fits/" rel="nofollow noreferrer">http://www.gregbenedict.com/2009/08/19/is-delayed-job-run_at-datetime-giving-you-fits/</a></p> <p>To check the queue for an existing job - you could do the following:</p> <pre><code> class MyCustomJob &lt; Struct.new(:object_id) def self.exists?(object_id) Delayed::Job.where(['handler = ? and failed_at is null',handler(object_id)]).count(:all) > 0 end def self.handler(object_id) "--- !ruby/struct:MyCustomJob \nobject_id: #{object_id}\n" end def perform my_object = MyObject.find(object_id) my_object.do_stuff end end </code></pre> <p>Then just check for <code>MyCustomJob.exists?(my_object.id)</code> before queueing.</p> <p>It's a little bit of a hack - edit the <code>handler</code> method as needed. I would modify the delayed_jobs table to have a class/object_id to make for cleaner code and more efficient table scans if your jobs table is large or if you do this with other types of jobs.</p> <p>This question also looks relevant:</p> <p><a href="https://stackoverflow.com/questions/3638250/how-to-cancel-scheduled-job-with-delayed-job-in-rails">How to cancel scheduled job with delayed_job in Rails?</a></p>
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    1. PODelayed_Job: accessing job metadata and/or avoiding duplicate jobs
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    1. COhm i already queue my job like this. i need to check if start_time changed on object when the job runs.
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    2. COsee edits . . .
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    3. COthanks for your reply! this is no timing problem.. lets say i've an event in a calendar.. i would like to send a reminder 10minutes before the event starts.. so theres a job in the queue for that.. someone changes the event to the next day.. so i need to check if the current job is still valid..
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