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Home/ Questions/Q 6317993
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Editorial Team
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Editorial Team
Asked: May 24, 20262026-05-24T15:35:32+00:00 2026-05-24T15:35:32+00:00

I am using delayed_job to do some background task. In between I want to

  • 0

I am using delayed_job to do some background task. In between I want to track some events. I am using mixpanel gem to track the events. In controller its working perfectly fine. But not in Delayed Job.

Code I am using

@original_message = Message.find(message_id)
@mixpanel= Mixpanel::Tracker.new("43242637426346287482", message_id, true)
@mixpanel.track_event("blank_body", {:reset_result => "sucess" })
//message_id is a unique for every request.

I have specified

  gem 'mixpanel' in gemfile

              {undefined method `[]=' for 45:Fixnum

/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/mixpanel-0.9.0/lib/mixpanel/tracker.rb:38:in clear_queue'\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/mixpanel-0.9.0/lib/mixpanel/tracker.rb:13:ininitialize’\n/Users/mohit/projects/textadda/lib/message_job.rb:109:in new'\n/Users/mohit/projects/textadda/lib/message_job.rb:109:inperform’\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/delayed_job-2.1.4/lib/delayed/backend/base.rb:87:in invoke_job'\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/delayed_job-2.1.4/lib/delayed/worker.rb:120:inrun’\n/Users/mohit/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/1.8/timeout.rb:67:in timeout'\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/delayed_job-2.1.4/lib/delayed/worker.rb:120:inrun’\n/Users/mohit/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/1.8/benchmark.rb:308:in realtime'\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/delayed_job-2.1.4/lib/delayed/worker.rb:119:inrun’\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/delayed_job-2.1.4/lib/delayed/worker.rb:177:in reserve_and_run_one_job'\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/delayed_job-2.1.4/lib/delayed/worker.rb:104:inwork_off’\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/delayed_job-2.1.4/lib/delayed/worker.rb:103:in times'\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/delayed_job-2.1.4/lib/delayed/worker.rb:103:inwork_off’\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/delayed_job-2.1.4/lib/delayed/worker.rb:78:in start'\n/Users/mohit/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/1.8/benchmark.rb:308:inrealtime’\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/delayed_job-2.1.4/lib/delayed/worker.rb:77:in start'\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/delayed_job-2.1.4/lib/delayed/worker.rb:74:inloop’\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/delayed_job-2.1.4/lib/delayed/worker.rb:74:in start'\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/delayed_job-2.1.4/lib/delayed/tasks.rb:9\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.9.2/lib/rake/task.rb:205:incall’\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.9.2/lib/rake/task.rb:205:in execute'\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.9.2/lib/rake/task.rb:200:ineach’\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.9.2/lib/rake/task.rb:200:in execute'\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.9.2/lib/rake/task.rb:158:ininvoke_with_call_chain’\n/Users/mohit/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/1.8/monitor.rb:242:in synchronize'\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.9.2/lib/rake/task.rb:151:ininvoke_with_call_chain’\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.9.2/lib/rake/task.rb:144:in invoke'\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.9.2/lib/rake/application.rb:112:ininvoke_task’\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.9.2/lib/rake/application.rb:90:in top_level'\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.9.2/lib/rake/application.rb:90:ineach’\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.9.2/lib/rake/application.rb:90:in top_level'\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.9.2/lib/rake/application.rb:129:instandard_exception_handling’\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.9.2/lib/rake/application.rb:84:in top_level'\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.9.2/lib/rake/application.rb:62:inrun’\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.9.2/lib/rake/application.rb:129:in standard_exception_handling'\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.9.2/lib/rake/application.rb:59:inrun’\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/gems/rake-0.9.2/bin/rake:32\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/bin/rake:19:in `load’\n/Users/mohit/.rvm/gems/ruby-1.8.7-p334/bin/rake:19

EDIT

I have implemented mixpanel in background process using standard get request. But I am still looking for the solution how can I use Mixpanel gem in background process.

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1 Answer

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  1. Editorial Team
    Editorial Team
    2026-05-24T15:35:32+00:00Added an answer on May 24, 2026 at 3:35 pm

    You should just be doing something like this:

    @mixpanel= Mixpanel::Tracker.new("43242637426346287482", {:REMOTE_ADDR => message_id}, true)
    @mixpanel.track_event("blank_body", {:reset_result => "sucess" })
    

    The gem expects the second variable to be the request environment, so will get the ip address that way, and send that to mixpanel.com. But I am not even sure if that is really needed, so I think that even a simple

    @mixpanel= Mixpanel::Tracker.new("43242637426346287482", {}, true)
    @mixpanel.track_event("blank_body", {:reset_result => "sucess" })
    

    should work.

    Hope this helps.

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