Method: ActiveJob::Exceptions::ClassMethods#discard_on

Defined in:
activejob/lib/active_job/exceptions.rb

#discard_on(*exceptions) ⇒ Object

Discard the job with no attempts to retry, if the exception is raised. This is useful when the subject of the job, like an Active Record, is no longer available, and the job is thus no longer relevant.

You can also pass a block that’ll be invoked. This block is yielded with the job instance as the first and the error instance as the second parameter.

retry_on and discard_on handlers are searched from bottom to top, and up the class hierarchy. The handler of the first class for which exception.is_a?(klass) holds true is the one invoked, if any.

Example

class SearchIndexingJob < ActiveJob::Base
  discard_on ActiveJob::DeserializationError
  discard_on(CustomAppException) do |job, error|
    ExceptionNotifier.caught(error)
  end

  def perform(record)
    # Will raise ActiveJob::DeserializationError if the record can't be deserialized
    # Might raise CustomAppException for something domain specific
  end
end



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# File 'activejob/lib/active_job/exceptions.rb', line 103

def discard_on(*exceptions)
  rescue_from(*exceptions) do |error|
    instrument :discard, error: error do
      yield self, error if block_given?
      run_after_discard_procs(error)
    end
  end
end