Rails 4 ActiveJobs using different enqueue adapter and having NoMethodError - ruby-on-rails-4

Question

I am trying to run an ActiveJob job from a controller method, but it fails and I can't spot the right place of the issue:
#app/controllers/users_controller.rb
1 class UsersController < ApplicationController
2 def new
3 #user = User.new
4 end1
5
6 def create
7 #user = User.create(user_params)
8 PoliciesChecksJob.new(#user.id).enqueue
9 # redirect to somewhere
10 end1
11 end
#app/jobs/policies_checks_job.rb
class PoliciesChecksJob < ActiveJob::Base
queue_as :default
def perform(user_id)
SearchPoliciesCommands.new.execute(user_id)
end
end
Logs summary:
Started POST "/users" for ::1 at 2015-03-30 15:01:03 +0100
Processing by UsersController#create as HTML
...(params)
(0.1ms) BEGIN
... (inserts the user)
(0.3ms) COMMIT
[ActiveJob] Enqueued PoliciesChecksJob (Job ID: da...e2) to Sneakers(default) with arguments: 1
Completed 500 Internal Server Error in 76ms
NoMethodError (private method `warn' called for nil:NilClass):
app/controllers/users_controller.rb:8:in `create'
I'd appreciate any thought.

Answer 1

Basically there was a little problem with the enqueue adapter:
I prefer to use Sneakers due the fact that it does work fine with RabbitMQ.
So I had to specify that I want a different enqueue adapter than the default one:
#config/application.rb
config.active_job.queue_adapter = :sneakers
Install RabbitMQ, and start it:
(preferible in a different terminal tab)
$ rabbitmq-server
Install the gem sneakers and run its deamon in (preferible other terminal tab):
$ sneakers work ActiveJob::QueueAdapters::SneakersAdapter::JobWrapper
--require app/jobs/policies_checks_job.rb