NoMethodError: undefined method `order' for #<Hash:0x007f9de15e59d0>

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NoMethodError: undefined method `order' for #<Hash:0x007f9de15e59d0>
  File "/Users/thomaskuhnert/develop/zelos/app/controllers/admin/bills_controller.rb", line 7, in index
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/action_controller/metal/basic_implicit_render.rb", line 4, in send_action
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/abstract_controller/base.rb", line 188, in process_action
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/action_controller/metal/rendering.rb", line 30, in process_action
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/abstract_controller/callbacks.rb", line 20, in block in process_action
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/activesupport-5.0.1/lib/active_support/callbacks.rb", line 126, in call
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/activesupport-5.0.1/lib/active_support/callbacks.rb", line 126, in call
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/activesupport-5.0.1/lib/active_support/callbacks.rb", line 506, in block (2 levels) in compile
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/activesupport-5.0.1/lib/active_support/callbacks.rb", line 455, in call
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/activesupport-5.0.1/lib/active_support/callbacks.rb", line 455, in call
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/activesupport-5.0.1/lib/active_support/callbacks.rb", line 101, in __run_callbacks__
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/activesupport-5.0.1/lib/active_support/callbacks.rb", line 750, in _run_process_action_callbacks
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/activesupport-5.0.1/lib/active_support/callbacks.rb", line 90, in run_callbacks
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/abstract_controller/callbacks.rb", line 19, in process_action
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/action_controller/metal/rescue.rb", line 20, in process_action
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/action_controller/metal/instrumentation.rb", line 32, in block in process_action
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/activesupport-5.0.1/lib/active_support/notifications.rb", line 164, in block in instrument
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb", line 21, in instrument
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/activesupport-5.0.1/lib/active_support/notifications.rb", line 164, in instrument
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/action_controller/metal/instrumentation.rb", line 30, in process_action
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/action_controller/metal/params_wrapper.rb", line 248, in process_action
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/activerecord-5.0.1/lib/active_record/railties/controller_runtime.rb", line 18, in process_action
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/abstract_controller/base.rb", line 126, in process
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionview-5.0.1/lib/action_view/rendering.rb", line 30, in process
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/action_controller/metal.rb", line 190, in dispatch
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/action_controller/metal.rb", line 262, in dispatch
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/action_dispatch/routing/route_set.rb", line 50, in dispatch
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/action_dispatch/routing/route_set.rb", line 32, in serve
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/action_dispatch/journey/router.rb", line 39, in block in serve
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/action_dispatch/journey/router.rb", line 26, in each
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/action_dispatch/journey/router.rb", line 26, in serve
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/action_dispatch/routing/route_set.rb", line 725, in call
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/warden-1.2.7/lib/warden/manager.rb", line 36, in block in call
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/warden-1.2.7/lib/warden/manager.rb", line 35, in catch
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/warden-1.2.7/lib/warden/manager.rb", line 35, in call
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/rack-2.0.1/lib/rack/etag.rb", line 25, in call
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/rack-2.0.1/lib/rack/conditional_get.rb", line 25, in call
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/rack-2.0.1/lib/rack/head.rb", line 12, in call
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/rack-2.0.1/lib/rack/session/abstract/id.rb", line 222, in context
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/rack-2.0.1/lib/rack/session/abstract/id.rb", line 216, in call
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/action_dispatch/middleware/cookies.rb", line 613, in call
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/activerecord-5.0.1/lib/active_record/migration.rb", line 553, in call
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/action_dispatch/middleware/callbacks.rb", line 38, in block in call
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/activesupport-5.0.1/lib/active_support/callbacks.rb", line 97, in __run_callbacks__
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/activesupport-5.0.1/lib/active_support/callbacks.rb", line 750, in _run_call_callbacks
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/activesupport-5.0.1/lib/active_support/callbacks.rb", line 90, in run_callbacks
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/action_dispatch/middleware/callbacks.rb", line 36, in call
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/action_dispatch/middleware/executor.rb", line 12, in call
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/actionpack-5.0.1/lib/action_dispatch/middleware/remote_ip.rb", line 79, in call
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/rollbar-2.14.0/lib/rollbar/middleware/rails/rollbar.rb", line 24, in block in call
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/rollbar-2.14.0/lib/rollbar.rb", line 145, in scoped
  File "/Users/thomaskuhnert/.rvm/gems/ruby-2.2.5/gems/rollb