landing_controller.rb error

NameError in LandingPageController#index
undefined local variable or method `ahoy' for #<LandingPageController:0x007fa634fee7f0>

Extracted source (around line #5):
3
4
5
6
7
          
	def index
		render layout: false
		ahoy.track "Viewed Landing", title: "Landing page viewed"
	end
end

Rails.root: /Users/andyarmstrong/Documents/Personal/andyhelloworldruby

Application Trace | Framework Trace | Full Trace
actionpack (4.1.10) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
actionpack (4.1.10) lib/abstract_controller/base.rb:189:in `process_action'
actionpack (4.1.10) lib/action_controller/metal/rendering.rb:10:in `process_action'
actionpack (4.1.10) lib/abstract_controller/callbacks.rb:20:in `block in process_action'
activesupport (4.1.10) lib/active_support/callbacks.rb:113:in `call'
activesupport (4.1.10) lib/active_support/callbacks.rb:113:in `call'
activesupport (4.1.10) lib/active_support/callbacks.rb:552:in `block (2 levels) in compile'
activesupport (4.1.10) lib/active_support/callbacks.rb:502:in `call'
activesupport (4.1.10) lib/active_support/callbacks.rb:502:in `call'
activesupport (4.1.10) lib/active_support/callbacks.rb:86:in `run_callbacks'
actionpack (4.1.10) lib/abstract_controller/callbacks.rb:19:in `process_action'
actionpack (4.1.10) lib/action_controller/metal/rescue.rb:29:in `process_action'
actionpack (4.1.10) lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
activesupport (4.1.10) lib/active_support/notifications.rb:159:in `block in instrument'
activesupport (4.1.10) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (4.1.10) lib/active_support/notifications.rb:159:in `instrument'
actionpack (4.1.10) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
actionpack (4.1.10) lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
activerecord (4.1.10) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (4.1.10) lib/abstract_controller/base.rb:136:in `process'
actionview (4.1.10) lib/action_view/rendering.rb:30:in `process'
actionpack (4.1.10) lib/action_controller/metal.rb:196:in `dispatch'
actionpack (4.1.10) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
actionpack (4.1.10) lib/action_controller/metal.rb:232:in `block in action'
actionpack (4.1.10) lib/action_dispatch/routing/route_set.rb:82:in `call'
actionpack (4.1.10) lib/action_dispatch/routing/route_set.rb:82:in `dispatch'
actionpack (4.1.10) lib/action_dispatch/routing/route_set.rb:50:in `call'
actionpack (4.1.10) lib/action_dispatch/journey/router.rb:73:in `block in call'
actionpack (4.1.10) lib/action_dispatch/journey/router.rb:59:in `each'
actionpack (4.1.10) lib/action_dispatch/journey/router.rb:59:in `call'
actionpack (4.1.10) lib/action_dispatch/routing/route_set.rb:692:in `call'
omniauth (1.2.2) lib/omniauth/strategy.rb:186:in `call!'
omniauth (1.2.2) lib/omniauth/strategy.rb:164:in `call'
warden (1.2.3) lib/warden/manager.rb:35:in `block in call'
warden (1.2.3) lib/warden/manager.rb:34:in `catch'
warden (1.2.3) lib/warden/manager.rb:34:in `call'
rack (1.5.2) lib/rack/etag.rb:23:in `call'
rack (1.5.2) lib/rack/conditionalget.rb:25:in `call'
rack (1.5.2) lib/rack/head.rb:11:in `call'
actionpack (4.1.10) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
actionpack (4.1.10) lib/action_dispatch/middleware/flash.rb:254:in `call'
rack (1.5.2) lib/rack/session/abstract/id.rb:225:in `context'
rack (1.5.2) lib/rack/session/abstract/id.rb:220:in `call'
actionpack (4.1.10) lib/action_dispatch/middleware/cookies.rb:562:in `call'
activerecord (4.1.10) lib/active_record/query_cache.rb:36:in `call'
activerecord (4.1.10) lib/active_record/connection_adapters/abstract/connection_pool.rb:621:in `call'
activerecord (4.1.10) lib/active_record/migration.rb:380:in `call'
actionpack (4.1.10) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
activesupport (4.1.10) lib/active_support/callbacks.rb:82:in `run_callbacks'
actionpack (4.1.10) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
actionpack (4.1.10) lib/action_dispatch/middleware/reloader.rb:73:in `call'
actionpack (4.1.10) lib/action_dispatch/middleware/remote_ip.rb:76:in `call'
actionpack (4.1.10) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
actionpack (4.1.10) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
railties (4.1.10) lib/rails/rack/logger.rb:38:in `call_app'
railties (4.1.10) lib/rails/rack/logger.rb:20:in `block in call'
activesupport (4.1.10) lib/active_support/tagged_logging.rb:68:in `block in tagged'
activesupport (4.1.10) lib/active_support/tagged_logging.rb:26:in `tagged'
activesupport (4.1.10) lib/active_support/tagged_logging.rb:68:in `tagged'
railties (4.1.10) lib/rails/rack/logger.rb:20:in `call'
actionpack (4.1.10) lib/action_dispatch/middleware/request_id.rb:21:in `call'
rack (1.5.2) lib/rack/methodoverride.rb:21:in `call'
rack (1.5.2) lib/rack/runtime.rb:17:in `call'
activesupport (4.1.10) lib/active_support/cache/strategy/local_cache_middleware.rb:26:in `call'
rack (1.5.2) lib/rack/lock.rb:17:in `call'
actionpack (4.1.10) lib/action_dispatch/middleware/static.rb:84:in `call'
rack (1.5.2) lib/rack/sendfile.rb:112:in `call'
railties (4.1.10) lib/rails/engine.rb:514:in `call'
railties (4.1.10) lib/rails/application.rb:144:in `call'
rack (1.5.2) lib/rack/lock.rb:17:in `call'
rack (1.5.2) lib/rack/content_length.rb:14:in `call'
rack (1.5.2) lib/rack/handler/webrick.rb:60:in `service'
/Users/andyarmstrong/.rbenv/versions/2.1.5/lib/ruby/2.1.0/webrick/httpserver.rb:138:in `service'
/Users/andyarmstrong/.rbenv/versions/2.1.5/lib/ruby/2.1.0/webrick/httpserver.rb:94:in `run'
/Users/andyarmstrong/.rbenv/versions/2.1.5/lib/ruby/2.1.0/webrick/server.rb:295:in `block in start_thread'
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