Created attachment 1016500 [details]
Driving event validation fails

Description of problem:
Validation fails for "Driving Event" while editing or creating a copy of the existing alert

Version-Release number of selected component (if applicable):
5.4.0.0.19.20150410165622_ad23806

How reproducible:
100%

Steps to Reproduce:
1. Navigate to Control ==> Explorer ==> Alerts ==> Choose an existing alert (say Datacenter VMs >10)
2. Click on Configuration ==> Edit this Alert (or) Copy this Alert
3. Change the Description and click on Save button

Actual results:
Throws error message stating "undefined method `[]' for #<MiqExpression:0x0000000b4361a0> [miq_policy/alert_edit]".  Refer the screenshot "Driving event validation fails", evm.log and production.log file for more information

Expected results:
Should validate for Driving Event field as it not selected and should throw the error message accordingly

Additional info:
evm.log:
========
[----] E, [2015-04-20T14:12:41.964458 #10918:e25ea0] ERROR -- : MIQ(miq_policy_controller-alert_edit): A Driving Event must be selected


production.log:
===============
[----] I, [2015-04-20T14:12:19.034052 #10918:e25ea0]  INFO -- : Started POST "/miq_policy/alert_field_changed/new?description=Datacenter%20VMs%20%3E%2010-renamed" for 127.0.0.1 at 2015-04-20 14:12:19 -0400
[----] I, [2015-04-20T14:12:19.037978 #10918:e25ea0]  INFO -- : Processing by MiqPolicyController#alert_field_changed as JS
[----] I, [2015-04-20T14:12:19.038075 #10918:e25ea0]  INFO -- :   Parameters: {"description"=>"Datacenter VMs > 10-renamed", "id"=>"new"}
[----] I, [2015-04-20T14:12:19.066066 #10918:e25ea0]  INFO -- : Completed 200 OK in 27.9ms (Views: 0.6ms | ActiveRecord: 1.1ms)
[----] I, [2015-04-20T14:12:41.864029 #10918:e25ea0]  INFO -- : Started POST "/miq_policy/alert_edit?button=add" for 127.0.0.1 at 2015-04-20 14:12:41 -0400
[----] I, [2015-04-20T14:12:41.944279 #10918:e25ea0]  INFO -- : Processing by MiqPolicyController#alert_edit as JS
[----] I, [2015-04-20T14:12:41.944416 #10918:e25ea0]  INFO -- :   Parameters: {"button"=>"add"}
[----] F, [2015-04-20T14:12:41.965162 #10918:e25ea0] FATAL -- : Error caught: [NoMethodError] undefined method `[]' for #<MiqExpression:0x00000010367e18>
/var/www/miq/vmdb/app/controllers/miq_policy_controller/alerts.rb:537:in `alert_valid_record?'
/var/www/miq/vmdb/app/controllers/miq_policy_controller/alerts.rb:23:in `alert_edit'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_controller/metal/implicit_render.rb:4:in `send_action'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/abstract_controller/base.rb:167:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_controller/metal/rendering.rb:10:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/abstract_controller/callbacks.rb:18:in `block in process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/activesupport/lib/active_support/callbacks.rb:557:in `_run__1555300855091572694__process_action__1121620265443633649__callbacks'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/activesupport/lib/active_support/callbacks.rb:405:in `__run_callback'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/activesupport/lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/activesupport/lib/active_support/callbacks.rb:81:in `run_callbacks'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/abstract_controller/callbacks.rb:17:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_controller/metal/rescue.rb:29:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_controller/metal/instrumentation.rb:30:in `block in process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/activesupport/lib/active_support/notifications.rb:123:in `block in instrument'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/activesupport/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/activesupport/lib/active_support/notifications.rb:123:in `instrument'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_controller/metal/instrumentation.rb:29:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_controller/metal/params_wrapper.rb:207:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/activerecord/lib/active_record/railties/controller_runtime.rb:18:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/abstract_controller/base.rb:121:in `process'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/abstract_controller/rendering.rb:45:in `process'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_controller/metal.rb:203:in `dispatch'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_controller/metal/rack_delegation.rb:14:in `dispatch'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_controller/metal.rb:246:in `block in action'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_dispatch/routing/route_set.rb:73:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_dispatch/routing/route_set.rb:73:in `dispatch'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_dispatch/routing/route_set.rb:36:in `call'
/opt/rh/cfme-gemset/gems/journey-1.0.4/lib/journey/router.rb:68:in `block in call'
/opt/rh/cfme-gemset/gems/journey-1.0.4/lib/journey/router.rb:56:in `each'
/opt/rh/cfme-gemset/gems/journey-1.0.4/lib/journey/router.rb:56:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_dispatch/routing/route_set.rb:608:in `call'
/opt/rh/cfme-gemset/gems/rack-cache-1.2/lib/rack/cache/context.rb:136:in `forward'
/opt/rh/cfme-gemset/gems/rack-cache-1.2/lib/rack/cache/context.rb:143:in `pass'
/opt/rh/cfme-gemset/gems/rack-cache-1.2/lib/rack/cache/context.rb:155:in `invalidate'
/opt/rh/cfme-gemset/gems/rack-cache-1.2/lib/rack/cache/context.rb:71:in `call!'
/opt/rh/cfme-gemset/gems/rack-cache-1.2/lib/rack/cache/context.rb:51:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
/opt/rh/cfme-gemset/gems/rack-1.4.5/lib/rack/etag.rb:23:in `call'
/opt/rh/cfme-gemset/gems/rack-1.4.5/lib/rack/conditionalget.rb:35:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_dispatch/middleware/head.rb:14:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_dispatch/middleware/params_parser.rb:21:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_dispatch/middleware/flash.rb:242:in `call'
/opt/rh/cfme-gemset/gems/rack-1.4.5/lib/rack/session/abstract/id.rb:210:in `context'
/opt/rh/cfme-gemset/gems/rack-1.4.5/lib/rack/session/abstract/id.rb:205:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_dispatch/middleware/cookies.rb:341:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/activerecord/lib/active_record/query_cache.rb:64:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb:479:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/activesupport/lib/active_support/callbacks.rb:405:in `_run__765567197915781139__call__4026112033378302818__callbacks'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/activesupport/lib/active_support/callbacks.rb:405:in `__run_callback'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/activesupport/lib/active_support/callbacks.rb:385:in `_run_call_callbacks'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/activesupport/lib/active_support/callbacks.rb:81:in `run_callbacks'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_dispatch/middleware/callbacks.rb:27:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/railties/lib/rails/rack/logger.rb:32:in `call_app'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/railties/lib/rails/rack/logger.rb:18:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_dispatch/middleware/request_id.rb:22:in `call'
/opt/rh/cfme-gemset/gems/rack-1.4.5/lib/rack/methodoverride.rb:21:in `call'
/opt/rh/cfme-gemset/gems/rack-1.4.5/lib/rack/runtime.rb:17:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/activesupport/lib/active_support/cache/strategy/local_cache.rb:72:in `call'
/opt/rh/cfme-gemset/gems/rack-1.4.5/lib/rack/lock.rb:15:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/actionpack/lib/action_dispatch/middleware/static.rb:63:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/railties/lib/rails/engine.rb:484:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/railties/lib/rails/application.rb:231:in `call'
/opt/rh/cfme-gemset/gems/rack-1.4.5/lib/rack/content_length.rb:14:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/railties/lib/rails/rack/log_tailer.rb:17:in `call'
/opt/rh/cfme-gemset/gems/thin-1.3.1/lib/thin/connection.rb:80:in `block in pre_process'
/opt/rh/cfme-gemset/gems/thin-1.3.1/lib/thin/connection.rb:78:in `catch'
/opt/rh/cfme-gemset/gems/thin-1.3.1/lib/thin/connection.rb:78:in `pre_process'
/opt/rh/cfme-gemset/gems/thin-1.3.1/lib/thin/connection.rb:53:in `process'
/opt/rh/cfme-gemset/gems/thin-1.3.1/lib/thin/connection.rb:38:in `receive_data'
/opt/rh/cfme-gemset/gems/eventmachine-1.0.7/lib/eventmachine.rb:187:in `run_machine'
/opt/rh/cfme-gemset/gems/eventmachine-1.0.7/lib/eventmachine.rb:187:in `run'
/opt/rh/cfme-gemset/gems/thin-1.3.1/lib/thin/backends/base.rb:61:in `start'
/opt/rh/cfme-gemset/gems/thin-1.3.1/lib/thin/server.rb:159:in `start'
/opt/rh/cfme-gemset/gems/rack-1.4.5/lib/rack/handler/thin.rb:13:in `run'
/opt/rh/cfme-gemset/gems/rack-1.4.5/lib/rack/server.rb:268:in `start'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/railties/lib/rails/commands/server.rb:70:in `start'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/railties/lib/rails/commands.rb:55:in `block in <top (required)>'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/railties/lib/rails/commands.rb:50:in `tap'
/opt/rh/cfme-gemset/bundler/gems/rails-8f014fba21f9/railties/lib/rails/commands.rb:50:in `<top (required)>'
script/rails:6:in `require'
script/rails:6:in `<main>'
[----] I, [2015-04-20T14:12:41.966596 #10918:e25ea0]  INFO -- :   Rendered layouts/_exception_contents.html.haml (0.3ms)
[----] I, [2015-04-20T14:12:41.967167 #10918:e25ea0]  INFO -- : Completed 200 OK in 22.6ms (Views: 1.6ms | ActiveRecord: 1.1ms)