Couldn't find Host::Managed without an ID

Couldn't find Host::Managed without an ID

---
- /opt/foreman/vendor/ruby/1.9.1/gems/activerecord-3.2.21/lib/active_record/relation/finder_methods.rb:313:in
  `find_with_ids'
- /opt/foreman/vendor/ruby/1.9.1/gems/activerecord-3.2.21/lib/active_record/relation/finder_methods.rb:107:in
  `find'
- /opt/foreman/vendor/ruby/1.9.1/gems/activerecord-3.2.21/lib/active_record/querying.rb:5:in
  `find'
- /opt/foreman/app/models/host.rb:16:in `method_missing'
- /opt/foreman/vendor/ruby/1.9.1/gems/foreman_snapshot-0.1.0/app/models/hostgroup_extensions.rb:16:in
  `block in snapshot!'
- /opt/foreman/vendor/ruby/1.9.1/gems/activerecord-3.2.21/lib/active_record/connection_adapters/abstract/query_cache.rb:43:in
  `uncached'
- /opt/foreman/vendor/ruby/1.9.1/gems/activerecord-3.2.21/lib/active_record/query_cache.rb:19:in
  `uncached'
- /opt/foreman/vendor/ruby/1.9.1/gems/foreman_snapshot-0.1.0/app/models/hostgroup_extensions.rb:16:in
  `snapshot!'
- /opt/foreman/vendor/ruby/1.9.1/gems/foreman_snapshot-0.1.0/app/lib/actions/foreman/hostgroup/snapshot.rb:17:in
  `block in run'
- /opt/foreman/app/models/concerns/foreman/thread_session.rb:73:in `as'
- /opt/foreman/vendor/ruby/1.9.1/gems/foreman_snapshot-0.1.0/app/lib/actions/foreman/hostgroup/snapshot.rb:16:in
  `run'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/action.rb:456:in `block
  (3 levels) in execute_run'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/middleware/stack.rb:26:in
  `call'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/middleware/stack.rb:26:in
  `pass'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/middleware.rb:16:in
  `pass'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/action/progress.rb:30:in
  `with_progress_calculation'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/action/progress.rb:16:in
  `run'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/middleware/stack.rb:22:in
  `call'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/middleware/world.rb:30:in
  `execute'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/action.rb:455:in `block
  (2 levels) in execute_run'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/action.rb:454:in `catch'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/action.rb:454:in `block
  in execute_run'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/action.rb:371:in `call'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/action.rb:371:in `block
  in with_error_handling'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/action.rb:371:in `catch'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/action.rb:371:in `with_error_handling'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/action.rb:449:in `execute_run'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/action.rb:236:in `execute'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/execution_plan/steps/abstract_flow_step.rb:9:in
  `block (2 levels) in execute'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/execution_plan/steps/abstract.rb:152:in
  `call'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/execution_plan/steps/abstract.rb:152:in
  `with_meta_calculation'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/execution_plan/steps/abstract_flow_step.rb:8:in
  `block in execute'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/execution_plan/steps/abstract_flow_step.rb:22:in
  `open_action'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/execution_plan/steps/abstract_flow_step.rb:7:in
  `execute'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/executors/parallel/worker.rb:20:in
  `block in on_message'
- /opt/foreman/vendor/ruby/1.9.1/gems/algebrick-0.4.0/lib/algebrick.rb:859:in `block
  in assigns'
- /opt/foreman/vendor/ruby/1.9.1/gems/algebrick-0.4.0/lib/algebrick.rb:858:in `tap'
- /opt/foreman/vendor/ruby/1.9.1/gems/algebrick-0.4.0/lib/algebrick.rb:858:in `assigns'
- /opt/foreman/vendor/ruby/1.9.1/gems/algebrick-0.4.0/lib/algebrick.rb:138:in `match_value'
- /opt/foreman/vendor/ruby/1.9.1/gems/algebrick-0.4.0/lib/algebrick.rb:116:in `block
  in match'
- /opt/foreman/vendor/ruby/1.9.1/gems/algebrick-0.4.0/lib/algebrick.rb:115:in `each'
- /opt/foreman/vendor/ruby/1.9.1/gems/algebrick-0.4.0/lib/algebrick.rb:115:in `match'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/executors/parallel/worker.rb:17:in
  `on_message'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/micro_actor.rb:82:in
  `on_envelope'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/micro_actor.rb:72:in
  `receive'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/micro_actor.rb:99:in
  `block (2 levels) in run'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/micro_actor.rb:99:in
  `loop'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/micro_actor.rb:99:in
  `block in run'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/micro_actor.rb:99:in
  `catch'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/micro_actor.rb:99:in
  `run'
- /opt/foreman/vendor/ruby/1.9.1/gems/dynflow-0.7.6/lib/dynflow/micro_actor.rb:13:in
  `block in initialize'