Randomly showing NoMethodError: undefined method `empty?' for 0:Fixnum

问题

It works fine on my local machine but gives following error in rails_admin on Heroku, using Puma web server.

Here's how I'm using enumerize

enumerize :date_type, in: { last_date: 0, begin_date: 1 },
                        default: :last_date, predicates: { prefix: true, only: :last_date },
                        i18n_scope: 'date_type'

And it gives following error, I've pasted error from my rollbar. Refreshing the page a few times somehow works and it displays the model page just fine. But gives error most of the time. Also, using array instead of hash to define date_type, i.e. in: [:last_date, :begin_date] & not having date_type in list view of rails_admin seems to solve this issue, otherwise I get the following error.

NoMethodError: undefined method `empty?' for 0:Fixnum
- 141 non-project frames
1
File "/app/vendor/bundle/ruby/2.3.0/gems/enumerize-2.0.1/lib/enumerize/base.rb" line 98 in block in _set_default_value_for_enumerized_attributes
2
File "/app/vendor/bundle/ruby/2.3.0/gems/enumerize-2.0.1/lib/enumerize/attribute_map.rb" line 23 in block in each
3
File "/app/vendor/bundle/ruby/2.3.0/gems/enumerize-2.0.1/lib/enumerize/attribute_map.rb" line 22 in each_pair
4
File "/app/vendor/bundle/ruby/2.3.0/gems/enumerize-2.0.1/lib/enumerize/attribute_map.rb" line 22 in each
5
File "/app/vendor/bundle/ruby/2.3.0/gems/enumerize-2.0.1/lib/enumerize/base.rb" line 87 in _set_default_value_for_enumerized_attributes
6
File "/app/vendor/bundle/ruby/2.3.0/gems/enumerize-2.0.1/lib/enumerize/base.rb" line 52 in initialize
7
File "/app/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.8/lib/active_record/inheritance.rb" line 61 in new
8
File "/app/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.8/lib/active_record/inheritance.rb" line 61 in new
9
File "/app/vendor/bundle/ruby/2.3.0/gems/rails_admin-1.1.1/lib/rails_admin/config/model.rb" line 60 in block (2 levels) in <class:Model>
10
File "/app/vendor/bundle/ruby/2.3.0/gems/rails_admin-1.1.1/lib/rails_admin/config/model.rb" line 60 in each
11
File "/app/vendor/bundle/ruby/2.3.0/gems/rails_admin-1.1.1/lib/rails_admin/config/model.rb" line 60 in detect
12
File "/app/vendor/bundle/ruby/2.3.0/gems/rails_admin-1.1.1/lib/rails_admin/config/model.rb" line 60 in block in <class:Model>
13
File "/app/vendor/bundle/ruby/2.3.0/gems/rails_admin-1.1.1/lib/rails_admin/config/configurable.rb" line 66 in instance_eval
14
File "/app/vendor/bundle/ruby/2.3.0/gems/rails_admin-1.1.1/lib/rails_admin/config/configurable.rb" line 66 in block in register_instance_option
15
File "/app/vendor/bundle/ruby/2.3.0/gems/rails_admin-1.1.1/lib/rails_admin/config/lazy_model.rb" line 60 in method_missing
16
File "/app/vendor/bundle/ruby/2.3.0/gems/rails_admin-1.1.1/app/helpers/rails_admin/application_helper.rb" line 69 in wording_for
17
File "/app/vendor/bundle/ruby/2.3.0/gems/rails_admin-1.1.1/app/controllers/rails_admin/main_controller.rb" line 20 in index
18
File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_controller/metal/implicit_render.rb" line 4 in send_action
19
File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/abstract_controller/base.rb" line 198 in process_action
20
File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_controller/metal/rendering.rb" line 10 in process_action
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/abstract_controller/callbacks.rb" line 20 in block in process_action
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File "/app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.8/lib/active_support/callbacks.rb" line 117 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.8/lib/active_support/callbacks.rb" line 555 in block (2 levels) in compile
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File "/app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.8/lib/active_support/callbacks.rb" line 505 in call
25
File "/app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.8/lib/active_support/callbacks.rb" line 92 in __run_callbacks__
26
File "/app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.8/lib/active_support/callbacks.rb" line 778 in _run_process_action_callbacks
27
File "/app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.8/lib/active_support/callbacks.rb" line 81 in run_callbacks
28
File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/abstract_controller/callbacks.rb" line 19 in process_action
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_controller/metal/rescue.rb" line 29 in process_action
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_controller/metal/instrumentation.rb" line 32 in block in process_action
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File "/app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.8/lib/active_support/notifications.rb" line 164 in block in instrument
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File "/app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.8/lib/active_support/notifications/instrumenter.rb" line 20 in instrument
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File "/app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.8/lib/active_support/notifications.rb" line 164 in instrument
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_controller/metal/instrumentation.rb" line 30 in process_action
35
File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_controller/metal/params_wrapper.rb" line 250 in process_action
36
File "/app/vendor/bundle/ruby/2.3.0/gems/searchkick-2.2.0/lib/searchkick/logging.rb" line 209 in process_action
37
File "/app/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.8/lib/active_record/railties/controller_runtime.rb" line 18 in process_action
38
File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/abstract_controller/base.rb" line 137 in process
39
File "/app/vendor/bundle/ruby/2.3.0/gems/actionview-4.2.8/lib/action_view/rendering.rb" line 30 in process
40
File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_controller/metal.rb" line 196 in dispatch
41
File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_controller/metal/rack_delegation.rb" line 13 in dispatch
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_controller/metal.rb" line 237 in block in action
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/routing/route_set.rb" line 74 in dispatch
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/routing/route_set.rb" line 43 in serve
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/journey/router.rb" line 43 in block in serve
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/journey/router.rb" line 30 in each
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/journey/router.rb" line 30 in serve
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/routing/route_set.rb" line 817 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.8/lib/rails/engine.rb" line 518 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.8/lib/rails/railtie.rb" line 194 in public_send
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File "/app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.8/lib/rails/railtie.rb" line 194 in method_missing
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/routing/mapper.rb" line 51 in serve
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/journey/router.rb" line 43 in block in serve
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/journey/router.rb" line 30 in each
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/journey/router.rb" line 30 in serve
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/routing/route_set.rb" line 817 in call
57
File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/omniauth-1.6.1/lib/omniauth/strategy.rb" line 189 in call!
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File "/app/vendor/bundle/ruby/2.3.0/gems/omniauth-1.6.1/lib/omniauth/strategy.rb" line 167 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
61
File "/app/vendor/bundle/ruby/2.3.0/gems/rack-pjax-1.0.0/lib/rack/pjax.rb" line 12 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/middleware/flash.rb" line 260 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/rack/agent_hooks.rb" line 30 in traced_call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
67
File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/rack/browser_monitoring.rb" line 32 in traced_call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/warden-1.2.7/lib/warden/manager.rb" line 36 in block in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/warden-1.2.7/lib/warden/manager.rb" line 35 in catch
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File "/app/vendor/bundle/ruby/2.3.0/gems/warden-1.2.7/lib/warden/manager.rb" line 35 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/rack-1.6.5/lib/rack/etag.rb" line 24 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/rack-1.6.5/lib/rack/conditionalget.rb" line 25 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/rack-1.6.5/lib/rack/head.rb" line 13 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/remotipart-1.3.1/lib/remotipart/middleware.rb" line 32 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/middleware/params_parser.rb" line 27 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/middleware/flash.rb" line 260 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/rack-1.6.5/lib/rack/session/abstract/id.rb" line 225 in context
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File "/app/vendor/bundle/ruby/2.3.0/gems/rack-1.6.5/lib/rack/session/abstract/id.rb" line 220 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/middleware/cookies.rb" line 560 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.8/lib/active_record/query_cache.rb" line 36 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.8/lib/active_record/connection_adapters/abstract/connection_pool.rb" line 653 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/middleware/callbacks.rb" line 29 in block in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.8/lib/active_support/callbacks.rb" line 88 in __run_callbacks__
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File "/app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.8/lib/active_support/callbacks.rb" line 778 in _run_call_callbacks
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File "/app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.8/lib/active_support/callbacks.rb" line 81 in run_callbacks
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/middleware/callbacks.rb" line 27 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/middleware/remote_ip.rb" line 78 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/rollbar-2.14.1/lib/rollbar/middleware/rails/rollbar.rb" line 24 in block in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/rollbar-2.14.1/lib/rollbar.rb" line 145 in scoped
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File "/app/vendor/bundle/ruby/2.3.0/gems/rollbar-2.14.1/lib/rollbar/middleware/rails/rollbar.rb" line 22 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/middleware/debug_exceptions.rb" line 17 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/rollbar-2.14.1/lib/rollbar/middleware/rails/show_exceptions.rb" line 22 in call_with_rollbar
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/middleware/show_exceptions.rb" line 30 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.8/lib/rails/rack/logger.rb" line 38 in call_app
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File "/app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.8/lib/rails/rack/logger.rb" line 20 in block in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.8/lib/active_support/tagged_logging.rb" line 68 in block in tagged
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File "/app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.8/lib/active_support/tagged_logging.rb" line 26 in tagged
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File "/app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.8/lib/active_support/tagged_logging.rb" line 68 in tagged
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File "/app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.8/lib/rails/rack/logger.rb" line 20 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/middleware/request_id.rb" line 21 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/rack-1.6.5/lib/rack/methodoverride.rb" line 22 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/rack-1.6.5/lib/rack/runtime.rb" line 18 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.8/lib/active_support/cache/strategy/local_cache_middleware.rb" line 28 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/middleware/static.rb" line 120 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/rack-1.6.5/lib/rack/sendfile.rb" line 113 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.8/lib/action_dispatch/middleware/ssl.rb" line 24 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/rack-cors-0.4.1/lib/rack/cors.rb" line 81 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.8/lib/rails/engine.rb" line 518 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.8/lib/rails/application.rb" line 165 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/newrelic_rpm-4.0.0.332/lib/new_relic/agent/instrumentation/middleware_tracing.rb" line 92 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/puma-3.8.2/lib/puma/configuration.rb" line 224 in call
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File "/app/vendor/bundle/ruby/2.3.0/gems/puma-3.8.2/lib/puma/server.rb" line 600 in handle_request
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File "/app/vendor/bundle/ruby/2.3.0/gems/puma-3.8.2/lib/puma/server.rb" line 435 in process_client
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File "/app/vendor/bundle/ruby/2.3.0/gems/puma-3.8.2/lib/puma/server.rb" line 299 in block in run
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File "/app/vendor/bundle/ruby/2.3.0/gems/puma-3.8.2/lib/puma/thread_pool.rb" line 120 in block in spawn_thread

Don't understand what is wrong?