enum error stack trace

activerecord (4.2.3) lib/active_record/dynamic_matchers.rb:26:in `method_missing'
/Users/cj/RubymineProjects/book_store/lib/book_store/admin/books.rb:8:in `block (3 levels) in <top (required)>'
/Users/cj/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/bundler/gems/activeadmin-cdace51b2a5c/lib/active_admin/views/components/active_admin_form.rb:53:in `call'
/Users/cj/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/bundler/gems/activeadmin-cdace51b2a5c/lib/active_admin/views/components/active_admin_form.rb:53:in `block (2 levels) in inputs'
actionview (4.2.3) lib/action_view/helpers/capture_helper.rb:38:in `block in capture'
actionview (4.2.3) lib/action_view/helpers/capture_helper.rb:202:in `with_output_buffer'
actionview (4.2.3) lib/action_view/helpers/capture_helper.rb:38:in `capture'
/Users/cj/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/bundler/gems/activeadmin-cdace51b2a5c/lib/active_admin/views/components/active_admin_form.rb:52:in `block in inputs'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:31:in `block in build_tag'
arbre (1.0.3) lib/arbre/context.rb:92:in `with_current_arbre_element'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:49:in `with_current_arbre_element'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:26:in `build_tag'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:39:in `insert_tag'
/Users/cj/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/bundler/gems/activeadmin-cdace51b2a5c/lib/active_admin/views/components/active_admin_form.rb:58:in `inputs'
/Users/cj/RubymineProjects/book_store/lib/book_store/admin/books.rb:6:in `block (2 levels) in <top (required)>'
/Users/cj/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/bundler/gems/activeadmin-cdace51b2a5c/lib/active_admin/views/components/active_admin_form.rb:35:in `instance_eval'
/Users/cj/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/bundler/gems/activeadmin-cdace51b2a5c/lib/active_admin/views/components/active_admin_form.rb:35:in `build'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:28:in `block in build_tag'
arbre (1.0.3) lib/arbre/context.rb:92:in `with_current_arbre_element'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:49:in `with_current_arbre_element'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:26:in `build_tag'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:39:in `insert_tag'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:14:in `active_admin_form_for'
/Users/cj/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/bundler/gems/activeadmin-cdace51b2a5c/lib/active_admin/views/pages/form.rb:22:in `main_content'
/Users/cj/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/bundler/gems/activeadmin-cdace51b2a5c/lib/active_admin/views/pages/base.rb:91:in `block (2 levels) in build_main_content_wrapper'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:31:in `block in build_tag'
arbre (1.0.3) lib/arbre/context.rb:92:in `with_current_arbre_element'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:49:in `with_current_arbre_element'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:26:in `build_tag'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:39:in `insert_tag'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:14:in `div'
/Users/cj/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/bundler/gems/activeadmin-cdace51b2a5c/lib/active_admin/views/pages/base.rb:90:in `block in build_main_content_wrapper'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:31:in `block in build_tag'
arbre (1.0.3) lib/arbre/context.rb:92:in `with_current_arbre_element'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:49:in `with_current_arbre_element'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:26:in `build_tag'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:39:in `insert_tag'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:14:in `div'
/Users/cj/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/bundler/gems/activeadmin-cdace51b2a5c/lib/active_admin/views/pages/base.rb:89:in `build_main_content_wrapper'
/Users/cj/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/bundler/gems/activeadmin-cdace51b2a5c/lib/active_admin/views/pages/base.rb:75:in `block in build_page_content'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:31:in `block in build_tag'
arbre (1.0.3) lib/arbre/context.rb:92:in `with_current_arbre_element'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:49:in `with_current_arbre_element'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:26:in `build_tag'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:39:in `insert_tag'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:14:in `div'
/Users/cj/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/bundler/gems/activeadmin-cdace51b2a5c/lib/active_admin/views/pages/base.rb:74:in `build_page_content'
/Users/cj/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/bundler/gems/activeadmin-cdace51b2a5c/lib/active_admin/views/pages/base.rb:52:in `block (2 levels) in build_page'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:31:in `block in build_tag'
arbre (1.0.3) lib/arbre/context.rb:92:in `with_current_arbre_element'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:49:in `with_current_arbre_element'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:26:in `build_tag'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:39:in `insert_tag'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:14:in `div'
/Users/cj/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/bundler/gems/activeadmin-cdace51b2a5c/lib/active_admin/views/pages/base.rb:48:in `block in build_page'
arbre (1.0.3) lib/arbre/context.rb:92:in `with_current_arbre_element'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:49:in `with_current_arbre_element'
/Users/cj/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/bundler/gems/activeadmin-cdace51b2a5c/lib/active_admin/views/pages/base.rb:47:in `build_page'
/Users/cj/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/bundler/gems/activeadmin-cdace51b2a5c/lib/active_admin/views/pages/base.rb:10:in `build'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:30:in `block in build_tag'
arbre (1.0.3) lib/arbre/context.rb:92:in `with_current_arbre_element'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:26:in `build_tag'
arbre (1.0.3) lib/arbre/element/builder_methods.rb:39:in `insert_tag'
/Users/cj/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/bundler/gems/activeadmin-cdace51b2a5c/app/views/active_admin/resource/new.html.arb:2:in `block in ___sers_cj__rbenv_versions_______lib_ruby_gems_______bundler_gems_activeadmin_cdace__b_a_c_app_views_active_admin_resource_new_html_arb__999840704883742024_70313922719160'
arbre (1.0.3) lib/arbre/context.rb:45:in `instance_eval'
arbre (1.0.3) lib/arbre/context.rb:45:in `initialize'
/Users/cj/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/bundler/gems/activeadmin-cdace51b2a5c/app/views/active_admin/resource/new.html.arb:1:in `new'
/Users/cj/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/bundler/gems/activeadmin-cdace51b2a5c/app/views/active_admin/resource/new.html.arb:1:in `___sers_cj__rbenv_versions_______lib_ruby_gems_______bundler_gems_activeadmin_cdace__b_a_c_app_views_active_admin_resource_new_html_arb__999840704883742024_70313922719160'
actionview (4.2.3) lib/action_view/template.rb:145:in `block in render'
activesupport (4.2.3) lib/active_support/notifications.rb:164:in `block in instrument'
activesupport (4.2.3) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (4.2.3) lib/active_support/notifications.rb:164:in `instrument'
actionview (4.2.3) lib/action_view/template.rb:333:in `instrument'
actionview (4.2.3) lib/action_view/template.rb:143:in `render'
actionview (4.2.3) lib/action_view/renderer/template_renderer.rb:54:in `block (2 levels) in render_template'
actionview (4.2.3) lib/action_view/renderer/abstract_renderer.rb:39:in `block in instrument'
activesupport (4.2.3) lib/active_support/notifications.rb:164:in `block in instrument'
activesupport (4.2.3) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (4.2.3) lib/active_support/notifications.rb:164:in `instrument'
actionview (4.2.3) lib/action_view/renderer/abstract_renderer.rb:39:in `instrument'
actionview (4.2.3) lib/action_view/renderer/template_renderer.rb:53:in `block in render_template'
actionview (4.2.3) lib/action_view/renderer/template_renderer.rb:61:in `render_with_layout'
actionview (4.2.3) lib/action_view/renderer/template_renderer.rb:52:in `render_template'
actionview (4.2.3) lib/action_view/renderer/template_renderer.rb:14:in `render'
actionview (4.2.3) lib/action_view/renderer/renderer.rb:42:in `render_template'
actionview (4.2.3) lib/action_view/renderer/renderer.rb:23:in `render'
actionview (4.2.3) lib/action_view/rendering.rb:100:in `_render_template'
actionpack (4.2.3) lib/action_controller/metal/streaming.rb:217:in `_render_template'
actionview (4.2.3) lib/action_view/rendering.rb:83:in `render_to_body'
actionpack (4.2.3) lib/action_controller/metal/rendering.rb:32:in `render_to_body'
actionpack (4.2.3) lib/action_controller/metal/renderers.rb:37:in `render_to_body'
actionpack (4.2.3) lib/abstract_controller/rendering.rb:25:in `render'
actionpack (4.2.3) lib/action_controller/metal/rendering.rb:16:in `render'
actionpack (4.2.3) lib/action_controller/metal/instrumentation.rb:44:in `block (2 levels) in render'
activesupport (4.2.3) lib/active_support/core_ext/benchmark.rb:12:in `block in ms'
/Users/cj/.rbenv/versions/2.2.0/lib/ruby/2.2.0/benchmark.rb:303:in `realtime'
activesupport (4.2.3) lib/active_support/core_ext/benchmark.rb:12:in `ms'
actionpack (4.2.3) lib/action_controller/metal/instrumentation.rb:44:in `block in render'
actionpack (4.2.3) lib/action_controller/metal/instrumentation.rb:87:in `cleanup_view_runtime'
activerecord (4.2.3) lib/active_record/railties/controller_runtime.rb:25:in `cleanup_view_runtime'
actionpack (4.2.3) lib/action_controller/metal/instrumentation.rb:43:in `render'
actionpack (4.2.3) lib/action_controller/metal/implicit_render.rb:10:in `default_render'
responders (2.1.0) lib/action_controller/responder.rb:236:in `default_render'
responders (2.1.0) lib/action_controller/responder.rb:170:in `to_html'
responders (2.1.0) lib/responders/flash_responder.rb:107:in `to_html'
responders (2.1.0) lib/action_controller/responder.rb:163:in `respond'
responders (2.1.0) lib/action_controller/responder.rb:156:in `call'
responders (2.1.0) lib/action_controller/respond_with.rb:203:in `respond_with'
inherited_resources (1.6.0) lib/inherited_resources/actions.rb:19:in `new'
actionpack (4.2.3) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
actionpack (4.2.3) lib/abstract_controller/base.rb:198:in `process_action'
actionpack (4.2.3) lib/action_controller/metal/rendering.rb:10:in `process_action'
actionpack (4.2.3) lib/abstract_controller/callbacks.rb:20:in `block in process_action'
activesupport (4.2.3) lib/active_support/callbacks.rb:115:in `call'
activesupport (4.2.3) lib/active_support/callbacks.rb:115:in `call'
activesupport (4.2.3) lib/active_support/callbacks.rb:553:in `block (2 levels) in compile'
activesupport (4.2.3) lib/active_support/callbacks.rb:503:in `call'
activesupport (4.2.3) lib/active_support/callbacks.rb:503:in `call'
activesupport (4.2.3) lib/active_support/callbacks.rb:88:in `run_callbacks'
actionpack (4.2.3) lib/abstract_controller/callbacks.rb:19:in `process_action'
actionpack (4.2.3) lib/action_controller/metal/rescue.rb:29:in `process_action'
actionpack (4.2.3) lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
activesupport (4.2.3) lib/active_support/notifications.rb:164:in `block in instrument'
activesupport (4.2.3) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (4.2.3) lib/active_support/notifications.rb:164:in `instrument'
actionpack (4.2.3) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
actionpack (4.2.3) lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
activerecord (4.2.3) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (4.2.3) lib/abstract_controller/base.rb:137:in `process'
actionview (4.2.3) lib/action_view/rendering.rb:30:in `process'
actionpack (4.2.3) lib/action_controller/metal.rb:196:in `dispatch'
actionpack (4.2.3) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
actionpack (4.2.3) lib/action_controller/metal.rb:237:in `block in action'
actionpack (4.2.3) lib/action_dispatch/routing/route_set.rb:76:in `call'
actionpack (4.2.3) lib/action_dispatch/routing/route_set.rb:76:in `dispatch'
actionpack (4.2.3) lib/action_dispatch/routing/route_set.rb:45:in `serve'
actionpack (4.2.3) lib/action_dispatch/journey/router.rb:43:in `block in serve'
actionpack (4.2.3) lib/action_dispatch/journey/router.rb:30:in `each'
actionpack (4.2.3) lib/action_dispatch/journey/router.rb:30:in `serve'
actionpack (4.2.3) lib/action_dispatch/routing/route_set.rb:821:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/rack/agent_hooks.rb:30:in `traced_call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/rack/browser_monitoring.rb:32:in `traced_call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67: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'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
rack (1.6.4) lib/rack/etag.rb:24:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
rack (1.6.4) lib/rack/conditionalget.rb:25:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
rack (1.6.4) lib/rack/head.rb:13:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/flash.rb:260:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
rack (1.6.4) lib/rack/session/abstract/id.rb:225:in `context'
rack (1.6.4) lib/rack/session/abstract/id.rb:220:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/cookies.rb:560:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
activerecord (4.2.3) lib/active_record/query_cache.rb:36:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
activerecord (4.2.3) lib/active_record/connection_adapters/abstract/connection_pool.rb:653:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
activerecord (4.2.3) lib/active_record/migration.rb:377:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
activesupport (4.2.3) lib/active_support/callbacks.rb:84:in `run_callbacks'
actionpack (4.2.3) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/reloader.rb:73:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
web-console (2.2.1) lib/web_console/middleware.rb:39:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
railties (4.2.3) lib/rails/rack/logger.rb:38:in `call_app'
railties (4.2.3) lib/rails/rack/logger.rb:20:in `block in call'
activesupport (4.2.3) lib/active_support/tagged_logging.rb:68:in `block in tagged'
activesupport (4.2.3) lib/active_support/tagged_logging.rb:26:in `tagged'
activesupport (4.2.3) lib/active_support/tagged_logging.rb:68:in `tagged'
railties (4.2.3) lib/rails/rack/logger.rb:20:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/request_id.rb:21:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
rack (1.6.4) lib/rack/methodoverride.rb:22:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
rack (1.6.4) lib/rack/runtime.rb:18:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
activesupport (4.2.3) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
rack (1.6.4) lib/rack/lock.rb:17:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/static.rb:116:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
rack (1.6.4) lib/rack/sendfile.rb:113:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
railties (4.2.3) lib/rails/engine.rb:518:in `call'
railties (4.2.3) lib/rails/application.rb:165:in `call'
newrelic_rpm (3.13.0.299) lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
rack (1.6.4) lib/rack/content_length.rb:15:in `call'
thin (1.6.3) lib/thin/connection.rb:86:in `block in pre_process'
thin (1.6.3) lib/thin/connection.rb:84:in `catch'
thin (1.6.3) lib/thin/connection.rb:84:in `pre_process'
thin (1.6.3) lib/thin/connection.rb:53:in `process'
thin (1.6.3) lib/thin/connection.rb:39:in `receive_data'
eventmachine (1.0.8) lib/eventmachine.rb:193:in `run_machine'
eventmachine (1.0.8) lib/eventmachine.rb:193:in `run'
thin (1.6.3) lib/thin/backends/base.rb:73:in `start'
thin (1.6.3) lib/thin/server.rb:162:in `start'
rack (1.6.4) lib/rack/handler/thin.rb:19:in `run'
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railties (4.2.3) lib/rails/commands/commands_tasks.rb:80:in `block in server'
railties (4.2.3) lib/rails/commands/commands_tasks.rb:75:in `tap'
railties (4.2.3) lib/rails/commands/commands_tasks.rb:75:in `server'
railties (4.2.3) lib/rails/commands/commands_tasks.rb:39:in `run_command!'
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bin/rails:8:in `require'
bin/rails:8:in `<top (required)>'
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spring (1.3.6) lib/spring/client/rails.rb:28:in `call'
spring (1.3.6) lib/spring/client/command.rb:7:in `call'
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/Users/cj/.rbenv/versions/2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
/Users/cj/.rbenv/versions/2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
bin/spring:13:in `<top (required)>'
bin/rails:3:in `load'
bin/rails:3:in `<top (required)>'
-e:1:in `load'
-e:1:in `<main>'