ruby on rails - active admin, formtastic with nested attributes, undefined method `call' for nil:NilClass -
i trying implement form many many association (with :through) using active_admin. receiving undefined method `call' nil:nilclass error message.
i new ruby , rails.
my models:
article.rb
class article < activerecord::base has_many :tagged_articles has_many :tags, :through => :tagged_articles, :source => :tag, :class_name => taggedarticle accepts_nested_attributes_for :tags end tagged_article.rb
class taggedarticle < activerecord::base belongs_to :article belongs_to :tag end tag.rb
class tag < activerecord::base has_many :tagged_articles has_many :articles, :through => :tagged_articles end view
_form.html
<%= semantic_form_for @article, :html => {:id => "new_article", :novalidate => "novalidate"} |f| %> app/admin/article.rb (active_admin file)
activeadmin.register article form partial: 'form' form |f| f.has_many :tags, heading: 'tags', allow_destroy: true, new_record: true f.actions end show # renders app/views/admin/posts/_some_partial.html.erb render 'preview' end #permit_params :title, :text, # tags_attributes: [:name] permit_params permitted = [:title, :text, tags_attributes: [:name]] # permitted << :other if resource.something? permitted end end i error (when opening form)
application trace
extracted source (around line #1): 1 insert_tag renderer_for(:new) app/admin/article.rb:6:in `block (2 levels) in <top (required)>' full trace
application trace | framework trace | full trace /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/form_builder.rb:61:in `block in has_many' formtastic (2.3.0.rc2) lib/formtastic/helpers/inputs_helper.rb:375:in `call' formtastic (2.3.0.rc2) lib/formtastic/helpers/inputs_helper.rb:375:in `block (2 levels) in inputs_for_nested_attributes' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/form_builder.rb:143:in `block in field_set_and_list_wrapping' actionpack (4.0.2) lib/action_view/helpers/capture_helper.rb:38:in `block in capture' actionpack (4.0.2) lib/action_view/helpers/capture_helper.rb:200:in `with_output_buffer' actionpack (4.0.2) lib/action_view/helpers/capture_helper.rb:38:in `capture' formtastic (2.3.0.rc2) lib/formtastic/helpers/fieldset_wrapper.rb:32:in `field_set_and_list_wrapping' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/form_builder.rb:142:in `field_set_and_list_wrapping' formtastic (2.3.0.rc2) lib/formtastic/helpers/inputs_helper.rb:292:in `inputs' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/form_builder.rb:20:in `block in inputs' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/form_builder.rb:151:in `with_new_form_buffer' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/form_builder.rb:20:in `inputs' formtastic (2.3.0.rc2) lib/formtastic/helpers/inputs_helper.rb:373:in `block in inputs_for_nested_attributes' actionpack (4.0.2) lib/action_view/helpers/capture_helper.rb:38:in `block in capture' actionpack (4.0.2) lib/action_view/helpers/capture_helper.rb:200:in `with_output_buffer' actionpack (4.0.2) lib/action_view/helpers/capture_helper.rb:38:in `capture' actionpack (4.0.2) lib/action_view/helpers/form_helper.rb:1864:in `block in fields_for_nested_model' actionpack (4.0.2) lib/action_view/helpers/capture_helper.rb:38:in `block in capture' actionpack (4.0.2) lib/action_view/helpers/capture_helper.rb:200:in `with_output_buffer' actionpack (4.0.2) lib/action_view/helpers/capture_helper.rb:38:in `capture' actionpack (4.0.2) lib/action_view/helpers/form_helper.rb:699:in `fields_for' actionpack (4.0.2) lib/action_view/helpers/form_helper.rb:1863:in `fields_for_nested_model' actionpack (4.0.2) lib/action_view/helpers/form_helper.rb:1849:in `block in fields_for_with_nested_attributes' actionpack (4.0.2) lib/action_view/helpers/form_helper.rb:1847:in `each' actionpack (4.0.2) lib/action_view/helpers/form_helper.rb:1847:in `fields_for_with_nested_attributes' actionpack (4.0.2) lib/action_view/helpers/form_helper.rb:1521:in `fields_for' formtastic (2.3.0.rc2) lib/formtastic/helpers/inputs_helper.rb:391:in `inputs_for_nested_attributes' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/form_builder.rb:176:in `block in js_for_has_many' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/form_builder.rb:151:in `with_new_form_buffer' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/form_builder.rb:176:in `js_for_has_many' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/form_builder.rb:99:in `block in has_many' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/form_builder.rb:160:in `block in without_wrapper' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/form_builder.rb:151:in `with_new_form_buffer' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/form_builder.rb:160:in `without_wrapper' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/form_builder.rb:90:in `has_many' app/admin/article.rb:6:in `block (2 levels) in <top (required)>' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/views/pages/form.rb:23:in `instance_exec' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/views/pages/form.rb:23:in `block in main_content' actionpack (4.0.2) lib/action_view/helpers/capture_helper.rb:38:in `block in capture' actionpack (4.0.2) lib/action_view/helpers/capture_helper.rb:200:in `with_output_buffer' actionpack (4.0.2) lib/action_view/helpers/capture_helper.rb:38:in `capture' actionpack (4.0.2) lib/action_view/helpers/form_helper.rb:435:in `form_for' formtastic (2.3.0.rc2) lib/formtastic/helpers/form_helper.rb:167:in `block in semantic_form_for' formtastic (2.3.0.rc2) lib/formtastic/helpers/form_helper.rb:190:in `with_custom_field_error_proc' formtastic (2.3.0.rc2) lib/formtastic/helpers/form_helper.rb:166:in `semantic_form_for' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/view_helpers/form_helper.rb:9:in `active_admin_form_for' arbre (1.0.1) lib/arbre/element.rb:175:in `method_missing' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/views/pages/form.rb:22:in `main_content' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/views/pages/base.rb:83:in `block (2 levels) in build_main_content_wrapper' arbre (1.0.1) lib/arbre/element/builder_methods.rb:31:in `block in build_tag' arbre (1.0.1) lib/arbre/context.rb:92:in `with_current_arbre_element' arbre (1.0.1) lib/arbre/element/builder_methods.rb:49:in `with_current_arbre_element' arbre (1.0.1) lib/arbre/element/builder_methods.rb:26:in `build_tag' arbre (1.0.1) lib/arbre/element/builder_methods.rb:39:in `insert_tag' arbre (1.0.1) lib/arbre/element/builder_methods.rb:14:in `div' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/views/pages/base.rb:82:in `block in build_main_content_wrapper' arbre (1.0.1) lib/arbre/element/builder_methods.rb:31:in `block in build_tag' arbre (1.0.1) lib/arbre/context.rb:92:in `with_current_arbre_element' arbre (1.0.1) lib/arbre/element/builder_methods.rb:49:in `with_current_arbre_element' arbre (1.0.1) lib/arbre/element/builder_methods.rb:26:in `build_tag' arbre (1.0.1) lib/arbre/element/builder_methods.rb:39:in `insert_tag' arbre (1.0.1) lib/arbre/element/builder_methods.rb:14:in `div' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/views/pages/base.rb:81:in `build_main_content_wrapper' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/views/pages/base.rb:65:in `block in build_page_content' arbre (1.0.1) lib/arbre/element/builder_methods.rb:31:in `block in build_tag' arbre (1.0.1) lib/arbre/context.rb:92:in `with_current_arbre_element' arbre (1.0.1) lib/arbre/element/builder_methods.rb:49:in `with_current_arbre_element' arbre (1.0.1) lib/arbre/element/builder_methods.rb:26:in `build_tag' arbre (1.0.1) lib/arbre/element/builder_methods.rb:39:in `insert_tag' arbre (1.0.1) lib/arbre/element/builder_methods.rb:14:in `div' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/views/pages/base.rb:64:in `build_page_content' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/views/pages/base.rb:47:in `block (2 levels) in build_page' arbre (1.0.1) lib/arbre/element/builder_methods.rb:31:in `block in build_tag' arbre (1.0.1) lib/arbre/context.rb:92:in `with_current_arbre_element' arbre (1.0.1) lib/arbre/element/builder_methods.rb:49:in `with_current_arbre_element' arbre (1.0.1) lib/arbre/element/builder_methods.rb:26:in `build_tag' arbre (1.0.1) lib/arbre/element/builder_methods.rb:39:in `insert_tag' arbre (1.0.1) lib/arbre/element/builder_methods.rb:14:in `div' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/views/pages/base.rb:44:in `block in build_page' arbre (1.0.1) lib/arbre/context.rb:92:in `with_current_arbre_element' arbre (1.0.1) lib/arbre/element/builder_methods.rb:49:in `with_current_arbre_element' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/views/pages/base.rb:43:in `build_page' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/lib/active_admin/views/pages/base.rb:10:in `build' arbre (1.0.1) lib/arbre/element/builder_methods.rb:30:in `block in build_tag' arbre (1.0.1) lib/arbre/context.rb:92:in `with_current_arbre_element' arbre (1.0.1) lib/arbre/element/builder_methods.rb:26:in `build_tag' arbre (1.0.1) lib/arbre/element/builder_methods.rb:39:in `insert_tag' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/app/views/active_admin/resource/new.html.arb:1:in `block in __home_javkhlan__rvm_gems_ruby_______bundler_gems_active_admin__ca___f__ab__app_views_active_admin_resource_new_html_arb__4076692881198465766_51912660' arbre (1.0.1) lib/arbre/context.rb:45:in `instance_eval' arbre (1.0.1) lib/arbre/context.rb:45:in `initialize' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/app/views/active_admin/resource/new.html.arb:1:in `new' /home/javkhlan/.rvm/gems/ruby-2.1.0/bundler/gems/active_admin-9ca081f47ab4/app/views/active_admin/resource/new.html.arb:1:in `__home_javkhlan__rvm_gems_ruby_______bundler_gems_active_admin__ca___f__ab__app_views_active_admin_resource_new_html_arb__4076692881198465766_51912660' actionpack (4.0.2) lib/action_view/template.rb:143:in `block in render' activesupport (4.0.2) lib/active_support/notifications.rb:161:in `instrument' actionpack (4.0.2) lib/action_view/template.rb:141:in `render' actionpack (4.0.2) lib/action_view/renderer/template_renderer.rb:49:in `block (2 levels) in render_template' actionpack (4.0.2) lib/action_view/renderer/abstract_renderer.rb:38:in `block in instrument' activesupport (4.0.2) lib/active_support/notifications.rb:159:in `block in instrument' activesupport (4.0.2) lib/active_support/notifications/instrumenter.rb:20:in `instrument' activesupport (4.0.2) lib/active_support/notifications.rb:159:in `instrument' actionpack (4.0.2) lib/action_view/renderer/abstract_renderer.rb:38:in `instrument' actionpack (4.0.2) lib/action_view/renderer/template_renderer.rb:48:in `block in render_template' actionpack (4.0.2) lib/action_view/renderer/template_renderer.rb:56:in `render_with_layout' actionpack (4.0.2) lib/action_view/renderer/template_renderer.rb:47:in `render_template' actionpack (4.0.2) lib/action_view/renderer/template_renderer.rb:17:in `render' actionpack (4.0.2) lib/action_view/renderer/renderer.rb:42:in `render_template' actionpack (4.0.2) lib/action_view/renderer/renderer.rb:23:in `render' actionpack (4.0.2) lib/abstract_controller/rendering.rb:127:in `_render_template' actionpack (4.0.2) lib/action_controller/metal/streaming.rb:219:in `_render_template' actionpack (4.0.2) lib/abstract_controller/rendering.rb:120:in `render_to_body' actionpack (4.0.2) lib/action_controller/metal/rendering.rb:33:in `render_to_body' actionpack (4.0.2) lib/action_controller/metal/renderers.rb:26:in `render_to_body' actionpack (4.0.2) lib/abstract_controller/rendering.rb:97:in `render' actionpack (4.0.2) lib/action_controller/metal/rendering.rb:16:in `render' actionpack (4.0.2) lib/action_controller/metal/instrumentation.rb:41:in `block (2 levels) in render' activesupport (4.0.2) lib/active_support/core_ext/benchmark.rb:12:in `block in ms' /home/javkhlan/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/benchmark.rb:294:in `realtime' activesupport (4.0.2) lib/active_support/core_ext/benchmark.rb:12:in `ms' actionpack (4.0.2) lib/action_controller/metal/instrumentation.rb:41:in `block in render' actionpack (4.0.2) lib/action_controller/metal/instrumentation.rb:84:in `cleanup_view_runtime' activerecord (4.0.2) lib/active_record/railties/controller_runtime.rb:25:in `cleanup_view_runtime' actionpack (4.0.2) lib/action_controller/metal/instrumentation.rb:40:in `render' actionpack (4.0.2) lib/action_controller/metal/implicit_render.rb:10:in `default_render' actionpack (4.0.2) lib/action_controller/metal/responder.rb:233:in `default_render' actionpack (4.0.2) lib/action_controller/metal/responder.rb:161:in `to_html' responders (1.0.0) lib/responders/flash_responder.rb:104:in `to_html' actionpack (4.0.2) lib/action_controller/metal/responder.rb:154:in `respond' actionpack (4.0.2) lib/action_controller/metal/responder.rb:147:in `call' actionpack (4.0.2) lib/action_controller/metal/mime_responds.rb:330:in `respond_with' inherited_resources (1.4.1) lib/inherited_resources/actions.rb:19:in `new' actionpack (4.0.2) lib/action_controller/metal/implicit_render.rb:4:in `send_action' actionpack (4.0.2) lib/abstract_controller/base.rb:189:in `process_action' actionpack (4.0.2) lib/action_controller/metal/rendering.rb:10:in `process_action' actionpack (4.0.2) lib/abstract_controller/callbacks.rb:18:in `block in process_action' activesupport (4.0.2) lib/active_support/callbacks.rb:433:in `_run__1569366334490291269__process_action__callbacks' activesupport (4.0.2) lib/active_support/callbacks.rb:80:in `run_callbacks' actionpack (4.0.2) lib/abstract_controller/callbacks.rb:17:in `process_action' actionpack (4.0.2) lib/action_controller/metal/rescue.rb:29:in `process_action' actionpack (4.0.2) lib/action_controller/metal/instrumentation.rb:31:in `block in process_action' activesupport (4.0.2) lib/active_support/notifications.rb:159:in `block in instrument' activesupport (4.0.2) lib/active_support/notifications/instrumenter.rb:20:in `instrument' activesupport (4.0.2) lib/active_support/notifications.rb:159:in `instrument' actionpack (4.0.2) lib/action_controller/metal/instrumentation.rb:30:in `process_action' actionpack (4.0.2) lib/action_controller/metal/params_wrapper.rb:245:in `process_action' activerecord (4.0.2) lib/active_record/railties/controller_runtime.rb:18:in `process_action' actionpack (4.0.2) lib/abstract_controller/base.rb:136:in `process' actionpack (4.0.2) lib/abstract_controller/rendering.rb:44:in `process' actionpack (4.0.2) lib/action_controller/metal.rb:195:in `dispatch' actionpack (4.0.2) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch' actionpack (4.0.2) lib/action_controller/metal.rb:231:in `block in action' actionpack (4.0.2) lib/action_dispatch/routing/route_set.rb:80:in `call' actionpack (4.0.2) lib/action_dispatch/routing/route_set.rb:80:in `dispatch' actionpack (4.0.2) lib/action_dispatch/routing/route_set.rb:48:in `call' actionpack (4.0.2) lib/action_dispatch/journey/router.rb:71:in `block in call' actionpack (4.0.2) lib/action_dispatch/journey/router.rb:59:in `each' actionpack (4.0.2) lib/action_dispatch/journey/router.rb:59:in `call' actionpack (4.0.2) lib/action_dispatch/routing/route_set.rb:680: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 (4.0.2) lib/action_dispatch/middleware/params_parser.rb:27:in `call' actionpack (4.0.2) lib/action_dispatch/middleware/flash.rb:241: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 (4.0.2) lib/action_dispatch/middleware/cookies.rb:486:in `call' activerecord (4.0.2) lib/active_record/query_cache.rb:36:in `call' activerecord (4.0.2) lib/active_record/connection_adapters/abstract/connection_pool.rb:626:in `call' activerecord (4.0.2) lib/active_record/migration.rb:369:in `call' actionpack (4.0.2) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call' activesupport (4.0.2) lib/active_support/callbacks.rb:373:in `_run__782737588198479971__call__callbacks' activesupport (4.0.2) lib/active_support/callbacks.rb:80:in `run_callbacks' actionpack (4.0.2) lib/action_dispatch/middleware/callbacks.rb:27:in `call' actionpack (4.0.2) lib/action_dispatch/middleware/reloader.rb:64:in `call' actionpack (4.0.2) lib/action_dispatch/middleware/remote_ip.rb:76:in `call' actionpack (4.0.2) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call' actionpack (4.0.2) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call' railties (4.0.2) lib/rails/rack/logger.rb:38:in `call_app' railties (4.0.2) lib/rails/rack/logger.rb:20:in `block in call' activesupport (4.0.2) lib/active_support/tagged_logging.rb:67:in `block in tagged' activesupport (4.0.2) lib/active_support/tagged_logging.rb:25:in `tagged' activesupport (4.0.2) lib/active_support/tagged_logging.rb:67:in `tagged' railties (4.0.2) lib/rails/rack/logger.rb:20:in `call' actionpack (4.0.2) 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 (4.0.2) lib/active_support/cache/strategy/local_cache.rb:83:in `call' rack (1.5.2) lib/rack/lock.rb:17:in `call' actionpack (4.0.2) lib/action_dispatch/middleware/static.rb:64:in `call' rack (1.5.2) lib/rack/sendfile.rb:112:in `call' railties (4.0.2) lib/rails/engine.rb:511:in `call' railties (4.0.2) lib/rails/application.rb:97: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' /home/javkhlan/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/webrick/httpserver.rb:138:in `service' /home/javkhlan/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/webrick/httpserver.rb:94:in `run' /home/javkhlan/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/webrick/server.rb:295:in `block in start_thread' any idea on how can make working?
i think reason nilclass error there no assigned fields nested form.
adding
f.has_many :tags |cf| cf.input :tag, :label => "tag" end solved nilclass problem
in end, following code worked. , there no need wirte _form.html.erb in particular case.
form |f| f.has_many :tags |cf| cf.input :tag, :label => "tag" end f.actions end
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