Gemcountry_state_select undefined method `country' for nil:NilClass

Zielona szkoła
1

Cześć
Chcę dodać w widoku pola wyboru kraju, stanu, miasta uzywając gem-a city_state (przy gem coutry_state_select jest ten błąd). O ile bez problemu tworzy się lista rozwijalna z państwami:
<td> <%= form.select :country, CS.get, class: "form-control" %></td>
to próba dodania regionu(states):
<td> <%= form.select :vivodeship, CS.states(country), class: "form-control" %></td>
wywołuje błąd jak w temacie.
Będę wdzięczny za wskazówki, co może być przyczyną.

2

Wklej cały stacktrace (backtrace/callstack) z błędu.

3

Aplikacja nie wie co to country. Prawdopodobnie chcesz ze zmiennej instancji jaką użyłeś w form_for wyciągać country więc powinno być coś na wzór

CS.states(@sth.country)

zamiast

CS.states(country)

lub statycznie wpisać konkretny kraj

CS.states(:us)
4 
 app/views/available_coaches/new.html.erb:109
actionview (6.1.3.2) lib/action_view/helpers/capture_helper.rb:45:in `block in capture'
actionview (6.1.3.2) lib/action_view/helpers/capture_helper.rb:209:in `with_output_buffer'
actionview (6.1.3.2) lib/action_view/helpers/capture_helper.rb:45:in `capture'
actionview (6.1.3.2) lib/action_view/helpers/form_helper.rb:450:in `form_for'
app/views/available_coaches/new.html.erb:4
actionview (6.1.3.2) lib/action_view/base.rb:247:in `public_send'
actionview (6.1.3.2) lib/action_view/base.rb:247:in `_run'
actionview (6.1.3.2) lib/action_view/template.rb:154:in `block in render'
activesupport (6.1.3.2) lib/active_support/notifications.rb:205:in `instrument'
actionview (6.1.3.2) lib/action_view/template.rb:345:in `instrument_render_template'
actionview (6.1.3.2) lib/action_view/template.rb:152:in `render'
actionview (6.1.3.2) lib/action_view/renderer/template_renderer.rb:61:in `block (2 levels) in render_template'
activesupport (6.1.3.2) lib/active_support/notifications.rb:203:in `block in instrument'
activesupport (6.1.3.2) lib/active_support/notifications/instrumenter.rb:24:in `instrument'
activesupport (6.1.3.2) lib/active_support/notifications.rb:203:in `instrument'
actionview (6.1.3.2) lib/action_view/renderer/template_renderer.rb:56:in `block in render_template'
actionview (6.1.3.2) lib/action_view/renderer/template_renderer.rb:71:in `block in render_with_layout'
activesupport (6.1.3.2) lib/active_support/notifications.rb:203:in `block in instrument'
activesupport (6.1.3.2) lib/active_support/notifications/instrumenter.rb:24:in `instrument'
activesupport (6.1.3.2) lib/active_support/notifications.rb:203:in `instrument'
actionview (6.1.3.2) lib/action_view/renderer/template_renderer.rb:70:in `render_with_layout'
actionview (6.1.3.2) lib/action_view/renderer/template_renderer.rb:55:in `render_template'
actionview (6.1.3.2) lib/action_view/renderer/template_renderer.rb:11:in `render'
actionview (6.1.3.2) lib/action_view/renderer/renderer.rb:61:in `render_template_to_object'
actionview (6.1.3.2) lib/action_view/renderer/renderer.rb:29:in `render_to_object'
actionview (6.1.3.2) lib/action_view/rendering.rb:117:in `block in _render_template'
actionview (6.1.3.2) lib/action_view/base.rb:273:in `in_rendering_context'
actionview (6.1.3.2) lib/action_view/rendering.rb:116:in `_render_template'
actionpack (6.1.3.2) lib/action_controller/metal/streaming.rb:218:in `_render_template'
actionview (6.1.3.2) lib/action_view/rendering.rb:103:in `render_to_body'
actionpack (6.1.3.2) lib/action_controller/metal/rendering.rb:52:in `render_to_body'
actionpack (6.1.3.2) lib/action_controller/metal/renderers.rb:142:in `render_to_body'
actionpack (6.1.3.2) lib/abstract_controller/rendering.rb:25:in `render'
actionpack (6.1.3.2) lib/action_controller/metal/rendering.rb:36:in `render'
actionpack (6.1.3.2) lib/action_controller/metal/instrumentation.rb:46:in `block (2 levels) in render'
/usr/share/rvm/rubies/ruby-2.7.1/lib/ruby/2.7.0/benchmark.rb:308:in `realtime'
activesupport (6.1.3.2) lib/active_support/core_ext/benchmark.rb:14:in `ms'
actionpack (6.1.3.2) lib/action_controller/metal/instrumentation.rb:46:in `block in render'
actionpack (6.1.3.2) lib/action_controller/metal/instrumentation.rb:86:in `cleanup_view_runtime'
activerecord (6.1.3.2) lib/active_record/railties/controller_runtime.rb:34:in `cleanup_view_runtime'
actionpack (6.1.3.2) lib/action_controller/metal/instrumentation.rb:45:in `render'
actionpack (6.1.3.2) lib/action_controller/metal/implicit_render.rb:35:in `default_render'
actionpack (6.1.3.2) lib/action_controller/metal/basic_implicit_render.rb:6:in `block in send_action'
actionpack (6.1.3.2) lib/action_controller/metal/basic_implicit_render.rb:6:in `tap'
actionpack (6.1.3.2) lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
actionpack (6.1.3.2) lib/abstract_controller/base.rb:228:in `process_action'
actionpack (6.1.3.2) lib/action_controller/metal/rendering.rb:30:in `process_action'
actionpack (6.1.3.2) lib/abstract_controller/callbacks.rb:42:in `block in process_action'
activesupport (6.1.3.2) lib/active_support/callbacks.rb:117:in `block in run_callbacks'
actiontext (6.1.3.2) lib/action_text/rendering.rb:20:in `with_renderer'
actiontext (6.1.3.2) lib/action_text/engine.rb:55:in `block (4 levels) in <class:Engine>'
activesupport (6.1.3.2) lib/active_support/callbacks.rb:126:in `instance_exec'
activesupport (6.1.3.2) lib/active_support/callbacks.rb:126:in `block in run_callbacks'
activesupport (6.1.3.2) lib/active_support/callbacks.rb:137:in `run_callbacks'
actionpack (6.1.3.2) lib/abstract_controller/callbacks.rb:41:in `process_action'
actionpack (6.1.3.2) lib/action_controller/metal/rescue.rb:22:in `process_action'
actionpack (6.1.3.2) lib/action_controller/metal/instrumentation.rb:34:in `block in process_action'
activesupport (6.1.3.2) lib/active_support/notifications.rb:203:in `block in instrument'
activesupport (6.1.3.2) lib/active_support/notifications/instrumenter.rb:24:in `instrument'
activesupport (6.1.3.2) lib/active_support/notifications.rb:203:in `instrument'
actionpack (6.1.3.2) lib/action_controller/metal/instrumentation.rb:33:in `process_action'
actionpack (6.1.3.2) lib/action_controller/metal/params_wrapper.rb:249:in `process_action'
activerecord (6.1.3.2) lib/active_record/railties/controller_runtime.rb:27:in `process_action'
actionpack (6.1.3.2) lib/abstract_controller/base.rb:165:in `process'
actionview (6.1.3.2) lib/action_view/rendering.rb:39:in `process'
actionpack (6.1.3.2) lib/action_controller/metal.rb:190:in `dispatch'
actionpack (6.1.3.2) lib/action_controller/metal.rb:254:in `dispatch'
actionpack (6.1.3.2) lib/action_dispatch/routing/route_set.rb:50:in `dispatch'
actionpack (6.1.3.2) lib/action_dispatch/routing/route_set.rb:33:in `serve'
actionpack (6.1.3.2) lib/action_dispatch/journey/router.rb:50:in `block in serve'
actionpack (6.1.3.2) lib/action_dispatch/journey/router.rb:32:in `each'
actionpack (6.1.3.2) lib/action_dispatch/journey/router.rb:32:in `serve'
actionpack (6.1.3.2) lib/action_dispatch/routing/route_set.rb:842:in `call'
warden (1.2.9) lib/warden/manager.rb:36:in `block in call'
warden (1.2.9) lib/warden/manager.rb:34:in `catch'
warden (1.2.9) lib/warden/manager.rb:34:in `call'
rack (2.2.3) lib/rack/tempfile_reaper.rb:15:in `call'
rack (2.2.3) lib/rack/etag.rb:27:in `call'
rack (2.2.3) lib/rack/conditional_get.rb:27:in `call'
rack (2.2.3) lib/rack/head.rb:12:in `call'
actionpack (6.1.3.2) lib/action_dispatch/http/permissions_policy.rb:22:in `call'
actionpack (6.1.3.2) lib/action_dispatch/http/content_security_policy.rb:18:in `call'
rack (2.2.3) lib/rack/session/abstract/id.rb:266:in `context'
rack (2.2.3) lib/rack/session/abstract/id.rb:260:in `call'
actionpack (6.1.3.2) lib/action_dispatch/middleware/cookies.rb:689:in `call'
activerecord (6.1.3.2) lib/active_record/migration.rb:601:in `call'
actionpack (6.1.3.2) lib/action_dispatch/middleware/callbacks.rb:27:in `block in call'
activesupport (6.1.3.2) lib/active_support/callbacks.rb:98:in `run_callbacks'
actionpack (6.1.3.2) lib/action_dispatch/middleware/callbacks.rb:26:in `call'
actionpack (6.1.3.2) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (6.1.3.2) lib/action_dispatch/middleware/actionable_exceptions.rb:18:in `call'
actionpack (6.1.3.2) lib/action_dispatch/middleware/debug_exceptions.rb:29:in `call'
web-console (4.1.0) lib/web_console/middleware.rb:132:in `call_app'
web-console (4.1.0) lib/web_console/middleware.rb:28:in `block in call'
web-console (4.1.0) lib/web_console/middleware.rb:17:in `catch'
web-console (4.1.0) lib/web_console/middleware.rb:17:in `call'
actionpack (6.1.3.2) lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
railties (6.1.3.2) lib/rails/rack/logger.rb:37:in `call_app'
railties (6.1.3.2) lib/rails/rack/logger.rb:26:in `block in call'
activesupport (6.1.3.2) lib/active_support/tagged_logging.rb:99:in `block in tagged'
activesupport (6.1.3.2) lib/active_support/tagged_logging.rb:37:in `tagged'
activesupport (6.1.3.2) lib/active_support/tagged_logging.rb:99:in `tagged'
railties (6.1.3.2) lib/rails/rack/logger.rb:26:in `call'
sprockets-rails (3.2.2) lib/sprockets/rails/quiet_assets.rb:13:in `call'
actionpack (6.1.3.2) lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
actionpack (6.1.3.2) lib/action_dispatch/middleware/request_id.rb:26:in `call'
rack (2.2.3) lib/rack/method_override.rb:24:in `call'
rack (2.2.3) lib/rack/runtime.rb:22:in `call'
activesupport (6.1.3.2) lib/active_support/cache/strategy/local_cache_middleware.rb:29:in `call'
actionpack (6.1.3.2) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (6.1.3.2) lib/action_dispatch/middleware/static.rb:24:in `call'
rack (2.2.3) lib/rack/sendfile.rb:110:in `call'
actionpack (6.1.3.2) lib/action_dispatch/middleware/host_authorization.rb:98:in `call'
rack-mini-profiler (2.3.0) lib/mini_profiler/profiler.rb:373:in `call'
webpacker (5.2.1) lib/webpacker/dev_server_proxy.rb:25:in `perform_request'
rack-proxy (0.6.5) lib/rack/proxy.rb:57:in `call'
railties (6.1.3.2) lib/rails/engine.rb:539:in `call'
puma (5.1.1) lib/puma/configuration.rb:246:in `call'
puma (5.1.1) lib/puma/request.rb:76:in `block in handle_request'
puma (5.1.1) lib/puma/thread_pool.rb:337:in `with_force_shutdown'
puma (5.1.1) lib/puma/request.rb:75:in `handle_request'
puma (5.1.1) lib/puma/server.rb:431:in `process_client'
puma (5.1.1) lib/puma/thread_pool.rb:145:in `block in spawn_thread'
Request

Parameters:

None

Toggle session dump
Toggle env dump
Response

Headers:

None
5

Jesli wpiszę statycznie kraj, tak poradziłeś, to działa bez problemu. Natomiast jeszcze mam problem z dostaniem listy dla wszystkich krajów, nawet jak wywołam country na zmiennej z form for, tak jak radziłeś.

6

Musisz dokładniej opisać co masz na myśli pisząc lista dla wszystkich krajów.

Metoda CS.states zwraca stany dla konkretnego kraju, żeby zwrócić dla każdego kraju wszystkie stany i dla każdego kraju wszystkie miasta musisz iterować w pętlach. Tylko nie za bardzo rozumiem sens takiej konstrukcji w formularzu.

Potrzeba osobny pól: państwo, stan, miasto i w zależności jakie państwo wybierzesz lista stanów powinna odświeżać się z nową listą stanów.

7

Sorki, faktycznie mocno nieprecyzjnie odpisałem. Miałem na myśli to, że jeśli zrobię tak jak napisałeś:

CS.states(@sth.country)

(wywołuję metodę country na zmiennej użytej w form_for), to wciąż dostaję ten sam błąd.Spodziewałem się, że jej wywołanie da mi listę wszystkich stanów/miast zawartych w gem-ie (stąd pisałem o “wszystkich”) i zostanie ona ograniczona dopiero przez kod JS - nie wiem, czy dobrze myślę?
Stąd też moje pytanie: czy metoda coutry jest wbudowana w gem, czy też trzeba ją jakoś osobno definiować? P.S.Oczywiście ogólny zarys formularza jest dokładnie taki, jak napisałeś.Przynam, że nie do końca rozumiem, jak ten gem działa “od środka”.

8

Country to nie metoda gema a twoja zmienna. Czy ty chcesz wyświetlać listę stanów dla pojedynczego kraju, cały czas tego samego? Czy w zależności jaki masz kraj zapisany gdzieś w bazie danych chcesz wyświetlać stany dynsmicznie. Musisz pokazać jakiś kod albo dokładniej opisać co chcesz osiągnąć, bo bez tego to tylko teoretyzujemy.