Question

嗨，我需要你的cancan帮助。

我有这个控制器：

class RegistrationsController＆lt;设计:: RegistrationsController

我需要因为我必须覆盖一些方法。

我需要控制对此控制器的访问权限，因为管理员是唯一可以添加新用户的人。

如何使用load_and_authorize_resource？

我的能力.rb文件是： 班级能力 包括CanCan :: Ability

def initialize（user，controller_namespace） user || = Usuario.new

case controller_namespace
  when "Administrator"
    if user.rol == 1    
        can :manage, Faq
        can :manage, Tip
        can :manage, Administrator::HomeTratamientoController
   end
    if user.rol == 2
        can :manage, :admin_vacunas
        can :manage, Registration
    end
  when "paciente"
    if user.rol == 3
        can :manage, Paciente::HomeController
    end
  else  
        can :read, :all
 end

端

该模型是usuario.rb

当rol为1时，我没有问题，但是当时为2，我放了一行：

load_and_authorize_resource

在注册控制器中，我将操作新调用为管理员添加新用户，显示以下错误：

42ms完成500内部服务器错误（ActiveRecord：5.1ms）

NameError - 未初始化的常量注册： activesupport（4.2.1）lib / active_support / dependencies.rb：533：在load_missing_constant' activesupport (4.2.1) lib/active_support/dependencies.rb:184:in const_missing＆＃39; activesupport（4.2.1）lib / active_support / inflector / methods.rb:261:in block in constantize' activesupport (4.2.1) lib/active_support/inflector/methods.rb:259:in constantize＆＃39; activesupport（4.2.1）lib / active_support / core_ext / string / inflections.rb:66:in constantize' cancancan (2.0.0) lib/cancan/controller_resource.rb:156:in resource_class＆＃39; cancancan（2.0.0）lib / cancan / controller_resource.rb：192：在resource_base' cancancan (2.0.0) lib/cancan/controller_resource.rb:80:in build_resource＆＃39; cancancan（2.0.0）lib / cancan / controller_resource.rb：61：在load_resource_instance' cancancan (2.0.0) lib/cancan/controller_resource.rb:35:in load_resource＆＃39; cancancan（2.0.0）lib / cancan / controller_resource.rb：12：在make_lambda中的block in add_before_action' activesupport (4.2.1) lib/active_support/callbacks.rb:448:in块中＆＃39; activesupport（4.2.1）lib / active_support / callbacks.rb:164：block in halting' activesupport (4.2.1) lib/active_support/callbacks.rb:504:in阻止呼叫＆＃39; activesupport（4.2.1）lib / active_support / callbacks.rb:504：在call' activesupport (4.2.1) lib/active_support/callbacks.rb:92:in _ run_callbacks＆＃39; activesupport（4.2.1）lib / active_support / callbacks.rb：776：在_run_process_action_callbacks' activesupport (4.2.1) lib/active_support/callbacks.rb:81:in run_callbacks＆＃39; actionpack（4.2.1）lib / abstract_controller / callbacks.rb：19：在process_action' actionpack (4.2.1) lib/action_controller/metal/rescue.rb:29:in process_action＆＃39; actionpack（4.2.1）lib / action_controller / metal / instrumentation.rb：32：在block in process_action' activesupport (4.2.1) lib/active_support/notifications.rb:164:in块中的仪器＆＃39; activesupport（4.2.1）lib / active_support / notifications / instrumenter.rb:20:in instrument' activesupport (4.2.1) lib/active_support/notifications.rb:164:in instrument＆＃39; actionpack（4.2.1）lib / action_controller / metal / instrumentation.rb：30：在process_action' actionpack (4.2.1) lib/action_controller/metal/params_wrapper.rb:250:in process_action＆＃39; activerecord（4.2.1）lib / active_record / railties / controller_runtime.rb:18:in process_action' actionpack (4.2.1) lib/abstract_controller/base.rb:137:in进程＆＃39; actionview（4.2.1）lib / action_view / rendering.rb：30：在process' actionpack (4.2.1) lib/action_controller/metal.rb:196:in发送＆＃39; actionpack（4.2.1）lib / action_controller / metal / rack_delegation.rb：13：dispatch' actionpack (4.2.1) lib/action_controller/metal.rb:237:in阻止行动＆＃39; actionpack（4.2.1）lib / action_dispatch / routing / route_set.rb:74:in dispatch' actionpack (4.2.1) lib/action_dispatch/routing/route_set.rb:43:in serve＆＃39; actionpack（4.2.1）lib / action_dispatch / routing / mapper.rb：49：in serve' actionpack (4.2.1) lib/action_dispatch/journey/router.rb:43:in block in serve＆＃39; actionpack（4.2.1）lib / action_dispatch / journey / router.rb：30：在serve' actionpack (4.2.1) lib/action_dispatch/routing/route_set.rb:819:in来电＆＃39; newrelic_rpm（3.16.1.320）lib / new_relic / agent / instrumentation / middleware_tracing.rb:96:in call' newrelic_rpm (3.16.1.320) lib/new_relic/rack/agent_hooks.rb:30:in traced_call＆＃39; newrelic_rpm（3.16.1.320）lib / new_relic / agent / instrumentation / middleware_tracing.rb:96:in call' newrelic_rpm (3.16.1.320) lib/new_relic/rack/browser_monitoring.rb:32:in traced_call＆＃39; newrelic_rpm（3.16.1.320）lib / new_relic / agent / instrumentation / middleware_tracing.rb:96:in call' newrelic_rpm (3.16.1.320) lib/new_relic/rack/developer_mode.rb:48:in traced_call＆＃39; newrelic_rpm（3.16.1.320）lib / new_relic / agent / instrumentation / middleware_tracing.rb:96:in call' warden (1.2.6) lib/warden/manager.rb:35:in阻止通话＆＃39; warden（1.2.6）lib / warden / manager.rb:34:in call' newrelic_rpm (3.16.1.320) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in来电＆＃39; rack（1.6.4）lib / rack / etag.rb:24:in call' newrelic_rpm (3.16.1.320) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in来电＆＃39; rack（1.6.4）lib / rack / conditionalget.rb:25:in call' newrelic_rpm (3.16.1.320) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in call＆＃39; rack（1.6.4）lib / rack / head.rb:13:in call' newrelic_rpm (3.16.1.320) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in call＆＃39; actionpack（4.2.1）lib / action_dispatch / middleware / params_parser.rb:27:in call' newrelic_rpm (3.16.1.320) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in call＆＃39; actionpack（4.2.1）lib / action_dispatch / middleware / flash.rb：260：call' newrelic_rpm (3.16.1.320) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in来电＆＃39; rack（1.6.4）lib / rack / session / abstract / id.rb:225：在context' rack (1.6.4) lib/rack/session/abstract/id.rb:220:in电话＆＃39; newrelic_rpm（3.16.1.320）lib / new_relic / agent / instrumentation / middleware_tracing.rb:96:in call' actionpack (4.2.1) lib/action_dispatch/middleware/cookies.rb:560:in call＆＃39; newrelic_rpm（3.16.1.320）lib / new_relic / agent / instrumentation / middleware_tracing.rb:96:in call' activerecord (4.2.1) lib/active_record/query_cache.rb:36:in call＆＃39; newrelic_rpm（3.16.1.320）lib / new_relic / agent / instrumentation / middleware_tracing.rb:96:in call' activerecord (4.2.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:649:in call＆＃39; newrelic_rpm（3.16.1.320）lib / new_relic / agent / instrumentation / middleware_tracing.rb:96:in call' activerecord (4.2.1) lib/active_record/migration.rb:378:in call＆＃39; newrelic_rpm（3.16.1.320）lib / new_relic / agent / instrumentation / middleware_tracing.rb:96:in call' actionpack (4.2.1) lib/action_dispatch/middleware/callbacks.rb:29:in阻止通话＆＃39; activesupport（4.2.1）lib / active_support / callbacks.rb:88:in _run_callbacks' activesupport (4.2.1) lib/active_support/callbacks.rb:776:in _ run_call_callbacks＆＃39; activesupport（4.2.1）lib / active_support / callbacks.rb:81:in run_callbacks' actionpack (4.2.1) lib/action_dispatch/middleware/callbacks.rb:27:in call＆＃39; newrelic_rpm（3.16.1.320）lib / new_relic / agent / instrumentation / middleware_tracing.rb:96:in call' actionpack (4.2.1) lib/action_dispatch/middleware/reloader.rb:73:in call＆＃39; newrelic_rpm（3.16.1.320）lib / new_relic / agent / instrumentation / middleware_tracing.rb:96:in call' actionpack (4.2.1) lib/action_dispatch/middleware/remote_ip.rb:78:in call＆＃39; newrelic_rpm（3.16.1.320）lib / new_relic / agent / instrumentation / middleware_tracing.rb:96:in call' better_errors (2.1.1) lib/better_errors/middleware.rb:84:in protected_app_call＆＃39; better_errors（2.1.1）lib / better_errors / middleware.rb:79:in better_errors_call' better_errors (2.1.1) lib/better_errors/middleware.rb:57:in call＆＃39; newrelic_rpm（3.16.1.320）lib / new_relic / agent / instrumentation / middleware_tracing.rb:96:in call' actionpack (4.2.1) lib/action_dispatch/middleware/debug_exceptions.rb:17:in call＆＃39; newrelic_rpm（3.16.1.320）lib / new_relic / agent / instrumentation / middleware_tracing.rb:96:in call' web-console (2.3.0) lib/web_console/middleware.rb:28:in阻止通话＆＃39; web-console（2.3.0）lib / web_console / middleware.rb:18:in call' newrelic_rpm (3.16.1.320) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in call＆＃39; actionpack（4.2.1）lib / action_dispatch / middleware / show_exceptions.rb:30:in call' newrelic_rpm (3.16.1.320) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in call＆＃39; railties（4.2.1）lib / rails / rack / logger.rb:38:in call_app' railties (4.2.1) lib/rails/rack/logger.rb:20:in阻止电话＆＃39; activesupport（4.2.1）lib / active_support / tagged_logging.rb:68:in block in tagged' activesupport (4.2.1) lib/active_support/tagged_logging.rb:26:in已标记＆＃39; activesupport（4.2.1）lib / active_support / tagged_logging.rb:68:in tagged' railties (4.2.1) lib/rails/rack/logger.rb:20:in call＆＃39; quiet_assets（1.1.0）lib / quiet_assets.rb:27:in call_with_quiet_assets' newrelic_rpm (3.16.1.320) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in来电＆＃39; actionpack（4.2.1）lib / action_dispatch / middleware / request_id.rb:21:in call' newrelic_rpm (3.16.1.320) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in call＆＃39; rack（1.6.4）lib / rack / methodoverride.rb:22:in call' newrelic_rpm (3.16.1.320) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in call＆＃39; rack（1.6.4）lib / rack / runtime.rb:18:in call' newrelic_rpm (3.16.1.320) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in call＆＃39; activesupport（4.2.1）lib / active_support / cache / strategy / local_cache_middleware.rb:28:in call' newrelic_rpm (3.16.1.320) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in call＆＃39; rack（1.6.4）lib / rack / lock.rb:17:in call' newrelic_rpm (3.16.1.320) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in call＆＃39; actionpack（4.2.1）lib / action_dispatch / middleware / static.rb：113：在call' newrelic_rpm (3.16.1.320) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in call＆＃39; rack（1.6.4）lib / rack / sendfile.rb:113：在call' newrelic_rpm (3.16.1.320) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in来电＆＃39; railties（4.2.1）lib / rails / engine.rb：518：call' railties (4.2.1) lib/rails/application.rb:164:in来电＆＃39; newrelic_rpm（3.16.1.320）lib / new_relic / agent / instrumentation / middleware_tracing.rb:96:in call' rack (1.6.4) lib/rack/content_length.rb:15:in call＆＃39; thin（1.7.0）lib / thin / connection.rb:86:in block in pre_process' thin (1.7.0) lib/thin/connection.rb:84:in pre_process＆＃39; thin（1.7.0）lib / thin / connection.rb:53:in process' thin (1.7.0) lib/thin/connection.rb:39:in receive_data＆＃39; eventmachine（1.2.0.1）lib / eventmachine.rb：194：在run' thin (1.7.0) lib/thin/backends/base.rb:73:in开始＆＃39; thin（1.7.0）lib / thin / server.rb:162:in start' rack (1.6.4) lib/rack/handler/thin.rb:19:in run＆＃39; rack（1.6.4）lib / rack / server.rb:286:in start' railties (4.2.1) lib/rails/commands/server.rb:80:in start＆＃39; railties（4.2.1）lib / rails / commands / commands_tasks.rb:80:in block in server' railties (4.2.1) lib/rails/commands/commands_tasks.rb:75:in server＆＃39; railties（4.2.1）lib / rails / commands / commands_tasks.rb:39:in run_command!' railties (4.2.1) lib/rails/commands.rb:17:in＆＃39; bin / rails：9：<top (required)>' spring (1.7.2) lib/spring/client/rails.rb:28:in来电＆＃39; spring（1.7.2）lib / spring / client / command.rb:7:in call' spring (1.7.2) lib/spring/client.rb:30:in run＆＃39; 弹簧（1.7.2）箱/弹簧：49：在<top (required)>' spring (1.7.2) lib/spring/binstub.rb:11:in＆＃39; bin / spring：13：<top (required)>' bin/rails:3:in＆＃39;

有些人可以帮助我吗？

Answer 1

您撰写了can :manage, Registration，因此您需要Registration模型。

在您的情况下，您应该将其替换为：

can :create, User

并在控制器中load_and_authorize_resource :user, parent: false

https://github.com/CanCanCommunity/cancancan/wiki/authorizing-controller-actions

免费提示：

不要用西班牙语写出模型名称，而是用英语写总是。因此，请将Usuario替换为User。

Rails Cancan NameError - 未初始化的constan

1 个答案: