無法與ID找到用戶=＃<的ActiveRecord ::關係:: ActiveRecord_Relation_User：0x2eb9b58>

Question

我得到這個錯誤，當我點擊 '編輯'：

Couldn't find User with id=#<ActiveRecord::Relation::ActiveRecord_Relation_User:0x2eb9b58> 

ActiveRecord::RecordNotFound in UsersController#edit 

這裏是UsersController：

class UsersController < ApplicationController 
    before_action :set_user, only: [:index, :show, :edit, :create, :update, :destroy] 
    ... 
    def edit 
    @user = User.find(params[:id]) #the error points to this line. 
    end 
    ... 
end 

FULL TRACE如下：

了activerecord（4.0.0） LIB/active_record /關係/ finder_methods .RB：198：在 raise_record_not_found_exception!' activerecord (4.0.0) lib/active_record/relation/finder_methods.rb:284:in find_one ' 了activerecord（4.0.0） LIB/active_record /關係/ finder_methods.rb：268：在find_with_ids' activerecord (4.0.0) lib/active_record/relation/finder_methods.rb:35:in查找' 了activerecord-deprecated_finders（1.0.3） LIB/active_record/deprecated_finders/relation.rb：122：在find' C:in 找到'app/controllers/users_controller.rb：18：在edit' actionpack (4.0.0) lib/action_controller/metal/implicit_render.rb:4:in send_action'actionpack（4.0.0） lib/abstract_controller/base.rb：189：在process_action' actionpack (4.0.0) lib/action_controller/metal/rendering.rb:10:in process_action'actionpack（4.0.0 ） lib/abstract_controller/callbacks.rb：18：在block in process_action' activesupport (4.0.0) lib/active_support/callbacks.rb:413:in 運行 _759441773__process_action__callbacks'activesupport（4.0.0） lib/active_support/callbacks.rb：80：in run_callbacks' actionpack (4.0.0) lib/abstract_controller/callbacks.rb:17:in process_action ' ActionPack的（4.0.0）LIB/action_controller /金屬/ rescue.rb：29：在 process_action' actionpack (4.0.0) lib/action_controller/metal/instrumentation.rb:31:in塊在 process_action' 的ActiveSupport（4.0.0） LIB/active_support/notifications.rb：159：在block in instrument' activesupport (4.0.0) lib/active_support/notifications/instrumenter.rb:20:in儀器' 的ActiveSupport（4.0.0）LIB/active_support/notifications.rb：159：在 instrument' actionpack (4.0.0) lib/action_controller/metal/instrumentation.rb:30:in process_action' ActionPack的（4.0.0） LIB/action_controller /金屬/ params_wrapper.rb：245：在process_action' activerecord (4.0.0) lib/active_record/railties/controller_runtime.rb:18:in process_action」 ActionPack的（4.0 0.0） LIB/abstract_controller/base.rb：136：在process' actionpack (4.0.0) lib/abstract_controller/rendering.rb:44:in過程ActionPack的 （4.0.0）LIB/action_controller/metal.rb：195：在​​調度」動作（4.0.0）lib/action_controller/metal.rb：231： block in action' actionpack (4.0.0) lib/action_dispatch/routing/route_set.rb:80:in調用'actionpack（4.0.0）lib/action_dispatch/routing/route_set.rb：80：在dispatch' actionpack (4.0.0) lib/action_dispatch/routing/route_set.rb:48:in 調用'actionpack（4.0.0） lib/action_dispatch/journey/router.rb：71：在 block in call' actionpack (4.0.0) lib/action_dispatch/journey/router.rb:59:in每個'actionpack（4.0.0） lib/action_dispatch/journey/router.rb：59：在call' actionpack (4.0.0) lib/action_dispatch/routing/route_set.rb:655:in中調用'rack（1.5.2） lib/rack /etag.rb:23:in call' rack (1.5.2) lib/rack/conditionalget.rb:25:in調用'rack（1.5.2） lib/rack/head.rb：11：在call' actionpack (4.0.0) lib/action_dispatch/middleware/params_parser.rb:27:in調用' actionpack（4.0.0）lib/action_dispatch/middleware/flash.rb：241 ： call' rack (1.5.2) lib/rack/session/abstract/id.rb:225:in上下文' rack（1.5.2）lib/rack/session/abstract/id.rb：220：在call' actionpack (4.0.0) lib/action_dispatch/middleware/cookies.rb:486:in調用' activerecord（4.0.0）lib/active_record/query_cache.rb：36：在call' activerecord (4.0.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:626:in 中調用'activerecord（4.0.0）lib/active_record/migration.rb：369： call' actionpack (4.0.0) lib/action_dispatch/middleware/callbacks.rb:29:in調用中的塊' activesupport 4.0.0）lib/active_support/callbacks.rb：373：in _run__847569706__call__callbacks' activesupport (4.0.0) lib/active_support/callbacks.rb:80:in run_callbacks'actionpack （4.0.0）lib/action_dispatch/middleware/callbacks.rb：27：在call' actionpack (4.0.0) lib/action_dispatch/middleware/reloader.rb:64:in 調用'actionpack（4.0.0） lib /action_dispatch/middleware/remote_ip.rb:76:in call' actionpack (4.0.0) lib/action_dispatch/middleware/debug_exceptions.rb:17:in call'actionpack（4.0.0） lib/action_dispatch/middleware/show_exceptions.rb：30：in call' railties (4.0.0) lib/rails/rack/logger.rb:38:in call_app'railties （4.0.0）lib/rails/rack /記錄器。rb：21：在block in call' activesupport (4.0.0) lib/active_support/tagged_logging.rb:67:in中標記爲' activesupport（4.0.0）lib/active_support/tagged_logging.rb：25： tagged' activesupport (4.0.0) lib/active_support/tagged_logging.rb:67:in標記'railties（4.0.0） lib/rails/rack/logger.rb：21 ：在call' actionpack (4.0.0) lib/action_dispatch/middleware/request_id.rb:21:in調用'rack（1.5.2） lib/rack/methodoverride.rb：21：在call' rack (1.5.2) lib/rack/runtime.rb:17:in調用'activesupport（4.0.0） lib/active_support/cache/strategy/local_cache.rb：83：在call' rack (1.5.2) lib/rack/lock.rb:17:in調用'actionpack（4.0.0） lib/action_dispatch/middleware/static.rb：64：在call' railties (4.0.0) lib/rails/engine.rb:511:in調用'railties（4.0.0） lib/rails/application.rb：97：在call' rack (1.5.2) lib/rack/lock.rb:17:in調用'rack（1.5.2） ） lib/rack/content_length.rb：14：在call' rack (1.5.2) lib/rack/handler/webrick.rb:60:in服務' C：/ RailsInstaller/Ruby1。 9.3/lib/ruby​​/1.9.1/webrick/httpserver.rb：138：在 service' C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/webrick/httpserver.rb:94:in 運行' C：/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/webrick/server.rb：191：in `start_thread中的塊'

Answer 1

查看編輯命令的視圖文件，所以edit.html.erb。您可能試圖在聯接模型上調用某些內容，而不是嘗試顯示的實際對象。