使用从其他(mongoid / rails)inheritance的名称空间和引用模型的正确方法是什么?
我有从Scenario
inheritance的模型HandlingScenario
。 像这样:
## models/scenario.rb class Scenario include Mongoid::Document end ## models/scenarios/handling_scenario.rb class Scenarios::HandlingScenario :handling_scenarios # In the `User` model, the reference is `has_many :handling_scenarios` end
但是当我尝试访问HandlingScenario
类时,我遇到了麻烦:
➜ rails c Loading development environment (Rails 3.2.12) 2.0.0-p247 :001 > User.first.handling_scenarios LoadError: Expected /Users/christoffer/Projects/my_project/app/models/scenarios/handling_scenario.rb to define HandlingScenario
此外,当我尝试通过浏览器访问时,我收到此错误:
Started GET "/scenarios/handling_scenarios" for 127.0.0.1 at 2013-10-06 19:41:29 +0200 Processing by Scenarios::HandlingScenariosController#index as HTML MOPED: 127.0.0.1:27017 QUERY database=my_project_development collection=users selector={"$query"=>{"_id"=>"518f599683c336fb87000003"}, "$orderby"=>{:_id=>1}} flags=[:slave_ok] limit=-1 skip=0 batch_size=nil fields=nil (0.3998ms) Completed 500 Internal Server Error in 7ms NameError - uninitialized constant HandlingScenario:
控制器动作是:
## controllers/scenarios/handling_scenarios_controller.rb class Scenarios::HandlingScenariosController < ScenariosController def index @handling_scenarios = current_user.handling_scenarios end end
我的路线是:
## config/routes.rb namespace :scenarios do resources :handling_scenarios do member do ... end end end
对关系’has_many:handling_scenarios’使用class_name选项,以便rails知道模型handling_scenario位于文件scenario / handling_scenario.rb中:
## models/user.rb class User include Mongoid::Document has_many :handling_scenarios, class_name: "Scenarios::HandlingScenario" end
请参阅: http : //mongoid.org/en/mongoid/docs/relations.html
此外,您不需要在Scenarios :: HandlingScenario中包含Mongoid :: Document,因为它是从Scenarioinheritance的。
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