Rails Engine - NameError：初期化されていない定数

私はクラスパッションと懸念を持っているRails Engine Classificationを作成しています。Rails Engine - NameError：初期化されていない定数

私はまた、Passionable Concernを含む別のエンジンポストを持っています。この情熱的な心配は/ libフォルダのEngine Classificationに属します。

NameError (uninitialized constant Feed::Post::Categorization):

"Categorization" is the jointable that I created in Engine Classification.

コードの一部を以下にダウン掲示される：

は私がpassion_idsを渡して、新しいポストを実行しようとするたびに、私はこのエラーメッセージを取得する、ということが判明します。

エンジンの分類 ＃passion.rb

module Classification 
    class Passion < ApplicationRecord 
    ... 
    has_many :categorizations 
    has_many :posts, as: :categorizable, through: :categorizations 
    ... 
    end 
end 

#==========================================// 
# Classification.rb (JoinTable) 
module Classification 
    class Categorization < ApplicationRecord 
    belongs_to :passion 
    belongs_to :categorizable, polymorphic: true 
    end 
end 


#===========================================// 
# classification/lib/passionable.rb 

require 'active_support/concern' 

module Classification 
    module Passionable extend ActiveSupport::Concern 
    included do 
     has_many :categorizations, as: :categorizable 
     has_many :passions, through: :categorizations 
    end 
    end 
end

エンジンポスト

module Feed 
    class Post < ApplicationRecord 
    has_many :pictures, class_name: "Feed::Picture" 

    include ::Classification::Passionable 
    ... 
    end 
end

JSONのポストを作成します。あなたのモデルとの懸念が異なる名前空間の下にあるので

# classification/lib/passionable.rb 

require 'active_support/concern' 

module Classification 
    module Passionable extend ActiveSupport::Concern 
    included do 
     has_many :categorizations, as: :categorizable, class_name: 'Classification::Categorization' 
     has_many :passions, through: :categorizations 
    end 
    end 
end

：

{ 
    "post": { 
     "title": "My post title", 
     "content": "Lorem ipsum dolor sit amet..", 
     "passion_ids":["8bf8559a-857d-4ca5-82e1-f93dd3effc35","d51747b7-0960-460a-b15a-4b593155e2c5"] 
    } 
}

ERROR MESSAGE：

NameError (uninitialized constant Feed::Post::Categorization): 

activerecord (5.0.2) lib/active_record/inheritance.rb:152:in `compute_type' 
activerecord (5.0.2) lib/active_record/reflection.rb:354:in `compute_class' 
activerecord (5.0.2) lib/active_record/reflection.rb:350:in `klass' 
activerecord (5.0.2) lib/active_record/reflection.rb:745:in `source_reflection' 
activerecord (5.0.2) lib/active_record/reflection.rb:925:in `check_validity!' 
activerecord (5.0.2) lib/active_record/associations/association.rb:25:in `initialize' 
activerecord (5.0.2) lib/active_record/associations/has_many_through_association.rb:8:in `initialize' 
activerecord (5.0.2) lib/active_record/associations.rb:240:in `new' 
activerecord (5.0.2) lib/active_record/associations.rb:240:in `association' 
activerecord (5.0.2) lib/active_record/associations/builder/collection_association.rb:66:in `passion_ids=' 
activemodel (5.0.2) lib/active_model/attribute_assignment.rb:46:in `public_send' 
activemodel (5.0.2) lib/active_model/attribute_assignment.rb:46:in `_assign_attribute' 
activemodel (5.0.2) lib/active_model/attribute_assignment.rb:40:in `block in _assign_attributes' 
activemodel (5.0.2) lib/active_model/attribute_assignment.rb:39:in `each' 
activemodel (5.0.2) lib/active_model/attribute_assignment.rb:39:in `_assign_attributes' 
activerecord (5.0.2) lib/active_record/attribute_assignment.rb:26:in `_assign_attributes' 
activemodel (5.0.2) lib/active_model/attribute_assignment.rb:33:in `assign_attributes' 
activerecord (5.0.2) lib/active_record/core.rb:319:in `initialize' 
activerecord (5.0.2) lib/active_record/inheritance.rb:65:in `new' 
activerecord (5.0.2) lib/active_record/inheritance.rb:65:in `new' 
engines/feed/app/controllers/feed/posts_controller.rb:21:in `create' 
actionpack (5.0.2) lib/action_controller/metal/basic_implicit_render.rb:4:in `send_action' 
actionpack (5.0.2) lib/abstract_controller/base.rb:188:in `process_action' 
actionpack (5.0.2) lib/action_controller/metal/rendering.rb:30:in `process_action' 
actionpack (5.0.2) lib/abstract_controller/callbacks.rb:20:in `block in process_action' 
activesupport (5.0.2) lib/active_support/callbacks.rb:126:in `call' 
activesupport (5.0.2) lib/active_support/callbacks.rb:506:in `block (2 levels) in compile' 
activesupport (5.0.2) lib/active_support/callbacks.rb:455:in `call' 
activesupport (5.0.2) lib/active_support/callbacks.rb:101:in `__run_callbacks__' 
activesupport (5.0.2) lib/active_support/callbacks.rb:750:in `_run_process_action_callbacks' 
activesupport (5.0.2) lib/active_support/callbacks.rb:90:in `run_callbacks' 
actionpack (5.0.2) lib/abstract_controller/callbacks.rb:19:in `process_action' 
actionpack (5.0.2) lib/action_controller/metal/rescue.rb:20:in `process_action' 
actionpack (5.0.2) lib/action_controller/metal/instrumentation.rb:32:in `block in process_action' 
activesupport (5.0.2) lib/active_support/notifications.rb:164:in `block in instrument' 
activesupport (5.0.2) lib/active_support/notifications/instrumenter.rb:21:in `instrument' 
activesupport (5.0.2) lib/active_support/notifications.rb:164:in `instrument' 
actionpack (5.0.2) lib/action_controller/metal/instrumentation.rb:30:in `process_action' 
actionpack (5.0.2) lib/action_controller/metal/params_wrapper.rb:248:in `process_action' 
activerecord (5.0.2) lib/active_record/railties/controller_runtime.rb:18:in `process_action' 
actionpack (5.0.2) lib/abstract_controller/base.rb:126:in `process' 
actionpack (5.0.2) lib/action_controller/metal.rb:190:in `dispatch' 
actionpack (5.0.2) lib/action_controller/metal.rb:262:in `dispatch' 
actionpack (5.0.2) lib/action_dispatch/routing/route_set.rb:50:in `dispatch' 
actionpack (5.0.2) lib/action_dispatch/routing/route_set.rb:32:in `serve' 
actionpack (5.0.2) lib/action_dispatch/journey/router.rb:39:in `block in serve' 
actionpack (5.0.2) lib/action_dispatch/journey/router.rb:26:in `each' 
actionpack (5.0.2) lib/action_dispatch/journey/router.rb:26:in `serve' 
actionpack (5.0.2) lib/action_dispatch/routing/route_set.rb:725:in `call' 
railties (5.0.2) lib/rails/engine.rb:522:in `call' 
railties (5.0.2) lib/rails/railtie.rb:193:in `public_send' 
railties (5.0.2) lib/rails/railtie.rb:193:in `method_missing' 
actionpack (5.0.2) lib/action_dispatch/routing/mapper.rb:17:in `block in <class:Constraints>' 
actionpack (5.0.2) lib/action_dispatch/routing/mapper.rb:46:in `serve' 
actionpack (5.0.2) lib/action_dispatch/journey/router.rb:39:in `block in serve' 
actionpack (5.0.2) lib/action_dispatch/journey/router.rb:26:in `each' 
actionpack (5.0.2) lib/action_dispatch/journey/router.rb:26:in `serve' 
actionpack (5.0.2) lib/action_dispatch/routing/route_set.rb:725:in `call' 
rack (2.0.1) lib/rack/etag.rb:25:in `call' 
rack (2.0.1) lib/rack/conditional_get.rb:38:in `call' 
rack (2.0.1) lib/rack/head.rb:12:in `call' 
activerecord (5.0.2) lib/active_record/migration.rb:553:in `call' 
actionpack (5.0.2) lib/action_dispatch/middleware/callbacks.rb:38:in `block in call' 
activesupport (5.0.2) lib/active_support/callbacks.rb:97:in `__run_callbacks__' 
activesupport (5.0.2) lib/active_support/callbacks.rb:750:in `_run_call_callbacks' 
activesupport (5.0.2) lib/active_support/callbacks.rb:90:in `run_callbacks' 
actionpack (5.0.2) lib/action_dispatch/middleware/callbacks.rb:36:in `call' 
actionpack (5.0.2) lib/action_dispatch/middleware/executor.rb:12:in `call' 
actionpack (5.0.2) lib/action_dispatch/middleware/remote_ip.rb:79:in `call' 
actionpack (5.0.2) lib/action_dispatch/middleware/debug_exceptions.rb:49:in `call' 
actionpack (5.0.2) lib/action_dispatch/middleware/show_exceptions.rb:31:in `call' 
railties (5.0.2) lib/rails/rack/logger.rb:36:in `call_app' 
railties (5.0.2) lib/rails/rack/logger.rb:24:in `block in call' 
activesupport (5.0.2) lib/active_support/tagged_logging.rb:69:in `block in tagged' 
activesupport (5.0.2) lib/active_support/tagged_logging.rb:26:in `tagged' 
activesupport (5.0.2) lib/active_support/tagged_logging.rb:69:in `tagged' 
railties (5.0.2) lib/rails/rack/logger.rb:24:in `call' 
actionpack (5.0.2) lib/action_dispatch/middleware/request_id.rb:24:in `call' 
rack (2.0.1) lib/rack/runtime.rb:22:in `call' 
activesupport (5.0.2) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call' 
actionpack (5.0.2) lib/action_dispatch/middleware/executor.rb:12:in `call' 
actionpack (5.0.2) lib/action_dispatch/middleware/static.rb:136:in `call' 
rack (2.0.1) lib/rack/sendfile.rb:111:in `call' 
railties (5.0.2) lib/rails/engine.rb:522:in `call' 
puma (3.8.2) lib/puma/configuration.rb:224:in `call' 
puma (3.8.2) lib/puma/server.rb:600:in `handle_request' 
puma (3.8.2) lib/puma/server.rb:435:in `process_client' 
puma (3.8.2) lib/puma/server.rb:299:in `block in run' 
puma (3.8.2) lib/puma/thread_pool.rb:120:in `block in spawn_thread'

出典

2017-04-17 Maurício Júnior