Rails 4 - Heroku日誌 - 如何使錯誤消息有意義

Question

我試圖推動一些代碼到heroku。

我從heroku日誌中收到此錯誤消息。我無法理解它。

，只要我能破譯，它的東西與我的用戶和角色模型，它們分別是：

用戶

rolify 
    attr_accessor :current_role 


has_and_belongs_to_many :roles, join_table: "users_roles" 

角色

class Role < ActiveRecord::Base 



    has_and_belongs_to_many :users, join_table: "users_roles" 
    belongs_to :resource, :polymorphic => true 

    validates :resource_type, 
      :inclusion => { :in => Rolify.resource_types }, 
      :allow_nil => true 

    scopify 



end 

User_Roles連接表：

create_table "users_roles", id: false, force: :cascade do |t| 
    t.integer "user_id" 
    t.integer "role_id" 
    end 

    add_index "users_roles", ["user_id", "role_id"], name: "index_users_roles_on_user_id_and_role_id", using: :btree 

任何人都可以理解這個錯誤消息的含義嗎？

/app/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.4/lib/active_record/associations.rb:1694: warning: already initialized constant User::HABTM_Roles 
2016-04-22T03:11:57.250562+00:00 app[web.1]: /app/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.4/lib/active_record/associations.rb:1694: warning: previous definition of HABTM_Roles was here 
2016-04-22T03:11:58.690994+00:00 app[web.1]: [3] ! Unable to load application: ArgumentError: Unknown key: :polymorphic. Valid keys are: :class_name, :anonymous_class, :foreign_key, :validate, :autosave, :table_name, :before_add, :after_add, :before_remove, :after_remove, :extend, :primary_key, :dependent, :as, :through, :source, :source_type, :inverse_of, :counter_cache, :join_table, :foreign_type 
2016-04-22T03:11:58.691033+00:00 app[web.1]: /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.4/lib/active_support/core_ext/hash/keys.rb:75:in `block in assert_valid_keys': Unknown key: :polymorphic. Valid keys are: :class_name, :anonymous_class, :foreign_key, :validate, :autosave, :table_name, :before_add, :after_add, :before_remove, :after_remove, :extend, :primary_key, :dependent, :as, :through, :source, :source_type, :inverse_of, :counter_cache, :join_table, :foreign_type (ArgumentError) 

我剛剛發現的資源下面介紹如何「rolify」結合用戶模型HABTM關係，所以它並不需要被作爲一個協會單獨列出，但我仍然得到這個錯誤：

Preloading application 
2016-04-22T04:09:58.023038+00:00 app[web.1]: [3] ! Unable to load application: ArgumentError: Unknown key: :polymorphic. Valid keys are: :class_name, :anonymous_class, :foreign_key, :validate, :autosave, :table_name, :before_add, :after_add, :before_remove, :after_remove, :extend, :primary_key, :dependent, :as, :through, :source, :source_type, :inverse_of, :counter_cache, :join_table, :foreign_type 
2016-04-22T04:09:58.023056+00:00 app[web.1]: /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.4/lib/active_support/core_ext/hash/keys.rb:75:in `block in assert_valid_keys': Unknown key: :polymorphic. Valid keys are: :class_name, :anonymous_class, :foreign_key, :validate, :autosave, :table_name, :before_add, :after_add, :before_remove, :after_remove, :extend, :primary_key, :dependent, :as, :through, :source, :source_type, :inverse_of, :counter_cache, :join_table, :foreign_type (ArgumentError) 

Answer 1

部分答案 我剛剛發現這一點：https://github.com/RolifyCommunity/rolify/issues/315

如果在用戶模式「rolify」，你不需要寫HABTM角色

Answer 2

此：

Unknown key: :polymorphic. Valid keys are: :class_name, :anonymous_class, :foreign_key, :validate, :autosave, :table_name, :before_add, :after_add, :before_remove, :after_remove, :extend, :primary_key, :dependent, :as, :through, :source, :source_type, :inverse_of, :counter_cache, :join_table, :foreign_type 

讓我覺得這是這一行：

belongs_to :resource, :polymorphic => true 

，因爲這是唯一的多態的關鍵我看。但我可能是錯的。