Railsコンソールエラー... NameError：初期化されていない定数

Question

私のモデルをレールでテストしています。私はRails 3.2、Ruby 1.9.3p0（2011-10-30リビジョン33570）です。[x86_64-darwin11.2.0] "User.first"と入力すると、最初のユーザーが返されます。私が "Gear.first"とタイプするとうまくいきます。

class User < ActiveRecord::Base 

    attr_accessible :first_name, :last_name, :email, :password, :password_confirmation 
    has_secure_password 
    has_many :gears, through: :user_gears 
    has_many :user_gears 
    before_save :create_remember_token 

    email_regex = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i 

    validates :first_name, presence: true, 
          length: {:maximum => 50 } 
    validates :last_name, presence: true, 
         length: {:maximum => 50 } 
    validates :email,  presence: true, 
         format: {:with => email_regex}, 
         uniqueness: {:case_sensitive => false} 
    validates :password, presence: true, 
         confirmation: true, 
         length: {within: 6..40} 

    def name 
    first_name + " " + last_name 
    end 

    private 

    def create_remember_token 
     self.remember_token = SecureRandom.urlsafe_base64 
    end 

end 

：ここ

NameError: uninitialized constant User::UserGear from /Users/dave/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.0/lib/active_record/inheritance.rb:119:in `compute_type' from /Users/dave/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.0/lib/active_record/reflection.rb:172:in `klass' from /Users/dave/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.0/lib/active_record/reflection.rb:385:in `block in source_reflection' from /Users/dave/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.0/lib/active_record/reflection.rb:385:in `collect' from /Users/dave/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.0/lib/active_record/reflection.rb:385:in `source_reflection' from /Users/dave/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.0/lib/active_record/reflection.rb:508:in `check_validity!' from /Users/dave/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.0/lib/active_record/associations/association.rb:26:in `initialize' from /Users/dave/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.0/lib/active_record/associations/collection_association.rb:24:in `initialize' from /Users/dave/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.0/lib/active_record/associations/has_many_through_association.rb:10:in `initialize' from /Users/dave/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.0/lib/active_record/associations.rb:157:in `new' from /Users/dave/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.0/lib/active_record/associations.rb:157:in `association' from /Users/dave/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.0/lib/active_record/associations/builder/association.rb:44:in `block in define_readers' from (irb):2 from /Users/dave/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.0/lib/rails/commands/console.rb:47:in `start' from /Users/dave/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.0/lib/rails/commands/console.rb:8:in `start' from /Users/dave/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.0/lib/rails/commands.rb:41:in `<top (required)>' from script/rails:6:in `require' from script/rails:6:in `<main>'1.9.3p0 :003 > exit 

は私のモデル ユーザークラスです：私は「User.first.gears」のようなユーザによってギアにアクセスしようとすると、しかし、私は次のエラーを得続けます歯車クラス

class Gear < ActiveRecord::Base 
    attr_accessible :title, :size, :price, :image_url, :sub_category_id 
    has_many :users, through: :user_gears 
    has_many :user_gears 
    belongs_to :sub_category 

    validates :title, presence: true 
    validates :size, presence: true 
    validates :price, presence: true 
    validates :sub_category_id, presence: true 
end 

User_Gearsクラス

class UserGears < ActiveRecord::Base 
    belongs_to :gear 
    belongs_to :user 
end 

何が欠けていますか？

Answer 1

あなたはUserGearにごUserGearsクラスの名前を変更し、user_gear.rb