Ruby on rails 使用Ruby on Rails 3的命名空间中的关联错误

在“ROOT_RAILS/models/users/account.rb”中，我有

has_one :profile,
  :primary_key => "app_profile_id",
  :foreign_key => "id",
  :dependent => :destroy

belongs_to :user,
  :primary_key => "id",
  :foreign_key => "app_profile_id"

namespace "users" do
  resources :accounts
end

namespace "app" do
  resources :profiles
end

在“ROOT_RAILS/models/apps/profile.rb”中，我有

has_one :profile,
  :primary_key => "app_profile_id",
  :foreign_key => "id",
  :dependent => :destroy

belongs_to :user,
  :primary_key => "id",
  :foreign_key => "app_profile_id"

namespace "users" do
  resources :accounts
end

namespace "app" do
  resources :profiles
end

在“ROOT_RAILS/config/routes.rb”中，我有

has_one :profile,
  :primary_key => "app_profile_id",
  :foreign_key => "id",
  :dependent => :destroy

belongs_to :user,
  :primary_key => "id",
  :foreign_key => "app_profile_id"

namespace "users" do
  resources :accounts
end

namespace "app" do
  resources :profiles
end

当我尝试访问@account.profile（@account是一个account ActiveRecord）时，例如在“.html.erb”文件中，我遇到以下错误：

uninitialized constant Users::Account::Profile

---

问题出在哪里？

以下几点应该可以实现您的目标：

routes.rb：

resources :users do
  resource :profile
end

accounts.rb：

has_one :profile, :primary_key => "app_profile_id",
                  :dependent => :destroy

profile.rb：

belongs_to :user,
           :foreign_key => "app_profile_id"

---

确保profiles表中也包含一列外键。

在有点头痛之后，我找到了解决方案：

has_one :profile,
:class_name => "Apps::Profile",
:primary_key => "app_profile_id", 
:foreign_key => "id",
:dependent => :destroy

我尝试了“：foreign\u key=>”id“”而不是“：foreign\u key=>”app\u profile\u id”，以便确保profiles表中有外键。不管怎样，它不起作用。。。可能是因为“account.rb”和“profile.rb”分别位于“/models/users”和“models/apps”子文件夹中。这可能是问题所在吗？