Rails has_and_belongs_to_many with Many

Question

我正在开发一个具有复杂关联的 Rails 4 应用程序，但我不知道如何将一个模型加入到父模型中。

基本上我的应用逻辑如下

User
  - belongs_to :account, polymorphic: true

Developer
  - has_one :user, as: :account
  - has_and_belongs_to_many :organizations

Organization
  - has_one :user, as: :account
  - has_and_belongs_to_many :developers

• 我决定通过 STI 走这条路线，因为这让我可以让我的应用迁移文件更整洁、更有条理

所以可以有一个 Developer 本身，也可以有一个 Organization 包含许多 Developers，所以我添加了 has_and_belongs_to_many :organizations 和 has_and_belongs_to_many :developers 来创建这种关系。因此，如果我查找 User.find().account.developers 或 User.find().account.organizations，我的应用程序中的所有内容都可以正常工作，我会得到相关记录。

---

现在我们到了我遇到问题的部分。在我的 Rails 应用程序中，我有一个名为 App 的模型。 Developer 可以自己创建多个Apps，或者Developer 可以创建和Organization 并在该Organization 内创建多个Apps，属于该Organization 的所有Developers 都可以访问也。我不知道如何实现这样的关系。有什么建议吗？

---

Developer
  has_one :user, as: :account
  has_many :apps, as: :appable
  has_and_belongs_to_many :founding_organizations, class_name: 'Organization', foreign_key: :founder_id
  has_and_belongs_to_many :collaborating_organizations, class_name: 'Organization', foreign_key: :collaborator_id

  has_and_belongs_to_many :organizations   (Should this stay?)

Organization
       has_one :user, as: :account
  has_many :apps, as: :appable
  has_and_belongs_to_many :founders, class_name: 'Developer', association_foreign_key: :founder_id
  has_and_belongs_to_many :collaborators, class_name: 'Developer', association_foreign_key: :collaborator_id

  has_and_belongs_to_many :developers   (Should this stay?)

App
  belongs_to :appable, polymorphic: true

Answer 1

/app/models/app.rb

App < ActiveRecord::Base
  belongs_to :appable, :polymorphic => true
end

/app/models/organization.rb

Organization < ActiveRecord::Base
  has_and_belongs_to_many :founders, :class_name => 'Developer', :association_foreign_key => :founder_id, :join_table => 'founders_organizations'
  has_and_belongs_to_many :collaborators, :class_name => 'Developer', :association_foreign_key => :collaborator_id, :join_table => 'collaborators_organizations'
  has_many :apps, :as => :appable
  # Other relationships
 end

/app/models/developer.rb

Developer < ActiveRecord::Base
  has_and_belongs_to_many :founded_organizations, :class_name => 'Organization', :foreign_key => :founder_id, :join_table => 'founders_organizations'
  has_and_belongs_to_many :collaborated_organizations, :class_name => 'Organization', :foreign_key => :collaborator_id, :join_table => 'collaborators_organizations'
  has_many :apps, :as => :appable
  # Other relationships
 end

Answer 2

如果您想要一个 HABTM 关联。你需要一个连接表。在 Rails 4 中，您可以添加一个包含以下内容的迁移文件：

create_join_table :developers, :organizations

然后只需使用：

Developer.find().organizations

或

Organization.find().developers

如果您使用User.find().account。你必须先得到账号的类，然后决定使用developers或organizations