Rails 4多连接，部分自引用has_many通过

Question

我知道那里有很多类似的问题，但是我无法找到符合我特殊情况的任何问题，坦率地说，我的大脑正在把自己捆绑成试图围绕这种情况的结。因此，非常感谢任何外部见解！

我有Users和Portfolios。 Portfolios有一个creator，User。 这很好。

但Portfolios之间也可以共享Users。我使用has_many_through自引用关系对此进行建模。 这是我遇到麻烦的地方。

这就是我所拥有的，但它不起作用。想法吗

我的分享模式： /app/models/share.rb

class Share < ActiveRecord::Base
  belongs_to :shared_by, class_name: 'User'  # the user who shared the portfolio
  belongs_to :shared_with, class_name: 'User'  # the user who was shared with
  belongs_to :portfolio  # the portfolio being shared
end

数据库中的“我的共享”表格（取自schema.rb）

  create_table "shares", force: true do |t|
    t.text     "message"
    t.integer  "portfolio_id" # the id of the portfolio shared
    t.integer  "shared_by_id" # the id of the sharer (user)
    t.integer  "shared_with_id" # the id of the person shared with (user)
    t.datetime "created_at"
    t.datetime "updated_at"
  end

我的用户模型： /app/models/user.rb

class User < ActiveRecord::Base 

  has_many :created_portfolios, foreign_key: 'creator_id', class_name: 'Portfolio'

  has_many :shares_by_me, foreign_key: 'shared_by', class_name: 'Share'
  has_many :shared_with_me, foreign_key: 'shared_with', class_name: 'Share'

  # portfolios the user has shared
  has_many :shared_portfolios, through: :shares_by_me, source: :portfolio, class_name: 'Portfolio'

  # portfolios that have been shared with the user
  has_many :portfolios_shared_with, through: :shared_with_me, source: :portfolio, class_name: 'Portfolio'

  ...
end

我的投资组合模型： /app/models/portfolio.rb

class Portfolio < ActiveRecord::Base

  has_many :shares

  # users this portfolio has been shared with
  has_many :shared_with, through: :shares, foreign_key: 'shared_with_id', class_name: 'User'
  # users that have shared this portfolio
  has_many :shared_by, through: :shares, foreign_key: 'shared_by_id', class_name: 'User'

  # the creator of the portfolio
  belongs_to :creator, class_name: 'User'

end

任何帮助将不胜感激！我有点疯了！

Answer 1

糟糕。

我几乎拥有它。我的user.rb文件中只有一个小错误：

而不是：

has_many :shares_by_me, foreign_key: 'shared_by', class_name: 'Share'

我需要：

has_many :shares_by_me, foreign_key: 'shared_by_id', class_name: 'Share'

对这么一件小事太多头疼了！但我猜这总是如此：）