has_many通過與不同的外鍵

Question

我想從用戶事件EventView.promoter_id = User.id，但它不能正常工作。這裏是我的設置（目前不正確的）：

User 
has_many :events 
has_many :promoted_event_views, :foreign_key => :promoter_id, :class_name => "EventView" 
has_many :promoted_events, :through => :event_views, :foreign_key => :promoter_id #foreign key seems to be getting ignored 

EventView 
belongs_to :event 
belongs_to :promoted_event, :class_name => "Event", :foreign_key => :event_id 
belongs_to :promoter, :foreign_key => :promoter_id, :class_name => "User" 

數據庫被設置爲：

User 
id 
..etc (irrelevant) 

Event 
id 
user_id 
...etc (irrelevant) 

EventView 
id 
user_id 
event_id 
promoter_id 
...etc (irrelevant) 

我試圖撥打：

User.all.first.promoted_events 

它的工作原理，但它給我錯誤的信息！它不涉及對EventViews（我想）的promoter_id，而是它使用USER_ID在活動

這裏發生了什麼數據庫：

User Load (0.2ms) SELECT `users`.* FROM `users` ORDER BY `users`.`id` ASC LIMIT 1 
Event Load (2.1ms) SELECT `events`.* FROM `events` INNER JOIN `event_views` ON `events`.`id` = `event_views`.`event_id` INNER JOIN `events` `events_promoted_events_join` ON `event_views`.`event_id` = `events_promoted_events_join`.`id` WHERE `events_promoted_events_join`.`user_id` = 1 

這是很清楚的。 user_id = 1正在導致這個問題，我該如何將其更改爲promoter_id = 1？我已經嘗試在用戶模型中設置primary_key和foreign_key，但它似乎被忽略。

ALSO：我嘗試使用finder_sql但它在Rails的棄用4

Answer 1

User 
has_many :events 
has_many :promoted_event_views, :foreign_key => 'promoter_id' 
has_many :event_views 
has_many :promoted_events, :through => :event_views, :source => :promoted_event 

EventView 
belongs_to :user 
belongs_to :promoted_event, :class_name => "Event", :foreign_key => 'event_id' 
belongs_to :promoter, :foreign_key => 'promoter_id', :class_name => 'User'