has_many通过与不同的外键

Question

我想从用户事件EventView.promoter_id = User.id，但它不能正常工作。这里是我的设置（目前不正确的）：

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" 

数据库被设置为：

User 
id 
..etc (irrelevant) 

Event 
id 
user_id 
...etc (irrelevant) 

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

我试图拨打：

User.all.first.promoted_events 

它的工作原理，但它给我错误的信息！它不涉及对EventViews（我想）的promoter_id，而是它使用USER_ID在活动

这里发生了什么数据库：

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 

这是很清楚的。 user_id = 1正在导致这个问题，我该如何将其更改为promoter_id = 1？我已经尝试在用户模型中设置primary_key和foreign_key，但它似乎被忽略。

ALSO：我尝试使用finder_sql但它在Rails的弃用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'