Ruby on rails Rails 3.2：使用具有非标准外键名的部分集合

我使用的是Rails 3.2。我有一个可交付的模型：

class Deliverable < ActiveRecord::Base
  # omitting attr_accessibles
  # omitting validations
  belongs_to :owner, class_name: "User", foreign_key: "owner_id"
  belongs_to :project
  belongs_to :event
end

这是

index.html.erb

：

<h1>Calendar</h1>
<%= render partial: "writer", collection: @writers %>

<h3><%= "#{writer.first_name} #{writer.last_name} %></h3>
<%= render partial: "writer_deliverables", collection: writer.deliverables %>

test

这是

\u writer\u deliveries.html.erb

：

<h1>Calendar</h1>
<%= render partial: "writer", collection: @writers %>

<h3><%= "#{writer.first_name} #{writer.last_name} %></h3>
<%= render partial: "writer_deliverables", collection: writer.deliverables %>

test

问题出在

\u writer.html.erb

中，由于非标准外键，当它试图呈现集合

writer.deliveries

时，出现以下错误：

PG::UndefinedColumn: ERROR:  column deliverables.user_id does not exist
LINE 1: ...ELECT "deliverables".* FROM "deliverables"  WHERE "deliverab...
                                                             ^
: SELECT "deliverables".* FROM "deliverables"  WHERE "deliverables"."user_id" = 2

---

我怎样才能告诉Rails外键列名实际上是

owner\id

？

哦，是的，我在发布五分钟后就知道了。我需要在我的用户模型中添加一个外键，如下所示：

class User < ActiveRecord::Base
  # omitting attr_accessibles
  # omitting validations
  has_and_belongs_to_many :projects #writers assigned to the project
  has_and_belongs_to_many :projects, join_table: "disclosed_users_projects" #users who have been disclosed on the project
  has_many :deliverables, foreign_key: "owner_id"
end

class用户