属于具有自定义类名称的,在Rails 3中没有生成正确的外键

我正在将一个应用程序更新到Rails3,并且在创建自定义外键时遇到问题。我有这样的想法:

class Product < ActiveRecord::Base
  belongs_to :owner, :class_name => 'User'
...
end

class User < ActiveRecord::Base
  has_many :products
...
end

class ProductsController < ApplicationController
  before_filter :authenticate_user!

  def index
    @products = current_user.products
  end
end

视图:

<%- @products.each do |p| -%>
    <%= p.created_at %><br />
<%- end -%>

Mysql::Error: Unknown column 'products.user_id' in 'where clause': SELECT     `products`.* FROM       `products` WHERE     (`products`.user_id = 1)

它应该看到 belongs_to :owner 并查找一个名为 owner_id