Question

我有以下模型（venmas是遗留数据库，所以我无法改变它）：

models/venmas.rb
class Venmas < ActiveRecord::Base
  establish_connection "turnkey"
end

models/yard.rb
class Yard < ActiveRecord::Base
end

我希望能够做到：

Yard.first.venmas.first # to get the first record of venmas for that yard

以下是Yard的样子：

#<Yard id: 1, name: "nyssa", created_at: "2012-08-07 16:58:02", updated_at: "2012-08-07 16:58:02">

和Venmas：

#<Venmas VENDOR_NUMBER: "  ", ... , yard: "nyssa"> # there are a lot of columns in this one and they aren't important.

另一个猴子扳手我在inflections.rb：

ActiveSupport::Inflector.inflections do |inflect|
  inflect.irregular 'venmas', 'venmas'
end

我可以删除它，如果它更容易，但我对所有遗留表执行此操作，因为我只是从它们读取。

我确信这可以通过分配foreign_key来完成，但我不确定将这些关联起来的正确方法吗？

如果有任何遗漏，请告诉我。

Answer 1

想出来

models/venmas.rb
class Venmas < ActiveRecord::Base
  establish_connection "turnkey"
  belongs_to :yard, foreign_key: :yard, primary_key: :name
end

models/yard.rb
class Yard < ActiveRecord::Base
  has_many :venmas, foreign_key: :yard, primary_key: :name
end

仍然愿意接受更好的解决方案......

Active Record外键关联rails

1 个答案: