belongs_to with :conditions in Rails 4

问题

I have two models, Users and Accounts:

class User < ActiveRecord::Base
  belongs_to :account, :conditions=>proc{" company_account = #{self.company_user} "}
end

class Account < ActiveRecord::Base
  has_many :users
end

In Rails 3 belongs_to and :conditions=> works fine, but in Rails 4 I read this options is not valid.

I tried belongs_to :account, -> {where company_account: self.company_user} but I get error undefined methodcompany_user

How can I solve this in Rails 4?

回答1:

Try something like:

belongs_to :account, -> { where("company_account_id = ?", self.send(:company_user).id) }

回答2:

I solved my problem, by using a composed primary key in my Account model.

For this, I used this gem

来源：https://stackoverflow.com/questions/24275835/belongs-to-with-conditions-in-rails-4