Ruby on rails 4 尝试找出一个特定的RubyonRails习惯用法：动态访问对象'；会员协会

这应该很简单，但我找不到答案

我正在尝试动态调用对象上的成员关联

@user.account.id.inspect #This will inspect user's account id as normal
@user.group.id.inspect #Same as above only with group id
@user.foo.id.inspect #etc, etc, etc...

这是直截了当的。关于手头的问题

我想循环所有可能的情况：只有动态的关联和上面的操作

User.reflect_on_all_associations(:has_one).each do |association|
    #this works as normal
    association.name #returns "account", "group", "foo", etc...

    #The following won't work (Obviously)
    @user.{association.name}.id

    #I'm trying to find an idiom which
    #will essentially allow me to ninja swap "{association.name}"
    #with "account", "group", "foo", etc... Such that:
    #@user.{association.name}.id
    #...is functionally the same as @user.account.id, @user.group.id, @user.foo.id, etc...
end

仅供参考，PHP中的适当习惯用法与此类似：

$user->${$association->name}->id; #parses out to $user->account->id

---

谢谢

@user.send（association.name）.id应该有效。

这个答案非常简单