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我试图在模型属性中设置一个带有 id 的数组，就像在https://github.com/soveran/ohm#models中解释的那样，但我得到了一个例外。我的代码有什么问题？

模型

class Event < Ohm::Model

attribute :title
set :attendees, :User

end

测试

@fran = User.create(name: "Fran", email: 'fran@gmail.com')
@jose = User.create(name: "Jose", email: 'jose@hotmail.com')

event = Event.create(title: 'Party in Las Vegas', attendees: [@fran.id,@jose.id])

NoMethodError: undefined method `attendees=' for #<Event:0x000000020fb430>
    /home/ciro/.rvm/gems/ruby-2.1.3/gems/ohm-2.0.1/lib/ohm.rb:1470:in `block in update_attributes'
    /home/ciro/.rvm/gems/ruby-2.1.3/gems/ohm-2.0.1/lib/ohm.rb:1470:in `each'
    /home/ciro/.rvm/gems/ruby-2.1.3/gems/ohm-2.0.1/lib/ohm.rb:1470:in `update_attributes'
4

1 回答 1

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您需要使用该Set#add方法才能工作，并且该方法只需要 1 个参数：

@fran = User.create(name: "Fran", email: 'fran@gmail.com')
@jose = User.create(name: "Jose", email: 'jose@hotmail.com')

event = Event.create(title: 'Party in Las Vegas')
event.attendees.add(@fran)
event.attendees.add(@jose)

如果这些是关联，那么我会看看collections

于 2015-01-02T12:25:47.780 回答