ruby-on-rails - 设置:has_many :through association on a belongs_to association Ruby on Rails

我有三个模型，每个模型具有以下关联:

class Model1 < ActiveRecord::Base
  has_many :model2s
  has_many :model3s
end

class Model2 < ActiveRecord::Base
  belongs_to :model1
  has_many :model3s, :through => :model1  # will this work? is there any way around this?
end

class Model3 < ActiveRecord::Base
  belongs_to :model1
  has_many :model2s, :through => :model1  # will this work? is there any way around this?
end

正如您在评论文本中所看到的，我已经提到了我所需要的。

最佳答案

您只需创建访问它的方法

class Model2 < ActiveRecord::Base
  belongs_to :model1

  def model3s
    model1.model3s
  end
end

或者，您可以将model3s方法委托(delegate)给model1

class Model2 < ActiveRecord::Base
  belongs_to :model1

  delegate :model3s, :to => :model1

end

关于ruby-on-rails - 设置:has_many :through association on a belongs_to association Ruby on Rails，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/3864143/