Ruby on rails 4 如何获取子ID集合[RubyonRails 4.2]

我是RubyonRails新手

我有两个模型

class Experience < ActiveRecord::Base
   has_and_belongs_to_many: assets
end

class Assets < ActiveRecord::Base
   has_and_belongs_to_many: experiences
end

---

我将如何做到这一点？

您的模型关系应该是：

class Experience < ActiveRecord::Base
   has_many: assets
end

class Assets < ActiveRecord::Base
  belongs_to: experience
end

---

我认为这段代码甚至无法启动（无效的ruby）

class Experience < ActiveRecord::Base
   has_many: assets
end

class Assets < ActiveRecord::Base
  belongs_to: experience
end

# single experience data
@experience = Experience.first
@experience.assets


# multiple experiences data
@experiences = Experience.all.includes(:assets)

# you can also use this in view
@experiences.each do |x|
  x.assets.each do |a|
    a.title (ex. field name)
    ...
  end
end