Question

我有两个型号

class User < ActiveRecord::Base
  has_many :resources
end

class Resource < ActiveRecord::Base
  belongs_to :user
  has_many :resource_images, :dependent => :destroy
  has_many :resource_activities, :dependent => :destroy
end

控制器：

resource = Resource.where(:id => params[:id])
render :json => resource, :include => [:resource_images, :resource_activities, :user], :status => 200

是否有一种简单的方法可以过滤从用户模型返回的列？

问候。

Answer 1

当然，你可以这样做：

render :json => resource, :include => {:resource_images => only: {[:id, :your_column]}, :resource_activities, :user }, :status => 200

或使用除了：

render :json => resource, :include => {:resource_images => { except: [:id, :your_column]}, :resource_activities, :user }, :status => 200

如果需要，您甚至可以包含方法：

render :json => resource, :include => { resource_images: { methods: :thumbnail}, :resource_activities, :user }, :status => 200

如果你想阅读更多内容，这里有一篇非常好的文章：https://quickleft.com/blog/keeping-your-json-response-lean-in-rails/

rails指定包含列

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