Rails模型的动态关注点(Dynamic concerns for a Rails model)

Rails模型的动态关注点(Dynamic concerns for a Rails model)

对于一个项目，我需要能够将视频上传到视频服务器。 起初，范围只是上传到Kaltura视频服务器。 为了实现这一点，我创建了一个简单的关注点，它为处理上传的模型添加了一些回调方法。

这些回调方法（特别是对于Kaltura）正在加载如下：

class Videofile < ActiveRecord::Base include KalturaBox::Entry end

它们包含这样的基础知识（简化版）：

module KalturaBox module Entry extend ActiveSupport::Concern included do before_save :create_kaltura_item, on: :create private def create_kaltura_item puts 'create callback called' self.upload end end end

现在范围已经扩大，我被要求也包括Vimeo上传作为选项。

是否可以根据模型的属性动态嵌入关注点，还是应该考虑使用STI？

我正在考虑创建一个名为“video_type”的下拉列表。 如何根据该属性包含正确的代码？

For a project I needed the ability to upload video's to a video server. At first the scope was to only upload to a Kaltura video server. To enable this, I created a simple concern that added some callback methods to the model which handle the uploads.

These callback methods (specifically for Kaltura) are being loaded like so:

class Videofile < ActiveRecord::Base include KalturaBox::Entry end

And they contain basics like this (simplified version):

module KalturaBox module Entry extend ActiveSupport::Concern included do before_save :create_kaltura_item, on: :create private def create_kaltura_item puts 'create callback called' self.upload end end end

Now the scope has broadened, and I was asked to also include Vimeo uploads as an option.

Is it possible to dynamically embed the concerns based on an attribute of the model, or should I consider using STI instead?

I was thinking about creating a drop-down called "video_type". How do I include the correct code based on that attribute?

最满意答案

我正在考虑创建一个名为“video_type”的下拉列表。 如何根据该属性包含正确的代码？

使用条件回调 。

before_save :create_kaltura_item, on: :create, if: :kaltura? def kaltura? video_type == 'kaltura' end

这样您就可以静态地包含这两个问题。

I was thinking about creating a drop-down called "video_type". How do I include the correct code based on that attribute?

Use conditional callbacks.

before_save :create_kaltura_item, on: :create, if: :kaltura? def kaltura? video_type == 'kaltura' end

This way you can include both concerns statically.