多态模型+控制器的Rails约定 [英] Rails convention for a polymorphic model + controller

问题描述

我有用户，组和页面.每条记录可以有图片.

I have users, groups, and pages. Each record can have pictures.

这是我的体系结构:

1. Pictures的多态模型.用户，组和页面是picturable.
每个用户，组和页面的
2. 嵌套pictures控制器(例如users/5/pictures)

1. Polymorphic model for Pictures. Users, groups, and pages are picturable.
2. Nested pictures controller for each of users, groups, and pages (e.g. users/5/pictures)

这是最标准的设置吗?我会忘记任何Rails约定吗?

Is this the most standard set up? Am I forgetting any Rails convention?

routes.rb示例如下:

resources :users do
  resources :pictures

pictures_controller.rb看起来像这样:

class PicturesController < ApplicationController
  before_filter :load_picturable

  def show
    @picture = @picturable.pictures.find(:id)
  end

  # Get permissible for different objects.
  def load_picturable
    resource, id = request.path.split('/')[1,2] # /photos/1 
    # Couples this controller to format of URL, not ideal.
    @picturable = resource.singularize.classify.constantize.find(id)
  end
end

推荐答案

是的.这几乎是我过去需要多态图像模型的项目中一直使用的.

Yup. That's pretty much what I've been using from my past projects that have required polymorphic image models.

在我的最新项目中，我将多态关系标记为可上传，并且使用相同的方法来获取URL数据.

In my latest project, I labelled my polymorphic relation as uploadable and I used the same approach to get URL data.

def load_uploadable
    resource, id = request.path.split('/')[1,2]
    @uploadable = resource.singularize.classify.constantize.find(id)
end

如果有帮助，这是我的表演功能.

Here's my show function if it helps.

def show
@asset = Asset.find(params[:id])
@assets = @uploadable.assets
respond_to do |format|
  format.html
  format.json { render json: @asset}
end

结束

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