STI，一个控制器 [英] STI, one controller

问题描述

我是 Rails 的新手，我有点被这个设计问题困住了，这可能很容易解决，但我无处可去:我有两种不同的广告:亮点和特价.它们都具有相同的属性:标题、描述和一张图像(带回形针).它们也可以应用相同类型的操作:索引、新建、编辑、创建、更新和销毁.

I'm new to rails and I'm kind of stuck with this design problem, that might be easy to solve, but I don't get anywhere: I have two different kinds of advertisements: highlights and bargains. Both of them have the same attributes: title, description and one image (with paperclip). They also have the same kind of actions to apply on them: index, new, edit, create, update and destroy.

我像这样设置了 STI:

I set a STI like this:

广告模型:ad.rb

class Ad < ActiveRecord::Base
end

讨价还价模式:trade.rb

Bargain Model: bargain.rb

class Bargain < Ad
end

高亮模型:highlight.rb

Highlight Model: highlight.rb

class Highlight < Ad
end

问题是我只想有一个控制器 (AdsController) 来执行我根据 URL 在特价或亮点上所说的操作，比如 www.foo.com/bargains[/...] 或 www.foo.com/highlights[/...].

The problem is that I'd like to have only one controller (AdsController) that executes the actions I said on bargains or highlights depending on the URL, say www.foo.com/bargains[/...] or www.foo.com/highlights[/...].

例如:

• 获取 www.foo.com/highlights => 所有重点广告的列表.
• GET www.foo.com/highlights/new => 表单以创建新的亮点等等...

我该怎么做?

谢谢！

推荐答案

首先.添加一些新路线:

First. Add some new routes:

resources :highlights, :controller => "ads", :type => "Highlight"
resources :bargains, :controller => "ads", :type => "Bargain"

并修复AdsController 中的一些操作.例如:

And fix some actions in AdsController. For example:

def new
  @ad = Ad.new()
  @ad.type = params[:type]
end

有关所有控制器工作的最佳方法，请查看此评论

仅此而已.现在你可以去 localhost:3000/highlights/new 并且新的 Highlight 将被初始化.

That's all. Now you can go to localhost:3000/highlights/new and new Highlight will be initialized.

索引操作可以如下所示:

Index action can look like this:

def index
  @ads = Ad.where(:type => params[:type])
end

转到localhost:3000/highlights，将出现亮点列表.
讨价还价的相同方式:localhost:3000/bargains

Go to localhost:3000/highlights and list of highlights will appear.
Same way for bargains: localhost:3000/bargains

等

网址

<%= link_to 'index', :highlights %>
<%= link_to 'new', [:new, :highlight] %>
<%= link_to 'edit', [:edit, @ad] %>
<%= link_to 'destroy', @ad, :method => :delete %>

因为是多态的 :)

<%= link_to 'index', @ad.class %>

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