Rails 4-从公共部分渲染STI模型

Question

我有这样的STI模型： Photo < Medium和Video < Medium 。 在某个地方，我想向他们展示：

# app/views/albums/show.html.slim
ul
  li= render @album.media

render搜索albums/_photo或albums/_video部分内容：

# app/views/albums/_photo.html.slim
h3= photo.title
= image_tag photo.file.url
p= photo.description

# app/views/albums/_video.html.slim
h3= video.title
= video_tag video.file.url
p= video.description

现在，我想制作一个模板，以在app/views/albums/show.html.slim ，以免媒体之间重复公共字段。 像这样：

# app/views/albums/_medium.html.slim
h3= medium.title
= yield(:medium_tag)
p= medium.description
= yield(:medium_additionnals)

# app/views/albums/_photo.html.slim
- content_for(:medium_tag) do
  = image_tag photo.file.url
- content_for(:medium_additionnals) do
  # any additionnals fields

# app/views/albums/_video.html.slim
- content_for(:medium_tag) do
  = video_tag video.file.url
- content_for(:medium_additionnals) do
  # any additionnals fields

但这使我产生了串联内容...

有人有解决方案/替代方法吗？

[编辑]

使用此模板：

# app/views/albums/show.html.slim
= render @album.media

# app/views/albums/_medium.html.slim
div
  h3= medium.title
  = yield(:medium_tag)

# app/views/albums/_photo.html.slim
- content_for(:medium_tag) do
  | TEST

结果HTML：

<div>
  <h3>Photo1</h3>
  TEST
</div>
<div>
  <h3>Photo2</h3>
  TESTTEST
</div>
<div>
  <h3>Photo3</h3>
  TESTTESTTEST
</div>
<div>
  <h3>Photo4</h3>
  TESTTESTTESTTEST
</div>
...

产量结果的连接时间与媒体数量一样多。

Answer 1

您的代码看起来确实不错，尽管我不了解您的render调用如何遍历每个medium项目

您可以使用helper来返回相关数据，尽管那不是最有效的方法：

#app/helpers/application_helper.rb
module ApplicationHelper
      output =  Slim::Engine.new  "h3={item.title}"
      output += Slim::Engine.new  "- eval(#{item.model_name.human}_tag) item.file.url"
      output += Slim::Engline.new "p=item.description"
   end
end

这将允许您运行：

#app/views/albums/_photo.html.slim
= media photo

#app/views/albums/_video.html.slim
= media video

-

或者，您可以将其放入_medium部分中：

#app/views/albums/_photo.html.slim
= render partial: "medium", locals: { item: photo }

#app/views/albums/_video.html.slim
= render partial: "medium", locals: { item: video }

_medium将具有以下内容：

#app/views/albums/_medium.html.slim
h3=item.title
- eval("#{item.model_name.human}_tag") item.file.url
p=item.description