Rails 表单中的多个对象 [英] Multiple objects in a Rails form

问题描述

我想以一种形式编辑模特照片的多个项目.我不确定如何用表单正确地呈现和发布它，以及如何在控制器的更新操作中收集项目.

I want to edit multiple items of my model photo in one form. I am unsure of how to correctly present and POST this with a form, as well as how to gather the items in the update action in the controller.

这就是我想要的:

<form>
<input name="photos[1][title]" value="Photo with id 1" />
<input name="photos[2][title]" value="Photo with id 2" />
<input name="photos[3][title]" value="Custom title" />
</form>

参数只是一个例子，就像我上面所说的:我不确定以这种形式发布这些值的最佳方式.

The parameters are just an example, like I stated above: I am not sure of the best way to POST these values in this form.

在控制器中我想要这样的东西:

In the controller I want to something like this:

@photos = Photo.find( params[photos] )
@photos.each do |photo|
    photo.update_attributes!(params[:photos][photo] )
end

推荐答案

在 Rails 4 中，就这样

In Rails 4, just this

<%= form_tag photos_update_path do %>
  <% @photos.each do |photo| %> 
    <%= fields_for "photos[]", photo do |pf| %>
      <%= pf.text_field :caption %>
      ... other photo fields

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