ruby-on-rails-3 - ActiveAdmin - 将本地人传递给表单

Question

在我的 photos.rb 文件中我有:

ActiveAdmin.register Photo do
  form :partial => 'admin/forms/photo', :locals => { :events => Event.all }
end

在我的 _photo.html.erb 文件中，我希望能够访问事件的值，但它似乎无法检测到。我该怎么做？

根据评论中的要求，这是我的表格:

<% if events.any? %>
  <%= form_for [:admin, @photo], :validate => true do |f| %>
    <!-- insert a bunch of standard field divs here -->
    <div class="actions" style="margin-top: 20px">
      <% if @photo.new_record? %>
        <%= f.submit 'Create photo' %>
      <% else %>
        <%= f.submit 'Update photo' %>
      <% end %>
    </div>
  <% end %>
<% else %>
  <div style="font-size: 14px">
    You cannot add photos until you have added at least one event.
  </div>
<% end %>

我收到的错误消息围绕 events.any? 行:

Completed 500 Internal Server Error in 108ms

ActionView::Template::Error (undefined local variable or method `events' for #<#<Class:0x007fdb8e841b80>:0x007fdb8a93e7a8>)

Answer 1

form do |f|
  f.render partial: 'admin/forms/photo', locals: { f: f, events: Event.all }
end

请注意，您需要从您的部分中删除 form_for、semantic_form_for、active_admin_form_for 等，因为它将被 form do部分在admin/photos.rb中，否则会出现两个嵌套的form。

部分示例:

# app/views/admin/forms/_photo.html.arb
if events.any?
  f.inputs do
    f.input :title, label: 'Etc'
    f.input :file
  end
  f.actions
else
  f.div 'You cannot add photos until you have added at least one event.', 
        style: 'font-size: 14px'
end