javascript - DocumentHistoriesController# 中的 ActionController::UnknownFormat 和 format.js

Question

我正在尝试调用表单上的部分内容并进行部分更新，而不刷新表单的其余部分。

在我的投诉表中调用了部分内容

 <div id="refresh_assigned">
    <%= render :partial => '/document_histories/history_for_complaint_form' %>
 </div>

我正在\document_histories_history_for_complaint_form.html.erb 中调用删除

    <td><%= link_to 'Delete', history, method: :delete, data: { confirm: "Are you sure that you want to remove this users assignment to this complaint? \n \n The user will NOT be notified via email. "} %></td>

我在 document_histories Controller 中的销毁定义是

 def destroy
    @document_history.destroy
    respond_to do |format|

      format.js {}
      format.json { render :show, status: :ok, location: @document_history }

    end
  end

我有一个js文件\app\views\document_histories\destroy.js.erb

$('#refresh_assigned').html("<%= escape_javascript(render(:partial => 'document_histories/history_for_complaint_form')).html_safe %>");

我收到的错误是

ActionController::UnknownFormat in DocumentHistoriesController#destroy
ActionController::UnknownFormat
Rails.root: C:/Users/cmendla/RubymineProjects/internal_complaints
Application Trace | Framework Trace | Full Trace
app/controllers/document_histories_controller.rb:209:in `destroy'

第209行是respond_to do |format|

<小时/>

这是我在进行 Pavan 建议的更改后尝试删除时的日志。看起来我在尝试刷新 div 时遇到了 Nil 类错误

Started DELETE "/document_histories/364" for ::1 at 2016-02-23 09:22:21 -0500
Processing by DocumentHistoriesController#destroy as JS
  Parameters: {"id"=>"364"}
  [1m[35mUser Load (1.0ms)[0m  SELECT  "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1  [["id", 1]]
  [1m[36mDocumentHistory Load (0.0ms)[0m  [1mSELECT  "document_histories".* FROM "document_histories" WHERE "document_histories"."id" = ? LIMIT 1[0m  [["id", 364]]
  [1m[35m (0.0ms)[0m  begin transaction
  [1m[36mSQL (9.0ms)[0m  [1mDELETE FROM "document_histories" WHERE "document_histories"."id" = ?[0m  [["id", 364]]
  [1m[35m (11.0ms)[0m  commit transaction
  Rendered document_histories/_history_for_complaint_form.html.erb (2.0ms)
  Rendered document_histories/destroy.js.erb (5.0ms)
Completed 500 Internal Server Error in 42ms (ActiveRecord: 21.0ms)

ActionView::Template::Error (undefined method `each' for nil:NilClass):
     8:       <th> Remarks</th>
     9:     </tr>
    10: 
    11:   <% @document_histories.each do |history| %>
    12: 
    13: 
    14: 
  app/views/document_histories/_history_for_complaint_form.html.erb:11:in `_app_views_document_histories__history_for_complaint_form_html_erb___652294712_44088072'
  app/views/document_histories/destroy.js.erb:1:in `_app_views_document_histories_destroy_js_erb___293771988_76518024'


  Rendered C:/Ruby200/lib/ruby/gems/2.0.0/gems/actionpack-4.2.5/lib/action_dispatch/middleware/templates/rescues/_trace.text.erb (1.0ms)
  Rendered C:/Ruby200/lib/ruby/gems/2.0.0/gems/actionpack-4.2.5/lib/action_dispatch/middleware/templates/rescues/_request_and_response.text.erb (1.0ms)
  Rendered C:/Ruby200/lib/ruby/gems/2.0.0/gems/actionpack-4.2.5/lib/action_dispatch/middleware/templates/rescues/template_error.text.erb (19.0ms)

Answer 1

ActionController::UnknownFormat in DocumentHistoriesController#destroy

您需要在链接中添加 remote: true 才能将 JS 请求发送到 Controller 。

<%= link_to 'Delete', history, remote: true, method: :delete, data: { confirm: "Are you sure that you want to remove this users assignment to this complaint? \n \n The user will NOT be notified via email. "} %>

现在请求由 Controller 操作中的 format.js 处理。