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我正在尝试设置我的页面以从主页添加链接。它更新数据库中的链接，但不刷新内容。这是我所拥有的：

控制器/home_controller.rb

class HomeController < ApplicationController
  def create
    if user_signed_in?
      @new_link = Link.create(:link => params[:email])
      respond_to do |format|
        format.js do
        end
     end
  end
end

意见/主页/index.html.haml

#home
  = render "shares/home_links"

意见/分享/_home_links.html.haml

= simple_form_for Link.new, :remote => true do |f|
  .form-inputs
    = f.input :name, :required => true, :autofocus => true
    = f.input :url, :required => true
    = f.collection_select :category_id, Category.where(:user_id => current_user.id), :id, :name

  .form-actions
    = f.submit 'Save', :class => 'btn btn-info'

意见/主页/create.js.erb

$('#home').replaceWith("<%= escape_javascript(render :partial => 'shares/home_links') %>");

Firebug 控制台显示

POST http://localhost:3000/links 302 Moved Temporarily
GET http://localhost:3000/links/45 200 OK (spinner keeps going and browser is slow until I hit refresh)

终端输出为：

Started POST "/links" for 127.0.0.1 at 2012-11-17 23:25:24 -0800
Processing by LinksController#create as JS
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"KPSpEcdrPf1mWMesKT96UY/j1Wozze30LUlno1npT4A=", "link"=>{"name"=>"localhost:3000", "url"=>"http://localhost:3000/", "category_id"=>"5"}, "commit"=>"Save"}
  User Load (0.3ms)  SELECT `users`.* FROM `users` WHERE `users`.`id` = 1 LIMIT 1
   (0.1ms)  BEGIN
  SQL (0.3ms)  INSERT INTO `links` (`category_id`, `created_at`, `name`, `position`, `updated_at`, `url`, `user_id`) VALUES (5, '2012-11-18 07:25:24', 'localhost:3000', NULL, '2012-11-18 07:25:24', 'http://localhost:3000/', 1)
   (0.9ms)  COMMIT
   (0.1ms)  BEGIN
   (0.1ms)  COMMIT
Redirected to http://localhost:3000/links/45
Completed 302 Found in 6ms (ActiveRecord: 1.7ms)


Started GET "/links/45" for 127.0.0.1 at 2012-11-17 23:25:24 -0800
Processing by LinksController#show as JS
  Parameters: {"id"=>"45"}
  Link Load (0.4ms)  SELECT `links`.* FROM `links` WHERE `links`.`id` = 45 LIMIT 1
  Rendered links/show.html.haml within layouts/application (0.9ms)
  User Load (0.3ms)  SELECT `users`.* FROM `users` WHERE `users`.`id` = 1 LIMIT 1
  Rendered layouts/_header.html.haml (2.6ms)
  Rendered layouts/_flash.html.haml (0.2ms)
Completed 200 OK in 22ms (Views: 20.5ms | ActiveRecord: 0.7ms)
4

1 回答 1

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由于该行，内容没有被刷新simple_form_for Link.new, ...。每次表单呈现时，您都在实例化一个新的链接对象，而不是检查是否@new_link已设置实例变量。尝试将其更改为：

simple_form_for @new_link || Link.new, ...

编辑：再想一想，简单地用一个新的替换当前在浏览器中呈现的表单可能不会更新字段，因为浏览器正在管理表单的内部状态。您必须使用 javascript 手动设置字段的值。例如，在 create.js.erb 中：

$('#id-for-name-field').val(@new_link.name)
$('#id-for-url-field').val(@new_link.url)
...
于 2012-11-18T08:07:54.473 回答