Question

我正在转换标准的脚手架生成的应用程序，以类似于http://stjhimy.com/posts/07-creating-a-100-ajax-crud-using-rails-3-and-unobtrusive-javascript中指定的方式使用AJAX和JQuery。

我按照所有说明操作：

使用2个部分创建复合索引视图;
更新了控制器，仅保留了索引，创建，编辑，更新和销毁操作;
为使用JQuery函数更新DOM的创建，编辑，更新和销毁操作创建了js.erb文件。

似乎无法访问js.erb文件。将js.erb放在视图文件中，例如app/views/customers/create.js.erb

create.js.erb的代码是：

<% if @customer.errors.any? -%> 

   /*Hide the Flash Notice div*/
   $("#flash_notice").hide(300);

   /*Update the html of the div customer_errors with the new one*/
   $("#customer_errors").html("<% @customer.errors.full_message.each do |msg| %>
                              <li><%= msg %></li>
                              <% end %>");

   /*Show the div customer_errors*/
   $("#cust0mer_errors").show(300);

<% else -%>

   /*Hide the div customer_errors*/
   $("#customer_errors").hide(300);

   /*Update the html of the div flash_notice with the new one */
   $("#flash_notice").html("<%= flash[:notice] %>");

   /*Show the flash_notice div*/
   $("#flash_notice").show(300);

   /*Clear the entire form*/
   $(":input:not(input[type=submit])").val("");

   /*Replace the html of the div posts_list with the updated new one*/
   $("#customers_list").html("<%= render "customers" %>";

   <% end %>

表格的代码如下：

index.html.erb文件

<div id="customer_form"><%= render 'form' %></div>
<div id="customers_list"><%= render 'customers' %></div>

_form.html，erb部分文件

<%= form_for(@customer, :remote => true) do |f| %>


  <div id="customer_errors" style="display:none"></div>

  <div class="field">
    <%= f.label :firstname %>
    <%= f.text_field :firstname %>
    <%= f.label :lastname %>
    <%= f.text_field :lastname %>
  </div>
  <div class="field">
    <%= f.label :email %>
    <%= f.text_field :email %>
    <%= f.label :phone %>
    <%= f.text_field :phone %>
  </div>
  <div class="field">
    <%= f.label :password %>
    <%= f.text_field :password %>
    <%= f.label :address_id %>
    <%= f.text_field :address_id %>
  </div>
  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

_customers.html.erb部分的文件是：

<table>
  <tr>
    <th>Firstname</th>
    <th>Lastname</th>
    <th>Email</th>
    <th>Phone</th>
    <th>Password</th>
    <th>Address</th>
    <th></th>
    <th></th>
    <th></th>
  </tr>

<% @customers.each do |customer| %>
  <tr>
    <td><%= customer.firstname %></td>
    <td><%= customer.lastname %></td>
    <td><%= customer.email %></td>
    <td><%= customer.phone %></td>
    <td><%= customer.password %></td>
    <td><%= customer.address_id %></td>
    <td><%= link_to 'Edit', edit_customer_path(customer), :remote => true %></td>
    <td><%= link_to 'Destroy', customer, :remote => true, :confirm => 'Are you sure?', :method => :delete %></td>
  </tr>
<% end %>
</table>

修改

最新版本的客户控制器：

class CustomersController < ApplicationController

  before_filter :load

  def load
    @customers = Customer.all
    @customer  = Customer.new
  end

  def index   
  end


  def create
    @customer = Customer.new(params[:customer])
    if @customer.save
      flash[:notice] = "Customer was successfully created."
      @customers = Customer.all
      respond_to do |format|
        format.js
      end 

    end
  end 

  def edit
    @customer = Customer.find(params[:id])
    respond_to do |format|
      format.js
    end
  end

  def update
    @customer = Customer.find(params[:id])
    if @customer.update_attributes(params[:customer])
      flash[:notice] = "Customer was successfully updated."
      @customers = Customer.all
      respond_to do |format|
        format.js
      end   
    end
  end  

  def destroy
    @customer = Customer.find(params[:id])
    @customer.destroy
    flash[:notice] = "Customer successfully destroyed"
    @customers = Customer.all
    respond_to do |format|
      format.js
    end
  end
end

最新版本的布局模板在我将Jquery.js文件传递给rails.js之后包含以下标签

    <%= stylesheet_link_tag :all %>
      <%= javascript_include_tag 'http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js' %>
      <%= javascript_include_tag 'rails' %>
      <%= csrf_meta_tag %>

最新日志：

Started GET "/customers" for 127.0.0.1 at Wed Dec 14 21:16:14 +0000 2011
  Processing by CustomersController#index as HTML
  Customer Load (1.3ms)  SELECT "customers".* FROM "customers"
Rendered customers/_form.html.erb (14.1ms)
Rendered customers/_customers.html.erb (28.1ms)
Rendered customers/index.html.erb within layouts/application (47.6ms)
Completed 200 OK in 74ms (Views: 56.3ms | ActiveRecord: 1.3ms)


Started GET "/customers/13/edit" for 127.0.0.1 at Wed Dec 14 21:17:20 +0000 2011
  Processing by CustomersController#edit as JS
  Parameters: {"id"=>"13"}
  Customer Load (1.1ms)  SELECT "customers".* FROM "customers"
  Customer Load (0.5ms)  SELECT "customers".* FROM "customers" WHERE "customers"."id" = 13 LIMIT 1
Rendered customers/_form.html.erb (16.1ms)
Rendered customers/edit.js.erb (17.6ms)
Completed 200 OK in 43ms (Views: 27.6ms | ActiveRecord: 1.5ms)


Started GET "/customers/13/edit" for 127.0.0.1 at Wed Dec 14 21:17:31 +0000 2011
  Processing by CustomersController#edit as JS
  Parameters: {"id"=>"13"}
  Customer Load (1.0ms)  SELECT "customers".* FROM "customers"
  Customer Load (0.3ms)  SELECT "customers".* FROM "customers" WHERE "customers"."id" = 13 LIMIT 1
Rendered customers/_form.html.erb (25.9ms)
Rendered customers/edit.js.erb (28.8ms)
Completed 200 OK in 52ms (Views: 39.0ms | ActiveRecord: 1.3ms)


Started DELETE "/customers/18" for 127.0.0.1 at Wed Dec 14 21:18:31 +0000 2011
  Processing by CustomersController#destroy as JS
  Parameters: {"id"=>"18"}
  Customer Load (1.0ms)  SELECT "customers".* FROM "customers"
  Customer Load (0.4ms)  SELECT "customers".* FROM "customers" WHERE "customers"."id" = 18 LIMIT 1
  AREL (0.4ms)  DELETE FROM "customers" WHERE "customers"."id" = 18
  Customer Load (0.7ms)  SELECT "customers".* FROM "customers"
Rendered customers/_customers.html.erb (120.3ms)
Rendered customers/destroy.js.erb (122.1ms)
Completed 200 OK in 198ms (Views: 134.1ms | ActiveRecord: 2.5ms)


Started GET "/customers" for 127.0.0.1 at Wed Dec 14 21:20:00 +0000 2011
  Processing by CustomersController#index as HTML
  Customer Load (1.6ms)  SELECT "customers".* FROM "customers"
Rendered customers/_form.html.erb (19.1ms)
Rendered customers/_customers.html.erb (23.8ms)
Rendered customers/index.html.erb within layouts/application (50.6ms)
Completed 200 OK in 76ms (Views: 54.9ms | ActiveRecord: 1.6m

Answer 1

创建form和link_to对象时，需要确保它们上面有:remote => true，否则路由不会通过JS呈现操作。相反，它将使用默认HTML呈现它。

一个例子：

<%= form_for(@post, :remote => true) do |f| %>

或

<%= link_to "Edit", edit_post_path(post), :remote => true %>

另外，请确保安装了最新的jQuery和jQuery Rails适配器：https://github.com/rails/jquery-ujs

作为旁注，如果您为CRUD操作执行100％ajax，则上面的代码中不需要format.html，因为您将呈现的所有内容都是JS文件（format.js）

<强>更新我认为你误解了一些事情......你正在阅读的教程只谈到将CRUD（创建，读取，更新，删除）操作改为100％ajax调用，这意味着他们是唯一会回复渲染的人{ {1}}个文件。因此，当您检查该网页是否为.js.erb时，仅将适用于Processing SomeController#some_action as JS，create，show和{{1}客户控制器中的操作。

对于Rails 3.0上的jQuery和jQuery-UJS安装，请按照以下说明操作：

确保删除rails.js文件（如果存在），而是使用新的jquery_ujs.js文件复制到公共目录。如果出现提示，请选择覆盖jquery_ujs.js。

然后运行update

将布局模板更改为：

destroy

我不得不说，你正在阅读的教程是关于我读过的最糟糕的教程。因为你似乎对Ruby on Rails很新，所以我高度建议你阅读一个不同的教程（如果你还想阅读关于带有Rails的AJAX：http://net.tutsplus.com/tutorials/javascript-ajax/using-unobtrusive-javascript-and-ajax-with-rails-3/甚至像这一个非常好的东西可以更好地学习Rails：http://ruby.railstutorial.org/ruby-on-rails-tutorial-book）。

在Rails 3中处理js.erb文件

1 个答案: