Rails 3.1 AJAX表单 - "ActionView :: Template :: Error(#ActionDispatch :: Flash :: FlashHash:0x00000102b73b78>的未定义方法`gsub'):"

Question

我刚刚更新到Rails 3.1并且创建模型对象的典型ajax表单在成功时产生以下错误: ActionView::Template::Error (undefined method gsub' for #<ActionDispatch::Flash::FlashHash:0x00000102b73b78>):

创建操作进展顺利,数据被提交到数据库,但页面不会更改,并且js不会执行.如果出现错误,js DOES可以正常工作,产生错误消息......所以只有成功产生错误并且无法执行js.

这是我的代码:

控制器:

def create
  @contact  = Contact.new(params[:contact])
  respond_to do |format|
    if @contact.save
      flash[:notice] = "Welcome!"
      format.html
      format.js
    else
      format.html { render 'pages/home'}
      format.js
    end
  end
end

查看表单

<div id="contact_notice"></div>
<%= form_for @contact, :remote => true do |f| %>
  <%= f.text_field :email, :id => 'email', 'data-default' => 'Sign up to join the beta!' %><%= f.submit "Submit", :id => 'submit' %>
<% end %>

/views/contacts/create.js.erb

<% if @contact.errors.any? %>

// Create errors
var errors = $('<div class="flash notice"></div>');
<% @contact.errors.full_messages.each do |error| %>
  errors.append('<%= escape_javascript( error ) %>');
<% end %>

// Display errors
$("#contact_notice").html(errors);

<% else %>

// Display success (clearing any errors)
$("#contact_notice").html('<div class="flash notice"><%=escape_javascript(flash.delete(:notice)) %></div>'); 
<% end %>

这是保存新联系人时的堆栈跟踪:

Rendered contacts/create.js.erb (0.6ms)
Completed 500 Internal Server Error in 13ms

ActionView::Template::Error (undefined method `gsub' for #<ActionDispatch::Flash::FlashHash:0x000001042b1970>):
12: <% else %>
13: 
14:   // Display success (clearing any errors)
15:   $("#contact_notice").html('<div class="flash notice"><%= escape_javascript(flash.delete(:notice)) %></div>'); 
16: 
17: <% end %>
app/views/contacts/create.js.erb:15:in `_app_views_contacts_create_js_erb__3535867194219445180_2168748520'
app/controllers/contacts_controller.rb:6:in `create'

如果你能看到我在这里缺少的东西,请告诉我.谢天谢地.

Answer 1

Rails改变了3.1中的一些工作方式,根据我的理解,Rails 3.1不再使用Hash作为FlashHash,现在它们基于Enumerable.这是一个更详细的答案.你应该可以使用:

flash.discard(:notice)

而不是旧的:

flash.delete(:notice)