问题以嵌套模型形式显示错误消息

时间:2011-01-22 02:08:17

标签: ruby-on-rails-3 nested-forms

我无法弄清楚如何显示错误消息 - 事实上甚至会在错误时显示页面。

以下是我目前的情况:

media.rb

class Media < ActiveRecord::Base

  belongs_to :project
  has_attached_file :media_file, :default_url => '/media_file/missing.png'

  validates :description, :presence => true
  validates_attachment_content_type :media_file, :content_type => ['image/gif', 'image/jpg', 'image/jpeg', 'image/png', 'audio/mpeg', 'audio/wav']

  MEDIA_TYPES = ["Image", "Audio", "Video"]
end

_form.html.erb

<%= form_for [@project, @media], :html => {:multipart => true} do |f| %>
  <% if @media.errors.any? %>
    <div id="error_explanation">
     <h2><%= pluralize(@media.errors.count, "error") %> prohibited this media from being saved:</h2>
     <ul>
       <% @media.errors.full_messages.each do |msg| %>
         <li><%= msg %></li>
       <% end %>
     </ul>
    </div>
  <% end %>
. 
.
.
<% end %>

的routes.rb

resources :medias, :only => [:destroy, :update]
resources :projects do
  resources :medias, :only => [:create, :edit, :index, :new, :show, :update]
end

medias_controller.rb

def new
  @project = Project.find params[:project_id]
  @media = Media.new(:project=>@project)

  respond_to do |format|
    format.html # new.html.erb
    format.xml  { render :xml => @media }
  end
end

def create
  @media = Media.new(params[:media])

  @media.project_id = params[:project_id]

  respond_to do |format|
    if @media.save
      format.html { redirect_to(@media.project, :notice => 'Media was successfully created.') }
      format.xml  { render :xml => @media, :status => :created, :location => @media }
    else
      format.html { render :action => "new" }
      format.xml  { render :xml => @media.errors, :status => :unprocessable_entity }
    end
  end
end

def update
  @media = Media.find(params[:id])

  respond_to do |format|
    if @media.update_attributes(params[:media])
      format.html { redirect_to(@media.project, :notice => 'Media was successfully updated.') }
      format.xml  { head :ok }
    else
      format.html { render :action => "edit" }
      format.xml  { render :xml => @media.errors, :status => :unprocessable_entity }
    end
  end
end

当前的问题是,在尝试使用验证问题为项目创建新的 media 记录时,出现以下错误:


ActionMedtroller :: Medias中的RoutingError #create 显示D:/test/app/views/medias/new.html.erb,第5行引出:

没有路线匹配{:action =&gt;“destroy”,:controller =&gt;“projects”}

提取的来源(第5行): 2: 3:&lt;%= render'形式'%&gt; 4: 5:&lt;%= link_to'Back',project_path(@project)%&gt;


此错误导致的网址为:http://localhost:3000/projects/16/medias(“新”页面的网址为http://localhost:3000/projects/16/medias/new)。没有任何验证问题,“创造”就会通过。我能够“编辑”现有记录而不会出现问题,其中包括在需要时显示验证错误 - 但是“编辑”验证仅在我将“:update”添加到资源:medias和资源时发生:medias嵌套在:projects中。我不确定这是不是一个好主意。

非常感谢任何有关如何使其发挥作用的见解。

0 个答案:

没有答案