Ruby on rails 从多态关联重定向

Ruby on rails 从多态关联重定向,ruby-on-rails,redirect,Ruby On Rails,Redirect,我有一个评论模型,它属于两个模型:提交和发布 class Comment < ActiveRecord::Base attr_accessible :content, :show belongs_to :commentable, :polymorphic => true end class Submission < ActiveRecord::Base has_many :comments, :as => :commentable, :dependent

我有一个评论模型,它属于两个模型:提交和发布

class Comment < ActiveRecord::Base
  attr_accessible :content, :show
  belongs_to :commentable, :polymorphic => true
end

class Submission < ActiveRecord::Base
    has_many :comments, :as => :commentable, :dependent => :destroy
end
寻觅比赛

def find_contest
    @contest = Contest.find(params[:contest_id])
end
查找可评论的内容:

def find_commentable
  params.each do |name, value|
    if name =~ /(.+)_id$/
      return $1.classify.constantize.find(value)
    end
  end
  nil
end
通过@commentable重定向到post可以正常工作,但是重定向到提交的内容找不到比赛

Started POST "/submissions/36/comments" for 127.0.0.1 at 2012-11-30 18:34:41 -0800
Processing by CommentsController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"R62NH5/EE34FPapEqy7mfpa0wKz18GtSdhH8MGYq2Ec=", "comment"=>{"content"=>"test", "show"=>"true"}, "commit"=>"Create Comment", "submission_id"=>"36"}
  User Load (0.4ms)  SELECT "users".* FROM "users" WHERE "users"."id" = 2 ORDER BY users.created_at DESC LIMIT 1
  Submission Load (0.3ms)  SELECT "submissions".* FROM "submissions" WHERE "submissions"."id" = $1 ORDER BY submissions.created_at DESC LIMIT 1  [["id", "36"]]
Completed 500 Internal Server Error in 116ms

ActiveRecord::RecordNotFound (Couldn't find Contest without an ID):
  app/controllers/comments_controller.rb:19:in `create'
更改提交路线:

 submissions GET    /submissions(.:format)           submissions#index
             POST   /submissions(.:format)           submissions#create
new_submission GET    /submissions/new(.:format)       submissions#new
edit_submission GET    /submissions/:id/edit(.:format)  submissions#edit
  submission GET    /submissions/:id(.:format)       submissions#show
             PUT    /submissions/:id(.:format)       submissions#update 
             DELETE /submissions/:id(.:format)    submissions#destroy
提交表格:

<%= simple_form_for @submission, :html => { :multipart => true } do |f| %>
<div class="span7 offset2 submission">
    <fieldset class="well pleft80 edit">
      <%= f.hidden_field :contest_id , :value => params[:contest_id] %>
      <%= f.input :title %>
      <%= f.input :description %>
      <%= f.input :comment_show, :as => :hidden, :input_html => { :value => true }  %>
    </fieldset>
    <fieldset class="well pleft80 noborder">
      <%= f.fields_for :image do |img_field| %>
        <h3>Upload Photo<%= img_field.file_field :source %></h3>
      <% end %>
    </fieldset>
    <div class ="form-actions pleft80">
      <%= f.submit nil, :class => 'btn btn-primary btn-large' %>
    </div>
</div>
<% end %>
{:multipart=>true}do | f |%>
参数[:竞赛id]>
:hidden,:input_html=>{:value=>true}%>
上传照片
“btn btn主btn大”%>

您不需要实例化或分类任何内容

redirect_to @comment.commentable
如果您不能这样做,那么您需要为它构建一个全局帮助器模块,并将其包含到控制器中

module RouteHelpers

  def comment_association_redirect_to(comment)
    item = comment.commentable
    case item.class.to_s
      when 'Submission'
        redirect_to submission_path(item)
      end
  end

end
并将其包含在
应用程序控制器中

include RouteHelpers

然后你可以调用
comment\u association\u redirect\u到应用程序中的任何位置(控制器等)。

我将嵌套路由从应用程序中剥离出来,现在它工作正常,更简单。当视图必须关联依赖项时,我想不出使用嵌套路由的好理由。

你能发布
rake routes
的输出部分,其中包括
contest/commentable
的路由规范,以便我们确认Rails认为应该如何路由吗?@normalocity我添加了模型问题顶部的信息,应该澄清路由是如何生成的。好吧,你可能是对的,但是当谈到Rails如何实际解释路由时,
rake routes
才是事实,所以我宁愿看到输出。模型信息确实告诉了我这些关系,但是路由可以被覆盖、非默认,或者不是您所期望的,这就是为什么您应该检查
rake routes
,以获取此信息。可评论的路由不会显示在rake routes中,但我已经添加了来自rake路由的相关路由(在问题的底部)
@contest
变量(在重定向行中)是否设置为零?错误
找不到没有ID的竞赛
可能表示
@Contest
为零,或者未设置为您期望的值。
include RouteHelpers