Question

在this tutorial中，我看到他们使用DELETE操作的路由助手：<%= link_to "delete", article_path(@article), method: :delete %>。但是，当我尝试使用类似的路径助手删除注释时，它不起作用：

<p><%= comment.body %><%= link_to article_comment_path(comment.id), method: :delete, data: {confirm: 'Are you sure?'} do %>
    <button type="button" class="close" aria-hidden="true">&times;</button>
<% end %></p>

为什么它不起作用？这是我运行rake routes时得到的结果。该教程说明前缀列中的名称＆＃34;滴入＆＃34;。所以带有空前缀的行从最接近的上一个前缀获得前缀。所以不是article_comment_path(<id>)正确的路线助手吗？

我得到的错误是ActionView::Template::Error (No route matches {:action=>"show", :controller=>"comments", :id=>nil, :article_id=>4, :format=>nil} missing required keys: [:id]):，因此它尝试转到show操作而不是destroy操作。

~/practice/blog >>  rake routes
              Prefix Verb   URI Pattern                                       Controller#Action
                root GET    /                                                 articles#index
    article_comments GET    /articles/:article_id/comments(.:format)          comments#index
                     POST   /articles/:article_id/comments(.:format)          comments#create
 new_article_comment GET    /articles/:article_id/comments/new(.:format)      comments#new
edit_article_comment GET    /articles/:article_id/comments/:id/edit(.:format) comments#edit
     article_comment GET    /articles/:article_id/comments/:id(.:format)      comments#show
                     PATCH  /articles/:article_id/comments/:id(.:format)      comments#update
                     PUT    /articles/:article_id/comments/:id(.:format)      comments#update
                     DELETE /articles/:article_id/comments/:id(.:format)      comments#destroy
            articles GET    /articles(.:format)                               articles#index
                     POST   /articles(.:format)                               articles#create
         new_article GET    /articles/new(.:format)                           articles#new
        edit_article GET    /articles/:id/edit(.:format)                      articles#edit
             article GET    /articles/:id(.:format)                           articles#show
                     PATCH  /articles/:id(.:format)                           articles#update
                     PUT    /articles/:id(.:format)                           articles#update
                     DELETE /articles/:id(.:format)                           articles#destroy

Answer 1

删除嵌套资源时，必须同时指定两个资源ID。在您的代码中，将article.id添加到article_comment_path

您的观看代码应该看起来像：

<p><%= comment.body %><%= link_to article_comment_path(article.id, comment.id), method: :delete, data: {confirm: 'Are you sure?'} do %>
    <button type="button" class="close" aria-hidden="true">&times;</button>
<% end %></p>

Rails：DELETE操作的路由助手问题

1 个答案: