ruby-on-rails - 显示 "no route matches"用于删除链接 rails 4

Question

我是使用 rails 4 的 ruby​​ 新手。错误出现在删除操作的链接中。错误是:

ActionController::UrlGenerationError in Subjects#index No route matches {:action=>"delete", :controller=>"subjects", :id=>1}

我认为问题在于路由。我的 list.html.erb 代码是:

<div class="subject list">
    <h2>Subjects</h2>
    <%= link_to("Add New Subject", {:action => 'new'}, :class => 'action new') %>
    <table class="listing" summary="Subject list">
        <tr>
            <th>Position</th>
            <th>Subject</th>
            <th>Visible</th>
            <th>Pages</th>
            <th>Actions</th>
        </tr>
        <% @subjects.each do |subject| %>
        <tr>
            <td><%= subject.position %></td>
            <td><%= subject.name %></td>
            <td class="center"><%= subject.visible ? 'Yes' : 'No' %></td>
            <td class="center"><%= subject.pages.size %></td>
            <td class="actions">
                <%= link_to("Show",{:action => 'show', :id => subject.id}, :class => 'action show') %>
                <%= link_to("Edit",{:action => 'edit', :id => subject.id}, :class => 'action edit') %>
            <!--error is showing in this line-->    <%= link_to("Delete",{:action => 'delete', :id => subject.id}) %> 

            </td>
        </tr>
        <% end %>
    </table>
</div>

路线代码是 -

resources :subjects

由于我的路由不成熟，除了删除和销毁之外，列表、显示、编辑、更新的所有操作都可以正常工作。建议会有所帮助。

---

我已经更改了路由文件:

 get 'subjects/index'
  get 'subjects/list'
  get 'subjects/new'
  get 'subjects/edit'
  get 'subjects/delete'
  get 'subjects/destroy'
  resources :subjects do
    member do
      get 'show', to: 'show#id'
    end
  end

现在如果我像这样通过 URL 手动调用删除

http://localhost:3000/subjects/delete?id=8

然后模板正在加载。

现在如果我像这样通过 URL 手动调用销毁

http://localhost:3000/subjects/destroy?id=8

即使这样，数据也会从数据库中销毁

但我的 list.html.erb 中的链接

<%= link_to 'Delete', subject, method: :delete %>

正在调用导致此 url 的显示操作

http://localhost:3000/subjects/1/show
 and the error occurs :


No route matches [DELETE] "/subjects/1/show"

Rails.root: D:/ruby/sam_app

Application Trace | Framework Trace | Full Trace
Routes

Routes match in priority from top to bottom

Helper  HTTP Verb   Path    Controller#Action
Path / Url          
subjects_index_path GET /subjects/index(.:format)   subjects#index
subjects_list_path  GET /subjects/list(.:format)    subjects#list
subjects_new_path   GET /subjects/new(.:format) subjects#new
subjects_edit_path  GET /subjects/edit(.:format)    subjects#edit
subjects_delete_path    GET /subjects/delete(.:format)  subjects#delete
subjects_destroy_path   GET /subjects/destroy(.:format) subjects#destroy
subject_path    GET /subjects/:id/show(.:format)    show#id
subjects_path   GET /subjects(.:format) subjects#index
POST    /subjects(.:format) subjects#create
new_subject_path    GET /subjects/new(.:format) subjects#new
edit_subject_path   GET /subjects/:id/edit(.:format)    subjects#edit
GET /subjects/:id(.:format) subjects#show
PATCH   /subjects/:id(.:format) subjects#update
PUT /subjects/:id(.:format) subjects#update
DELETE  /subjects/:id(.:format) subjects#destroy

delete.html.erb 中的销毁按钮也是如此

现在我被困住了。

Answer 1

这个问题很老，但还没有选择的答案，所以我会给我 2 美分。

这个:

get 'subjects/index'
get 'subjects/list'
get 'subjects/new'
get 'subjects/edit'
get 'subjects/delete'
get 'subjects/destroy'
resources :subjects do
  member do
    get 'show', to: 'show#id'
  end
end

将使用 GET 请求(如果您在浏览器的地址栏上键入它)，因为 rails 路由具有“首次出现优先级”，如您的日志中所示 Routes match优先级从上到下，这意味着您正在创建一个 GET destroy 路由和 resources :subjects 创建的 DELETE destroy 是忽略。

我建议您摆脱那些 get 'subjects/*' 并使用以下代码作为您的删除按钮:

<%= link_to 'Delete', subject_path(subject), method: :delete %>

并使用 Controller 上的 destroy 方法来执行您的操作。