创建删除活动记录的按钮时出错

Question

删除我的工人模型的活动记录时遇到问题。

Workers 与 Users 具有belongs_to 关系

我的路线

workers_update PUT    /workers/update(.:format)                  workers#update
user_workers POST   /users/:user_id/workers(.:format)          workers#create
new_user_worker GET    /users/:user_id/workers/new(.:format)      workers#new
edit_user_worker GET    /users/:user_id/workers/:id/edit(.:format) workers#edit
user_worker GET    /users/:user_id/workers/:id(.:format)      workers#show
             DELETE /users/:user_id/workers/:id(.:format)      workers#destroy

我的工作控制器销毁方法

    def destroy
     @worker.destroy
     redirect_to(current_user) 
   end

我正在尝试创建的按钮位于工作人员显示页面上

<% if current_user?(@worker.user) %>
   <%= button_to "Delete", @worker, method: :delete, data: {confirm: "Are you sure you  want to delete this worker?"}%>
<%end%>

我尝试加载页面时遇到的错误

 NoMethodError in Workers#show

 Showing /home/elliot/rails_projects/EJWmining_app/mining_app/app/views/workers/show.html.erb where line #10 raised:

 undefined method `worker_path' for #<#<Class:0x00000002b841e0>:0x00000003e5e338>

 Extracted source (around line #10):

 9: <% if current_user?(@worker.user) %>
 10:     <%= button_to "Delete", @worker, method: :delete, data: {confirm: "Are you sure you want to delete this worker?"}%>
 11: <%end%>

不知道为什么我会收到此错误。它说Workers#show中没有方法错误，它应该调用Workers#destroy。奖励积分我们可以将我的引导按钮类添加到此按钮

class: "btn btn-small bit-danger"

Answer 1

发生这种情况的原因是，当您在 url_to（在 link_to 或 button_to 等内部）将处理的某个地方使用像 @worker 这样的实例变量时，它将假定基于类名的路由。

在这种情况下，您的班级是Worker。由于@worker 是Worker，它正在尝试使用worker_path，但您实际上并没有定义该路由。对于一个简单的资源，路由如下所示：

new_worker   GET   /workers/new(.:format)       workers#new
edit_worker  GET  /workers/:id/edit(.:format)   workers#edit
worker       GET  /workers/:id(.:format)        workers#show
             PUT    /workers/:id(.:format)      workers#update
             DELETE  /workers/:id(.:format)     workers#destroy

因此，worker_path 上的 DELETE 将是您想要的。但是，由于您有一些更复杂的路线，您实际上想要user_worker_path。

你可以这样使用：

<%= button_to "Delete", user_worker_path(@user, @worker), method: :delete, ... %>

更多信息：

• Nested Resources
• Deleting a nested resource

要添加类，您可以直接将其包含在button_to 代码中：

<%= button_to "Delete", path_method, method: 'delete', class: 'myclass' %>

希望这会有所帮助！