ActionController::UnknownFormat (ActionController::UnknownFormat): 销毁

Question

我正在尝试销毁记录，我有 3 个用于列出记录的菜单。 所以在销毁记录后，它应该重定向到我单击销毁方法的同一菜单。

但是当我尝试它时，我得到了这个错误。

 ActionController::UnknownFormat (ActionController::UnknownFormat): app/controllers/my_controller.rb:56:in `destroy'

删除链接

 <a href="<%=my_path(data,:page_name=>params[:action])%>" class="btn"" data-placement="bottom" title="Delete" data-method="delete" data-confirm="Are you sure?">
  <i class="fa fa-trash-o" aria-hidden="true"></i>
 </a>

销毁方法

 def destroy
   @page.destroy
   respond_to do |format|
     if params[:page_name] == "first"
       format.html { redirect_to first_home_index_path, notice: 'Url was successfully destroyed.' }
     elsif  params[:page_name] == "second"
       format.html { redirect_to second_home_index_path, notice: 'Url was successfully destroyed.' }
     elsif  params[:page_name] == "third"
       format.html { redirect_to third_home_index_path, notice: 'Url was successfully destroyed.' }
     end
     format.json { head :no_content }
   end
 end

Answer 1

在respond_to中添加条件应该发生在format块内部，而不是外部。

 def destroy
  @page.destroy
  respond_to do |format|
   format.html do 
     if params[:page_name] == "first"
       redirect_to first_home_index_path, notice: 'Url was successfully destroyed.'
     elsif ....
     end
   end
   format.json { head :no_content }
 end
end