Question

student_classes_controller.rb

class StudentClassesController < ApplicationController
    before_filter :set_batch
    def index
        @sections = StudentClass.all
    end
    def show
        @section = StudentClass.find(params[:id])
    end

     private
  def set_batch
    @batch = Batch.find(params[:batch_id])
  end
end

在student_classes / index.html.erb

视图中

 <table class="table table-bordered table-hover">
    <thead bgcolor="#B7B7B7">
      <th>Section</th>
      <th>Number of Students</th>
      <th>Details</th>
    </thead>
    <% @sections.each do |section| %>
    <tr>
      <td><%= section.name %></td>
      <td><%= section.students.count %></td>
      <td><%= link_to 'View Details', batch_student_classes_path(@batch , section) %></td>
    </tr>
    <% end %>
  </table>

查看详细信息的网址是http://localhost:3000/batches/1/student_classes.1 但我想把它作为http://localhost:3000/batches/1/student_classes/1

的routes.rb

resources :batches do
    resources :student_classes
  end

rake routes

   batch_student_classes GET    /batches/:batch_id/student_classes(.:format)              student_classes#index
                         POST   /batches/:batch_id/student_classes(.:format)              student_classes#create
 new_batch_student_class GET    /batches/:batch_id/student_classes/new(.:format)          student_classes#new
edit_batch_student_class GET    /batches/:batch_id/student_classes/:id/edit(.:format)     student_classes#edit
     batch_student_class GET    /batches/:batch_id/student_classes/:id(.:format)          student_classes#show
                         PUT    /batches/:batch_id/student_classes/:id(.:format)          student_classes#update
                         DELETE /batches/:batch_id/student_classes/:id(.:format)          student_classes#destroy

Answer 1

您要调用的路径方法是batch_student_class_path而不是 batch_student_class * es * _ path 。

无法去显示动作嵌套资源

1 个答案: