Question

与课程和课程实例有关联。当我访问url / courses / 1 / course_instances / new时，我收到以下错误。

这是我得到的错误：

No route matches {:controller=>"course_instances", :course_id=>nil}

模型

课程：

class Course < ActiveRecord::Base
   attr_accessible :code, :credits, :description, :hours, :id, :name, :pass_mark
   has_many :course_instances, :dependent => :destroy
   accepts_nested_attributes_for :course_instances
end

课程实例

class CourseInstance < ActiveRecord::Base
   attr_accessible :end_date, :id, :start_date
   belongs_to :course
end

路线

Sis::Application.routes.draw do
   resources :courses do
     resources :course_instances
   end
   root :to => 'home#index'
end

课程实例控制器

class CourseInstancesController < ApplicationController

  before_filter :find_course

  def new
    @course_instance = @course.course_instances.build
    respond_to do |format|
       format.html
    end
  end

  def find_course
    @course = Course.find(params[:course_id])
  end
end

new.html.erb

<%= form_for ([@course, @course_instance]) do |f| %>
   ---- excluded for brevity ----

Rake Routes

new_course_course_instance GET    /courses/:course_id/course_instances/new(.:format)     course_instances#new

Answer 1

我不确定我做了什么，但它开始起作用了。我尝试回溯以重新创建错误但是到目前为止我没有成功。奇怪的！感谢大家的帮助！

没有路线匹配

1 个答案: