Redirect_to rails 4 - 无法通过讲座 ID 找到

Question

我的模型

  class Course
       has_many :lessons, through: :chapters
end

class Lesson
  belongs_to :chapter
  has_one :course, through: :chapter
end

class User
  has_many :user_lessons
end

class UserLesson
   #fields: user_id, lesson_id, completed(boolean)  
   belongs_to :user
   belongs_to :lesson
end

class Chapter 
   has_many :lessons
   belongs_to :course
end 

我的 UserLesson 控制器：

 class UserLessonsController < ApplicationController
   before_filter :set_user_and_lesson
   def create
     @user_lesson = UserLession.create(user_id: @user.id, lession_id:    @lesson.id, completed: true)
if @user_lesson.save
  # redirect_to Course show action///// How can I redirect to that?
else
  # take the appropriate action
end
  end
 end

基本上我想要的是重定向到有课程的课程的表演动作？ （基本上是回到整个课程列表。课程嵌套在课程中）问题是找不到讲座ID。

No route matches {:action=>"show", :controller=>"lectures", :id=>nil}    missing required keys: [:id]

Routes.rb

  resources :courses do 

      resources :lessons

  end

   resources :user_lessons

发送数据到创建方法的链接

   <%= link_to 'Back to Lesson list', user_lessons_path(@user_lesson, user_lesson: {user_id: 'current_user.id', lesson_id: 'lesson.id'}), :method => :post, data: {confirm: 'are you sure?'} %>

Answer 1

redirect_to lessons_path(@user_lesson)

但您应该在 UserLessons 控制器中定义显示操作。

Answer 2

我会这样做： 修改课目

class Lesson
  belongs_to :chapter
  has_one :course, through: :chapter #changed from :lecture since it's nowhere in your model structure
end

那么你可以使用

redirect_to @lesson.course

重定向到课程的课程

希望我做对了 :)

编辑：我看到您在多个场合提到过讲座，但在您提供的内容中找不到它......所以我假设它现在是 Course ？ :)

如果是这样的话……也改一下

class Chapter 
  has_many :lessons
  belongs_to :course # was lecture
end 

Answer 3

在您的redirect_to 方法中传递id：

redirect_to :controller=>'courses', :action => 'show', :id => @user_lesson.lesson.course.id

问题编辑后更新：

改变这个：

   <%= link_to 'Back to Lesson list', user_lessons_path(@user_lesson, user_lesson: {user_id: 'current_user.id', lesson_id: 'lesson.id'}), :method => :post, data: {confirm: 'are you sure?'} %>

到：

   <%= link_to 'Back to Lesson list', user_lessons_path(@user_lesson, user_lesson: {user_id: current_user.id, lesson_id: lesson.id}), :method => :post, data: {confirm: 'are you sure?'} %>

这基本上改变了这一点：

user_lesson: {user_id: 'current_user.id', lesson_id: 'lesson.id'}

到：

user_lesson: {user_id: current_user.id, lesson_id: lesson.id}

看看有没有用。