编辑#2
这是课程控制器
class CoursesController < ApplicationController
layout proc { user_signed_in? ? "dashboard" : "application" }
before_action :set_course, only: [:show, :edit, :update, :destroy]
before_action :authenticate_user!, except: [:index, :show]
before_action :authorize_admin, except: [:index, :show, :complete]
def index
@courses = Course.all.order(created_at: :asc)
end
def show
course = Course.friendly.find(params[:id])
@course_modules = course.course_modules.order(created_at: :asc)
end
def new
@course = Course.new
end
def edit
end
def create
@course = Course.new(course_params)
respond_to do |format|
if @course.save
format.html { redirect_to courses_path, notice: 'Course was successfully created.' }
format.json { render :show, status: :created, location: courses_path }
else
format.html { render :new }
format.json { render json: @course.errors, status: :unprocessable_entity }
end
end
end
def update
respond_to do |format|
if @course.update(course_params)
format.html { redirect_to @course, notice: 'Course was successfully updated.' }
format.json { render :show, status: :ok, location: @course }
else
format.html { render :edit }
format.json { render json: @course.errors, status: :unprocessable_entity }
end
end
end
def destroy
@course.destroy
respond_to do |format|
format.html { redirect_to courses_url, notice: 'Course was successfully destroyed.' }
format.json { head :no_content }
end
end
private
def set_course
@course = Course.friendly.find(params[:id])
end
def course_params
params.require(:course).permit(:title, :summary, :description, :trailer, :price)
end
end
编辑#1
因此,在Jagdeep的答案下面,我现在做了以下几点:
course.rb
class Course < ApplicationRecord
extend FriendlyId
friendly_id :title, use: :slugged
has_many :course_modules
validates :title, :summary, :description, :trailer, :price, presence: true
def complete?
self.update_attribute(:complete, true)
end
end
course_modules_user.rb
class CourseModulesUser < ApplicationRecord
belongs_to :course_module
belongs_to :user
def complete!
self.update_attribute(:complete, true)
end
end
courses_user.rb
class CoursesUser < ApplicationRecord
belongs_to :course
belongs_to :user
end
user.rb
class User < ApplicationRecord
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable, :confirmable,
:recoverable, :rememberable, :trackable, :validatable
has_one_attached :avatar
has_many :courses_users
has_many :courses, through: :courses_users
has_many :course_modules_users
has_many :course_modules, through: :course_modules_users
def mark_course_module_complete!(course_module)
self.course_modules_users
.where(course_module_id: course_module.id)
.first
.complete!
end
def after_confirmation
welcome_email
super
end
protected
def welcome_email
UserMailer.welcome_email(self).deliver
end
end
迁移
class CreateCoursesUsers < ActiveRecord::Migration[5.2]
def change
create_table :courses_users do |t|
t.integer :course_id
t.integer :user_id
t.boolean :complete
t.timestamps
end
end
end
class CreateCourseModulesUsers < ActiveRecord::Migration[5.2]
def change
create_table :course_modules_users do |t|
t.integer :course_module_id
t.integer :user_id
t.boolean :complete
t.timestamps
end
end
end
但是,我收到这样的错误
原始问题
所以这是previous question的延续,然而,这将偏离主题,所以这里是一个新的。
在此之后,我大致得到了我想要工作的东西,它允许人们标记模块并在所有模块完成后使课程完成。但是,在测试新用户时,模块和课程被标记为完成(显然,新用户不会在登录时完成课程,也不会完成任何模块)所以我需要所有用户在标记为完整和不标记的内容方面是分开的。
以前,@ engineersmnky名称的用户提到了HABTM关系,但是,我之前没有处理过这个问题。
这是我到目前为止设置的方式:
user.rb
class User < ApplicationRecord
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable, :confirmable,
:recoverable, :rememberable, :trackable, :validatable
has_one_attached :avatar
has_many :courses
def after_confirmation
welcome_email
super
end
protected
def welcome_email
UserMailer.welcome_email(self).deliver
end
end
course.rb
class Course < ApplicationRecord
extend FriendlyId
friendly_id :title, use: :slugged
has_many :users
has_many :course_modules
validates :title, :summary, :description, :trailer, :price, presence: true
def complete!
update_attribute(:complete, true)
end
end
course_module.rb
class CourseModule < ApplicationRecord
extend FriendlyId
friendly_id :title, use: :slugged
belongs_to :course
has_many :course_exercises
validates :title, :course_id, presence: true
scope :completed, -> { where(complete: true) }
after_save :update_course, if: :complete?
private
def update_course
course.complete! if course.course_modules.all?(&:complete?)
end
end
如果课程完成有条件的courses/index.html.erb
<% if course.complete? %>
<%= link_to "Completed", course, class: "block text-lg w-full text-center text-white px-4 py-2 bg-green hover:bg-green-dark border-2 border-green-dark leading-none no-underline" %>
<% else %>
<%= link_to "View Modules", course, class: "block text-lg w-full text-center text-grey-dark hover:text-darker px-4 py-2 border-2 border-grey leading-none no-underline hover:border-2 hover:border-grey-dark" %>
<% end %>
如果课程模块是完整的条件courses/show.html.erb
<% if course_module.complete? %>
<i class="fas fa-check text-green float-left mr-1"></i>
<span class="text-xs mr-2">Completed</span>
<% else %>
<%= link_to complete_course_module_path(course_module), method: :put do %>
<i class="fas fa-check text-grey-darkest float-left mr-2"></i>
<% end %>
数据库
课程模块
课程
未定义的方法完成?对于CourseModule:0x000 ..
我将专注于错误并解释它的原因。你在这里complete?
course_module
上调用<% if course_module.complete? %>
。但是你没有在complete?
模型中使用CourseModule
的方法。这就解释了错误触发的原因。
您应该在CourseModule
中定义它以避免错误
class CourseModule < ApplicationRecord
def complete?
#your logic here
end
end
注意:
如果你愿意尝试不同的方法,我会建议你去enums。 enums
是非常强大的,并提供内置的方法,非常方便。
例如,您可以使用CourseModel
将enums
更改为下方
class CourseModule < ApplicationRecord
extend FriendlyId
friendly_id :title, use: :slugged
enum status: [ :completed, :not_completed ]
belongs_to :course
has_many :course_exercises
.......
end
通过这个你可以简单地调用course_module.completed?
,它返回true
或false
基于status
的course_module
。要更新course_module
状态为completed
,请致电course_module.completed!
您需要创建新表courses_users和course_modules_users来区分不同用户的courses / course_modules。
从表课程和course_modules中删除字段complete
。我们不希望将课程/ course_module标记为全局完成。有关如何使用迁移执行此操作,请参阅this。
此外,在用户和course / course_modules之间定义has_many :through关联,如下所示:
class User < ApplicationRecord
has_many :courses_users
has_many :courses, through: :courses_users
has_many :course_modules_users
has_many :course_modules, through: :course_modules_users
end
class Course < ApplicationRecord
has_many :course_modules
end
class CoursesUser < ApplicationRecord
# Fields:
# :course_id
# :user_id
# :complete
belongs_to :course
belongs_to :user
end
class CourseModule < ApplicationRecord
belongs_to :course
end
class CourseModulesUser < ApplicationRecord
# Fields:
# :course_module_id
# :user_id
# :complete
belongs_to :course_module
belongs_to :user
end
现在,查询可以这样做:
Course.all
=> All courses
Course.find(1).course_modules
=> All course modules of a course
user = User.find(1)
course = Course.find(1)
# Assign `course` to `user`
user.courses_users.create(course_id: course.id)
user.courses
=> [course]
course_module = CourseModule.find(1)
# Assign `course_module` to `user`
user.course_modules_users.create(course_module_id: course_module.id)
user.course_modules
=> [course_module]
现在,要为用户标记完整的课程模块,请执行以下操作:
class User < ApplicationRecord
def mark_course_module_complete!(course_module)
self.course_modules_users
.where(course_module_id: course_module.id)
.first
.complete!
end
end
class CourseModulesUser < ApplicationRecord
def complete!
self.update_attribute(:complete, true)
end
end
course_module = CourseModule.find(1)
user.mark_course_module_complete!(course_module)
课程类似:
class User < ApplicationRecord
def mark_course_complete!(course)
self.courses_users
.where(course_id: course.id)
.first
.complete!
end
end
class CoursesUser < ApplicationRecord
def complete!
self.update_attribute(:complete, true)
end
end
这应该解决您在用户基础上完成的标记课程和课程模块的问题。
还有其他事情要考虑使其完全正常运行,我将留给您实施,例如当用户的所有课程模块完成时,标记用户的课程自动完成(是的,您需要再次修复),如果至少有一个课程模块未完成,则标记用户的课程不完整等。
如果再次陷入困境,那么总是开放的。