Question

所以我在这里有三个功能级别，课程，课程模块和课程练习。

但是，我想实现一些功能，使用户可以在课程完成时在课程模块上打勾，我以前确实有过这项工作，但是，这标志着所有用户的模块均已完成，而并非我想要的结果。

因此，我尝试了以下操作，在这里我建立了两个新表，一个用于courses_users和course_modules_users，以便我可以捕获课程用户并添加一条记录，以捕获用户ID，课程ID ，模块ID等，因此对于该用户来说是完全唯一的（因此，并不是所有用户都一样）

以下是与课程，课程模块和练习有关的架构：

ActiveRecord::Schema.define(version: 2018_09_12_115008) do

  # These are extensions that must be enabled in order to support this database
  enable_extension "plpgsql"

  create_table "course_exercises", force: :cascade do |t|
    t.string "title"
    t.text "description"
    t.string "video"
    t.integer "course_module_id"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.string "slug"
    t.index ["course_module_id"], name: "index_course_exercises_on_course_module_id"
    t.index ["slug"], name: "index_course_exercises_on_slug", unique: true
  end

  create_table "course_modules", force: :cascade do |t|
    t.string "title"
    t.integer "course_id"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.string "slug"
    t.index ["course_id"], name: "index_course_modules_on_course_id"
    t.index ["slug"], name: "index_course_modules_on_slug", unique: true
  end

  create_table "course_modules_users", force: :cascade do |t|
    t.integer "course_module_id"
    t.integer "user_id"
    t.boolean "complete"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.index ["course_module_id"], name: "index_course_modules_users_on_course_module_id"
    t.index ["user_id"], name: "index_course_modules_users_on_user_id"
  end

  create_table "courses", force: :cascade do |t|
    t.string "title"
    t.text "summary"
    t.text "description"
    t.string "trailer"
    t.integer "price"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.string "slug"
    t.index ["slug"], name: "index_courses_on_slug", unique: true
  end

  create_table "courses_users", force: :cascade do |t|
    t.integer "course_id"
    t.integer "user_id"
    t.boolean "complete"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.index ["course_id"], name: "index_courses_users_on_course_id"
    t.index ["user_id"], name: "index_courses_users_on_user_id"
  end
end

这是新表的外观：

对于模型，我已执行以下操作：

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?
  end
end

course_exercise.rb

class CourseExercise < ApplicationRecord
  extend FriendlyId
  friendly_id :title, use: :slugged

  belongs_to :course_module

  validates :title, :description, :video, :course_module_id, presence: true
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?

  def complete?
  end

  private

  def update_course
    course.complete! if course.course_modules.all?(&:complete?)
  end
end

course_modules_user.rb

class CourseModulesUser < ApplicationRecord
  belongs_to :course_module
  belongs_to :user
end

courses_user.rb

class CoursesUser < ApplicationRecord
  belongs_to :course
  belongs_to :user
end

对于控制器，我已执行以下操作：

courses / show.html.erb

<% if user_signed_in? %>
  <section class="pt-4 px-8">
    <section class="flex flex-wrap justify-between">
      <h3 class="font-normal text-grey-dark mb-4 py-2">
        <% if current_user.isAdmin? %>
          <%= @course.title %>
        <% else %>
          <%= @course.title %> Modules
        <% end %>
      </h3>
      <%= render 'layouts/dashboard/account' %>
    </section>
  </section>

  <section class="px-8">
    <% if Order.exists?(user_id: current_user.id, course_id: @course.id) %>
      <% @course_modules.each do |course_module| %>
        <section class="accordion-toggle">
          <section class="w-full sm:pr-4 pb-4">
            <section class="rounded shadow bg-grey-lighter border-b">
              <section class="flex justify-between px-6 p-4">
                <section class="flex items-center px-6 text-grey-darker">
                  <section class="font-bold text-base">
                    <%= course_module.title %>
                  </section>
                </section>

                <section class="flex items-center">
                  <% if user_signed_in? %>
                    <% if current_user.isAdmin? %>
                      <%= link_to "Edit", edit_course_module_path(course_module), class: "text-base 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" %>
                    <% else %>
                      <% 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 %>
                      <% end %>
                      <i class="flex items-center fal fa-angle-up"></i>
                    <% end %>
                  <% end %>
                </section>
              </section>
            </section>

            <section class="accordion-items hidden">
              <% course_module.course_exercises.each do |exercise| %>
                <section class="w-full">
                  <section class="rounded shadow bg-grey-lighter border-b">
                    <section class="flex justify-between px-6 p-4">
                      <section class="flex items-center px-6 text-grey-darker">
                        <section class="font-bold text-base pl-4">
                          - <%= exercise.title %>
                        </section>
                      </section>

                      <section>
                        <% if user_signed_in? %>
                          <% if current_user.isAdmin? %>
                            <%= link_to "Edit", edit_course_exercise_path(exercise), class: "text-base 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" %>
                          <% else %>
                            <%= link_to "View Exercise", exercise, class: "text-base 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 %>
                        <% end %>
                      </section>
                    </section>
                  </section>
                </section>
              <% end %>
            </section>
          </section>
        </section>
      <% end %>
    <% else %>
      <h3>You have not bought this course!</h3>

      <%= form_with(url: '/payments/create') do |f| %>
        <%= render partial: "stripe_checkout_button" %>
        <%= hidden_field_tag(:course_id, @course.id) %>

        <%= f.submit "Buy this course", class: "bg-blue hover:bg-blue-dark text-white font-semibold py-3 px-4 border-2 rounded-sm border-blue-dark shadow outline-none" %>
      <% end %>
  <% end %>
  </section>
<% else %>
  <section class="flex h-64 hero-banner p-4">
    <section class="flex items-center mx-auto">
      <h2 class="uppercase">
        <%= @course.title %>
      </h2>
    </section>
  </section>

  <section class="pt-4 px-4">
    <section class="w-full">
      <section class="rounded overflow-hidden shadow">
        <section style="padding: 56.25% 0 0 0; position: relative;">
          <iframe src="https://player.vimeo.com/video/<%= @course.trailer %>" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%;" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>
        </section>
      </section>
    </section>

    <section class="flex flex-wrap -mx-4">
      <section class="w-full lg:w-3/4 p-4">
        <section class="bg-grey-lightest shadow text-grey-darker p-4">
          <h2 class="font-normal mb-4">Course description</h2>
          <p class="font-normal whitespace-pre-wrap"><%= @course.description %></p>
        </section>
      </section>
      <section class="w-full lg:w-1/4 p-4">
        <section class="bg-grey-lightest shadow text-grey-darker p-4 mb-4">
          <h3 class="font-normal mb-4">Course Price</h3>
          <p class="font-bold text-3xl text-green">£<%= @course.price %></p>
        </section>

        <%= link_to "Sign up to purchase", new_user_registration_path, class: "bg-blue hover:bg-blue-dark text-white font-semibold py-3 px-4 border-2 rounded-sm border-blue-dark shadow outline-none no-underline" %>

        <section class="bg-grey-lightest shadow text-grey-darker py-4 px-4 mt-4">
          <h3 class="font-normal mb-4">Course Modules</h3>
            <% @course_modules.each do |course_module| %>
              <section class="py-2 border-b-2 border-light modules">
                <%= course_module.title %>
              </section>
          <% end %>
        </section>
      </section>
    </section>
  </section>
<% end %>

看看我是否知道模块是否完整，应该显示一个绿色的勾号，并且理想情况下，记录应该进入course_modules_users表中，因为完成的字段应该将课程模块标记为{{ 1}}。

模型中的某些代码来自先前为所有用户标记课程模块的解决方案。

因此，如果我的想法正确，我只需要将当前功能移至新的true方法中，并将数据捕获到新的数据库表中

但是，这对我来说是新事物，对任何知道如何进行此操作的帮助将非常感激。

单击时，每个用户的Rails 5完整课程和模块

0 个答案: