pgfqe6ch8/app/models/course_member.rb

class CourseMember < ActiveRecord::Base
  # attr_accessible :title, :body

  belongs_to :course, counter_cache: true
  belongs_to :user
  belongs_to :course_group, counter_cache: true

  after_create :create_student_works, :create_exercise_users, :create_poll_users, :create_graduation_works

  #加入班级时创建作业的作品
  def create_student_works
    if role == 4
      course = self.course
      str = ""
      homeworks = course.homework_commons.includes(:homework_detail_manual).where("homework_type in (1, 3, 4)")
      if homeworks.count != 0
        homeworks.each do |hw|
          str += "," if str != ""
          str += "('#{hw.name}的作品提交',#{hw.id},#{user_id}, '#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}', '#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}')"
        end
        if str != ""
          sql = "insert into student_works (name, homework_common_id, user_id, created_at, updated_at) values" + str
          ActiveRecord::Base.connection.execute sql
        end
      end
    end
  end

  # 加入班级时创建已发布试卷的作品
  def create_exercise_users
    if role == 4
      course = self.course
      str = ""
      exercises = course.exercises
      if exercises.count != 0
        exercises.each do |ex|
          str += "," if str != ""
          str += "(#{ex.id},#{user_id}, 0, '#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}', '#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}')"
        end
        if str != ""
          sql = "insert into exercise_users (exercise_id, user_id, commit_status, created_at, updated_at) values" + str
          ActiveRecord::Base.connection.execute sql
        end
      end
    end
  end

  # 加入班级时创建已发布问卷的作品
  def create_poll_users
    if role == 4
      course = self.course
      str = ""
      polls = course.polls
      if polls.count != 0
        polls.each do |poll|
          str += "," if str != ""
          str += "(#{poll.id},#{user_id}, 0, '#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}', '#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}')"
        end
        if str != ""
          sql = "insert into poll_users (poll_id, user_id, commit_status, created_at, updated_at) values" + str
          ActiveRecord::Base.connection.execute sql
        end
      end
    end
  end

  # 创建毕设任务作品
  def create_graduation_works
    if role == 4
      course = self.course
      str = ""
      tasks = course.graduation_tasks
      if tasks.count != 0
        tasks.each do |task|
          str += "," if str != ""
          str += "(#{task.id}, #{user_id}, #{course.id}, '#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}', '#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}')"
        end
        if str != ""
          sql = "insert into graduation_works (graduation_task_id, user_id, course_id, created_at, updated_at) values" + str
          ActiveRecord::Base.connection.execute sql
        end
      end
    end
  end
end