init project

app/models/course_member.rb

@@ -0,0 +1,159 @@
+class CourseMember < ApplicationRecord
+  # role 1：创建者 2：老师  3：助教  4：学生
+  enum role: { CREATOR: 1, PROFESSOR: 2, ASSISTANT_PROFESSOR: 3, STUDENT: 4 }
+  # is_active: true:当前活跃身份（多重身份的用户）
+
+  belongs_to :course, counter_cache: true
+  belongs_to :user
+  belongs_to :course_group, counter_cache: true, optional: true
+  belongs_to :graduation_group, optional: true
+  has_many :teacher_course_groups, dependent: :destroy
+
+  scope :teachers_and_admin, -> { where(role: %i[CREATOR PROFESSOR ASSISTANT_PROFESSOR]) }
+  scope :students, ->(course) { where(course_id: course.id, role: %i[STUDENT])}
+  scope :course_find_by_ids, lambda { |k,ids| where("#{k}": ids)}
+  scope :course_students, -> {where(role: %i[STUDENT])}
+
+  #用户的身份查询
+  scope :course_user_role, lambda { |k| where(role: k)}
+
+  # 未分班
+  scope :ungroup_students, -> { where(course_group_id: 0, role: 4) }
+
+  # after_destroy :delete_works
+  # after_create :work_operation
+  def delete_works
+    if self.role == "STUDENT"
+      course = self.course
+      student_works = StudentWork.joins(:homework_common).where(user_id: self.user_id, homework_commons: {course_id: course.id})
+      student_works.update_all(is_delete: 1)
+
+      exercise_users = ExerciseUser.joins(:exercise).where(user_id: self.user_id, exercises: {course_id: course.id})
+      exercise_users.update_all(is_delete: 1)
+
+      poll_users = PollUser.joins(:poll).where(user_id: self.user_id, polls: {course_id: course.id})
+      poll_users.update_all(is_delete: 1)
+
+      course.graduation_works.where(user_id: self.user_id).update_all(is_delete: 1)
+    end
+  end
+
+  def work_operation
+    if self.role == "STUDENT"
+      recover_works
+      create_exercise_users
+      create_graduation_works
+      create_poll_users
+      create_student_works
+    end
+  end
+
+  # 加入班级时还原作品(如果有已删除作品的话)
+  def recover_works
+    course = self.course
+
+    student_works = StudentWork.joins(:homework_common).where(user_id: self.user_id, homework_commons: {course_id: course.id})
+    student_works.update_all(is_delete: 0)
+
+    exercise_users = ExerciseUser.joins(:exercise).where(user_id: self.user_id, exercises: {course_id: course.id})
+    exercise_users.update_all(is_delete: 0)
+
+    poll_users = PollUser.joins(:poll).where(user_id: self.user_id, polls: {course_id: course.id})
+    poll_users.update_all(is_delete: 0)
+
+    graduation_works = course.graduation_works.where(user_id: self.user_id)
+    graduation_works.update_all(is_delete: 0)
+  end
+
+  # 加入班级时创建作业的作品(如果没有作品才创建)
+  def create_student_works
+    course = self.course
+
+    homework_commons = course.homework_commons.where(homework_type: %i[normal group practice])
+    str = ""
+    homework_commons.each do |homework|
+      next if homework.student_works.where(user_id: self.user_id).any?
+      str += "," if str != ""
+      str += "(#{homework.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 (homework_common_id, user_id, created_at, updated_at) values" + str
+      ActiveRecord::Base.connection.execute sql
+    end
+  end
+
+  # 加入班级时创建已发布试卷的作品(如果没有作品才创建)
+  def create_exercise_users
+    course = self.course
+    exercises = course.exercises
+
+    str = ""
+    exercises.each do |exercise|
+      next if exercise.exercise_users.where(user_id: self.user_id).any?
+      str += "," if str != ""
+      str += "(#{user_id}, #{exercise.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 (user_id, exercise_id, commit_status, created_at, updated_at) values" + str
+      ActiveRecord::Base.connection.execute sql
+    end
+  end
+
+  # 加入班级时创建已发布问卷的作品(如果没有作品才创建)
+  def create_poll_users
+    course = self.course
+    polls = course.polls
+
+    str = ""
+    polls.each do |poll|
+      next if poll.poll_users.where(user_id: self.user_id).any?
+      str += "," if str != ""
+      str += "(#{user_id}, #{poll.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 (user_id, poll_id, commit_status, created_at, updated_at) values" + str
+      ActiveRecord::Base.connection.execute sql
+    end
+  end
+
+  # 创建毕设任务作品(如果没有作品才创建)
+  def create_graduation_works
+    course = self.course
+    tasks = course.graduation_tasks
+
+    str = ""
+    tasks.each do |task|
+      next if task.graduation_works.where(user_id: self.user_id).any?
+      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
+
+  # 分班名称
+  def course_group_name
+    self.course_group_id == 0 ? "未分班" : course_group.try(:name)
+  end
+
+  # 学生的分班老师
+  def member_teachers
+    teacher_groups = course.teacher_course_groups
+    if teacher_groups.count > 0
+      member_ids = teacher_groups.where(course_group_id: self.try(:course_group_id)).pluck(:course_member_id).compact
+
+      none_group_teachers = teacher_groups.pluck(:course_member_id).compact.size > 0 ? teacher_groups.pluck(:course_member_id).compact.join(',') : -1
+      teachers = course.teachers.where("course_members.id not in (#{none_group_teachers}) or
+                                            course_members.id in (#{member_ids.size > 0 ? member_ids.join(',') : -1})")
+    else
+      teachers = course.teachers
+    end
+    teachers
+  end
+end