init project

app/models/course_message.rb

@@ -0,0 +1,45 @@
+class CourseMessage < ApplicationRecord
+  enum status: { UNHANDLED: 0, PASSED: 1, REJECTED: 2 }
+  belongs_to :course
+  belongs_to :user
+  has_one :course_act, class_name: 'CourseActivity', as: :course_act, dependent: :destroy
+
+  scope :find_by_course, ->(course) { where(course_id: course.id) }
+  scope :join_course_requests, -> { where(course_message_type: "JoinCourseRequest") }
+  scope :unhandled, -> { where(status: :UNHANDLED) }
+
+  scope :unhandled_join_course_requests_by_course, ->(course) { find_by_course(course).join_course_requests.unhandled }
+
+  after_create :act_as_course_activity
+
+  def pass!
+    update!(status: :PASSED)
+    send_deal_tiding(1)
+  end
+
+  def application_user
+    User.find_by(id: course_message_id)
+  end
+
+  def reject!
+    update!(status: :REJECTED)
+    send_deal_tiding(2)
+  end
+
+  private
+
+  #课程动态公共表记录
+  def act_as_course_activity
+    self.course_act << CourseActivity.new(user_id: course_message_id, course_id: course_id)
+  end
+
+  def send_deal_tiding deal_status
+    # 发送申请处理结果消息
+    Tiding.create!(
+      user_id: course_message_id, trigger_user_id: 0, container_id: course_id, container_type: 'DealCourse',
+      belong_container: course, extra: content.to_i == 2 ? '9' : '7', tiding_type: 'System', status: deal_status
+    )
+    # 将申请消息置为已处理
+    Tiding.where(trigger_user_id: course_message_id, container_id: course_id, container_type: 'JoinCourse', status: 0).update_all(status: 1)
+  end
+end