diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index 6c2eb5299..d49e28d80 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -911,6 +911,7 @@ class CoursesController < ApplicationController
             CourseAddStudentCreateWorksJob.perform_later(course.id, [current_user.id])
             StudentJoinCourseNotifyJob.perform_later(current_user.id, course.id)
           end
+          student_role = 1
         end
 
         # 创建教师身份
@@ -940,9 +941,9 @@ class CoursesController < ApplicationController
           teacher_role = 1
         end
 
-        if teacher_role && current_user.student_of_course?(course)
+        if teacher_role && student_role
           render json: { status: 0, message: message, course_id: course.id}
-        elsif current_user.student_of_course?(course)
+        elsif student_role
           render json: { status: 0, message: "加入成功", course_id: course.id}
         else
           normal_status(message)
diff --git a/app/models/shixun.rb b/app/models/shixun.rb
index 82f689e3f..61d15de55 100644
--- a/app/models/shixun.rb
+++ b/app/models/shixun.rb
@@ -38,6 +38,7 @@ class Shixun < ApplicationRecord
   belongs_to :user
   # 实训服务配置
   has_many :shixun_service_configs, :dependent => :destroy
+  has_many :tidings, as: :container, dependent: :destroy
 
 	scope :search_by_name, ->(keyword) { where("name like ? or description like ? ",
 				"%#{keyword}%", "%#{keyword}%") }
@@ -62,6 +63,8 @@ class Shixun < ApplicationRecord
   scope :field_for_recommend, lambda{ select([:id, :name, :identifier, :myshixuns_count]) }
   scope :find_by_ids,lambda{|k| where(id:k)}
 
+  after_create :send_tiding
+
   # REDO: 
   def propaedeutics
     shixun_info.try(:propaedeutics)
@@ -242,4 +245,11 @@ class Shixun < ApplicationRecord
   def finished_challenges_count(user)
     Game.joins(:myshixun).where(user_id: user.id, status: 2, myshixuns: { shixun_id: id }).count
   end
+
+  private
+
+  def send_tiding
+    self.tidings << Tiding.new(:user_id => user_id, :trigger_user_id => 1, :belong_container_id => id, :belong_container_type =>'Shixun', :tiding_type => "System", :viewed => 0)
+  end
+
 end