删除课堂时将课堂相关消息置为删除状态

app/controllers/courses_controller.rb

@@ -386,6 +386,7 @@ class CoursesController < ApplicationController
   def destroy
     if @course.is_delete == 0
       @course.delete!
+      Tiding.where(belong_container: @course).update_all(delete: 1)
       Tiding.create!(user_id: current_user.id, trigger_user_id: current_user.id, container_id: @course.id,
                      container_type: 'DeleteCourse', tiding_type: 'System', belong_container: @course, extra: @course.name)
       normal_status(0, "成功")

app/controllers/tidings_controller.rb

@@ -5,7 +5,7 @@ class TidingsController < ApplicationController
   after_action :update_onclick_time!, only: [:index]
 
   def index
-    tidings = current_user.tidings
+    tidings = current_user.tidings.visible
     @onclick_time = current_user.click_time
 
     tiding_types =
@@ -21,7 +21,7 @@ class TidingsController < ApplicationController
 
     tidings = tidings.where(container_type: 'JoinCourse', status: 0) if params[:type] == 'course_apply'
     # @course_apply_count = tidings.where("created_at > '#{@onclick_time}'").where(container_type: 'JoinCourse', status: 0).count
-    @course_apply_count = tidings.where("created_at > '#{@onclick_time}'").where(container_type: 'JoinCourse', status: 0).count
+    @course_apply_count = tidings.where(container_type: 'JoinCourse', status: 0).count
 
     tidings = tidings.where(container_type: 'ProjectPackage') if params[:type] == 'project_package'
 

app/models/tiding.rb

@@ -7,6 +7,8 @@ class Tiding < ApplicationRecord
 
   has_many :attachments, as: :container
 
+  scope :visible, -> { where.not(delete: 0) }
+
   def identifier
     value = nil
 

db/migrate/20200210105238_add_delete_to_tiding.rb

@@ -0,0 +1,5 @@
+class AddDeleteToTiding < ActiveRecord::Migration[5.2]
+  def change
+    add_column :tidings, :delete, :boolean, default: 0
+  end
+end

db/migrate/20200210105323_update_tiding_delete_status.rb

@@ -0,0 +1,5 @@
+class UpdateTidingDeleteStatus < ActiveRecord::Migration[5.2]
+  def change
+    Tiding.where.not(container_type: 'DeleteCourse').where(belong_container_type: "Course", belong_container_id: Course.where(is_delete: 1).pluck(:id)).update_all(delete: 1)
+  end
+end