调整

app/controllers/weapps/courses_controller.rb

@@ -1,6 +1,6 @@
 class Weapps::CoursesController < Weapps::BaseController
   before_action :require_login
-  before_action :user_course_identity, except: [:create]
+  before_action :set_course, :user_course_identity, except: [:create]
   before_action :teacher_allowed, only: [:edit, :update]
   before_action :teacher_or_admin_allowed, only: [:change_member_roles, :delete_course_teachers]
 
@@ -167,4 +167,9 @@ class Weapps::CoursesController < Weapps::BaseController
       tip_exception(403, "..")
     end
   end
+
+  def set_course
+    @course = Course.find_by!(id: params[:id])
+    tip_exception(404, "") if @course.is_delete == 1 && !current_user.admin?
+  end
 end