实践课程删除实训

app/controllers/admins/laboratory_subjects_controller.rb

@@ -17,13 +17,15 @@ class Admins::LaboratorySubjectsController < Admins::BaseController
   def destroy
     return render_js_error('不能删除自建课程', type: :notify) if current_laboratory_subject.ownership?
 
-    current_subject = current_laboratory_subject.subject
+    ActiveRecord::Base.transaction do
-    current_subject.shixuns.each do |shixun|
+      current_subject = current_laboratory_subject.subject
-      shixun.destroy!
+      current_subject.shixuns.each do |shixun|
+        shixun.destroy!
+      end
+      current_subject.destroy!
+
+      render_delete_success
     end
-    current_subject.destroy!
-
-    render_delete_success
   end