重寫代碼：加入if change 和logger

 def save_model(self, request, obj, form, change):
if change:
print('self',self)
print('request',request)
print('obj',obj)
print('form',form)
print("form.cleaned_data['project_name']",form.cleaned_data['project_name'])
print('change',change)
logger.info("%s %s modified the data of %s " % (datetime.now(),request.user.username, obj.project_name))
super().save_model(request, obj, form, change)

效果：