python - 'MultipleObjectsReturne'异常的import语句中使用了哪个文件

Question

我正在使用这个代码

except MultipleObjectsReturned:
    return HttpResponse('some error')

但是我得到了这个错误

全局名称“MultipleObjectsReturned”未定义

Answer 1

您可以执行以下任一操作:

from django.core.exceptions import MultipleObjectsReturned

except MultipleObjectsReturned as e:
    return HttpResponse(e)

或者:

except yourmodel.MultipleObjectsReturned as e:
    return HttpResponse(e)

https://docs.djangoproject.com/en/1.3/ref/exceptions/#django.core.exceptions.MultipleObjectsReturned

A base version of this exception is provided in django.core.exceptions; each model class contains a subclassed version that can be used to identify the specific object type that has returned multiple objects.