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我正在开发一个 django 项目，该项目有一个不加载的大型夹具：

$ python manage.py loaddata apps/mainsite/fixtures/test_auctions.json 
/Users/cp/bidsite/.ve/lib/python2.6/site-packages/django/db/models/fields/subclassing.py:80: DeprecationWarning: A Field class whose get_db_prep_save method hasn't been updated to take a `connection` argument.
  new_class = super(SubfieldBase, cls).__new__(cls, name, bases, attrs)
/Users/cp/bidsite/.ve/lib/python2.6/site-packages/django/db/models/fields/subclassing.py:80: DeprecationWarning: A Field class whose get_db_prep_lookup method hasn't been updated to take `connection` and `prepared` arguments.
  new_class = super(SubfieldBase, cls).__new__(cls, name, bases, attrs)
/Users/cp/bidsite/.ve/lib/python2.6/site-packages/celery/task/schedules.py:5: DeprecationWarning: celery.task.schedules is deprecated and renamed to celery.schedules
  "celery.task.schedules is deprecated and renamed to celery.schedules"))
Problem installing fixture 'apps/mainsite/fixtures/test_auctions.json': Traceback (most recent call last):
  File "/Users/cp/bidsite/.ve/lib/python2.6/site-packages/django/core/management/commands/loaddata.py", line 174, in handle
    obj.save(using=using)
  File "/Users/cp/bidsite/.ve/lib/python2.6/site-packages/django/core/serializers/base.py", line 165, in save
    models.Model.save_base(self.object, using=using, raw=True)
  File "/Users/cp/bidsite/.ve/lib/python2.6/site-packages/django/db/models/base.py", line 570, in save_base
    created=(not record_exists), raw=raw, using=using)
  File "/Users/cp/bidsite/.ve/lib/python2.6/site-packages/django/dispatch/dispatcher.py", line 172, in send
    response = receiver(signal=self, sender=sender, **named)
  File "/Users/cp/bidsite/apps/mainsite/models.py", line 257, in update_auction_details
    auction_json = instance.as_json()
  File "/Users/cp/bidsite/apps/mainsite/models.py", line 1110, in as_json
    'product': self.product.as_json(),
  File "/Users/cp/bidsite/.ve/lib/python2.6/site-packages/django/db/models/fields/related.py", line 315, in __get__
    rel_obj = QuerySet(self.field.rel.to).using(db).get(**params)
  File "/Users/cp/bidsite/.ve/lib/python2.6/site-packages/django/db/models/query.py", line 349, in get
    % self.model._meta.object_name)
DoesNotExist: Product matching query does not exist.

问题是堆栈跟踪没有让我知道夹具上的哪一行导致了这个错误。我该如何调试呢？我唯一能想到的是 ipythgon 中有一个功能，每当您执行某些操作并引发异常时，ipython 会自动注入 pdb 提示符，以便您可以四处走动以弄清楚发生了什么。我该怎么做呢？是否有用于执行此操作的 python 命令行开关？我可以在这里做些什么来调试这个？

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1 回答 1

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这个 Python 食谱将安装一个调试器，该调试器在未捕获的异常上启动：

http://code.activestate.com/recipes/65287-automatically-start-the-debugger-on-an-exception/

它的要点是在 sys.excepthook 中安装一个异常钩子，在调用时调用 pdb.pm()（尽管它比这稍微复杂一些）。

于 2011-02-03T16:26:37.107 回答