django book学习问题记录

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位置：第五章《模型》

问题描述：

>>> p1 = Publisher.objects.create(name=‘Apress‘,
...     address=‘2855 Telegraph Avenue‘,
...     city=‘Berkeley‘, state_province=‘CA‘, country=‘U.S.A.‘,
...     website=‘http://www.apress.com/‘)
>>> p2 = Publisher.objects.create(name="O‘Reilly",
...     address=‘10 Fawcett St.‘, city=‘Cambridge‘,
...     state_province=‘MA‘, country=‘U.S.A.‘,
...     website=‘http://www.oreilly.com/‘)
>>> publisher_list = Publisher.objects.all()
>>> publisher_list
[<Publisher: Publisher object>, <Publisher: Publisher object>] #当我们打印整个publisher列表时，我们没有得到想要的有用信息，无法把对象区分开来：

为mysite\books\modules里的三个模型添加__unicode__()方法后，就可以看到效果了：

>>> from books.models import Publisher
>>> publisher_list = Publisher.objects.all()
>>> publisher_list
[<Publisher: Apress>, <Publisher: O‘Reilly>]

错误：添加__unicode__()方法无效果。

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