python2.6+django1.0+mysql初体验

在Windows做的，例子是照着http://www.ibm.com/developerworks/cn/opensource/os-cn-django/index.html做的。
但中间因为版本问题，遇到了一些问题，特在此记录下来。
例子和我的版本比较：
python2.5 -- python 2.6
django0.96 -- django1.0

1.maxlength错误
maxlength应该改为max_length

class List(models.Model):
    title = models.CharField([color=red]max_length[/color]=250,unique=True)
    def __str__(self):
        return self.title
    class Meta:
        ordering = ['title']
    class Admin:
        pass

2.ImportError: DLL load failed: 找不到指定的模块
MySQL的Python链接库，开始在http://sourceforge.net/projects/mysql-python/没有找到适合的连接库，通过google找到文章http://i.19830102.com/archives/164，问题解决。

3.配置url的错误
admin后台管理界面的urls.py配置：

# Uncomment the next two lines to enable the admin:
from django.contrib import admin
admin.autodiscover()

urlpatterns = patterns('',
    # Example:
    # (r'^news/', include('news.foo.urls')),

    # Uncomment the admin/doc line below and    add 'django.contrib.admindocs' 
    # to INSTALLED_APPS to enable admin documentation:
    # (r'^admin/doc/', include('django.contrib.admindocs.urls')),

    # Uncomment the next line to enable the admin:
      (r'^admin/(.*)', admin.site.root),
     
)

与例子讲的有所不同。

4.管理界面里，models模块显示不全，没有article模块
在文件夹articlc里，创建文件admin.py

from news.article.models import List
from news.article.models import Item
from django.contrib import admin

admin.site.register(List)
admin.site.register(Item)

5.页面显示报错

  article_dict['items_complete'] = article_list.item_set.filter(completed=True).count() 
               article_dict['percent_complete'] = int(float(article_dict['items_complete']) / article_dict['item_count'] * 100) 

这两段代码应该加上适当的判断，不然数据库没有相应的数据，会报错。

 if  article_dict['item_count'] == 0:
            article_dict['items_complete'] = 0
            article_dict['percent_complete'] = 0
        else:
               article_dict['items_complete'] = article_list.item_set.filter(completed=True).count() 
               article_dict['percent_complete'] = int(float(article_dict['items_complete']) / article_dict['item_count'] * 100)