django web开发指南-实例 1： Photo Gallery运行起来修改点。

django web开发指南第七章 photo gallery开发补充点（相对于书中代码）注：django版本 1.7.1, python 2.7.8

此文只更改了部分，完整代码在我的github上，

另： 如果要程序在python3.4.2上运行，需要将与本程序相关的from * import *以根目录为基准，比如 from views import IndexViews, 则会提示无views module,只要改为from Item.views import IndexViews即可。

1 models.py完整代码

from django.db import models #增加
from django.contrib import admin #增加

# Create your models here.

class Item(models.Model):
    name = models.CharField(max_length = 250)
    description = models.TextField()
    
    class Meta:
        ordering = ['name']
    
    def __unicode__(self):
        return self.name
   
    @models.permalink    #更改
    def get_absolute_url(self):
        return ('item_detail', None, {'pk':self.id})
# object_id 改为pk,是为后面items/url.py, 
        
class Photo(models.Model):
    item = models.ForeignKey(Item)
    title = models.CharField(max_length=100)
    image = models.ImageField(upload_to='photos')
    caption = models.CharField(max_length=250, blank=True)
    
    class Meta:
        ordering = ['title']
    
    def __unicode__(self):
        return self.title
        
    @models.permalink   #更改
    def get_absolute_url(self):
        return ('photo_detail', None, {'pk':self.id}) 
# object_id 改为pk,是为后面items/url.py, 
        
class PhotoInline(admin.StackedInline):
    model = Photo
    
class ItemAdmin(admin.ModelAdmin):
    inlines = [PhotoInline]
    
admin.site.register(Item, ItemAdmin)
admin.site.register(Photo)

2 settings.py增加如下代码

MEDIA_ROOT = os.path.join(BASE_DIR, 'media')
MEDIA_URL =  '/media/'

3 django 1.7.1请安装pillow

pip install pillow

4 此时，如果按教程操作，点击currently:link会报404错误

Page not found (404)

Request Method:GETRequest URL:http://127.0.0.1:8000/media/photos/2.jpg

Using the URLconf defined in gallery.urls, Django tried these URL patterns, in this order:

1. ^admin/

The current URL, media/photos/2.jpg, didn't match any of these.

urls.py源代码改为如下：

from django.conf.urls import patterns, include, url
from django.contrib import admin

from django.conf import settings
from django.conf.urls.static import static

urlpatterns = patterns('',
    # Examples:
    # url(r'^$', 'gallery.views.home', name='home'),
    # url(r'^blog/', include('blog.urls')),

    url(r'^admin/', include(admin.site.urls)),
) + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

完整代码的运行截图如下