七日Python之路--第四天（之Django官方文档）

from django.db import models

# Create your models here.

class Repoter(models.Model):
    full_name = models.CharField(max_length=200)
    def __unicode__(self):
        return self.full_name

class Article(models.Model):
    pub_date = models.DateField()
    headline = models.CharField(max_length=200)
    content = models.TextField()
    repoter = models.ForeignKey(Repoter)
    def __unicode__(self):
        return self.headline

dizzy@dizzy-pc:~/Python/django_project/p1$ ./manage.py syncdb
Creating tables ...
Creating table django_admin_log
Creating table auth_permission
Creating table auth_group_permissions
Creating table auth_group
Creating table auth_user_groups
Creating table auth_user_user_permissions
Creating table auth_user
Creating table django_content_type
Creating table django_session

You just installed Django's auth system, which means you don't have any superusers defined.
Would you like to create one now? (yes/no): y
Please enter either "yes" or "no": yes
Username (leave blank to use 'dizzy'): 
Email address: lpe234@qq.com
Password: 
Password (again): 
Superuser created successfully.
Installing custom SQL ...
Installing indexes ...
Installed 0 object(s) from 0 fixture(s)

#导入在“news”应用中创建的“model”
>>> from news.modles import Repoter,Article

#系统中还没有Repoter
>>> Repoter.objects.all()
[]

#创建一个Repoter
>>> r = Repoter(full_name='John Smith')

#将对象保存到数据库中
>>> r.save()

#此时该对象拥有了一个ID
>>> r.id
1

#现在新的Repoter已经在数据库里面了
>>> Repoter.objects.all()
[<Repoter: John Smith>]

#字段被表示成为Python对象的属性
>>> r.full_name
'John Smith'

#Django提供了丰富的数据库查询 API
>>> Repoter.objects.get(id=1)
>>> Repoter.objects.get(full_name__startswith='John')
>>> Repoter.objects.get(full_name__contains='mith')

#创建一个 article
>>> from datetime import date
>>> a = Article(pub_date=date.today(),headline='Django is cool',content='Year.',repoter=r)
>>> a.save()

#现在article已经存在数据库中了
>>> Article.objects.all()
[<Article: Django is cool>]

#通过修改一个对象的属性值，然后调用save()方法来更新数据
>>> r.full_name = 'Billy Goat'
>>> r.save()

#调用delete()方法来删除一个对象
>>> r.delete()

# 在news下的 models.py

from django.db import models

# Create your models here.

class Repoter(models.Model):
    full_name = models.CharField(max_length=200)
    def __unicode__(self):
        return self.full_name

class Article(models.Model):
    pub_date = models.DateField()
    headline = models.CharField(max_length=200)
    content = models.TextField()
    repoter = models.ForeignKey(Repoter)
    def __unicode__(self):
        return self.headline

#在news下的 admin.py

from django.contrib import admin

# Register your models here.

import models

admin.site.register(models.Article)
admin.site.register(models.Repoter)

#在news app中新建 urls.py
from django.conf.urls import patterns

urlpatterns = patterns('',
    ('^articles/(d{4})/$', 'views.year_archive'),
    ('^article/(d{4})/(d{2})/$','views.month_archive'),
    ('^article/(d{4})/(d{2})/(d+)/$','views.article_detail'),
)

#在在根配置urls中，引入app中的urls即可
from django.conf.urls import patterns, include, url
from django.contrib import admin
admin.autodiscover()

urlpatterns = patterns('',
    # Examples:
    # url(r'^$', 'p1.views.home', name='home'),
    # url(r'^blog/', include('blog.urls')),

    url(r'^admin/', include(admin.site.urls)),
    url(r'',include('news.urls'))
)

from django.shortcuts import render

# Create your views here.

from django.shortcuts import render_to_response
from models import Article

def year_archive(request, year):
    a_list = Article.objects.filter(pub_date__year=year)
    return render_to_response('year_archive.html',{'year':year,'article_list':a_list})

def month_archive(request, year, month):
    pass

def article_detail(request, year, month, day):
    pass

<!-- 位置 news/templates/year_archive.html -->
<!-- 在views.py 文件中，直接使用 'year_archive.html' -->

{% block title %}Articles for {{ year }}{% endblock %}

{% block content %}
<h1>Articles for {{ year }}</h1>

{% for article in article_list %}
    <p>{{ article.headline }}</p>
    <p>By {{ article.repoter.full_name }}</p>
    <p>Published {{article.pub_date|date:"F j, Y"}}</p>
{% endfor %}
{% endblock %}

{% extends "base.html" %}

{% load staticfiles %}<html><head>
    <title>{% block title %}{% endblock %}</title></head><body>
    <img src="{% static "images/sitelogo.png" %}" alt="Logo" />
    {% block content %}{% endblock %}</body></html>