Django基础(http://www.cnblogs.com/wupeiqi/articles/5237704.html)

Django进阶(http://www.cnblogs.com/wupeiqi/articles/5246483.html)

1. 路由系统, URL

1. url(r'^index/', views.index),       url(r'^home/', views.Home.as_view()),
2. url(r'^detail-(\d+).html', views.detail),
3. url(r'^detail-(?P<nid>\d+)-(?P<uid>\d+).html', views.detail),

ps:
  def detail(request, *args, **kwargs):
      pass

实战:
a.
url(r'^detail-(\d+)-(\d+).html', views.detail),
def func(request,nid, uid):
    pass

def detail(request, *args):
    pass
def detail(request, *args):
    pass

b.
url(r'^detail-(?P<nid>\d+)-(?P<uid>\d+).html', views.detail)
def func(request, nid,uid):
    pass

def func(request, **kwargs):
    kwargs = {'nid': 1,  'uid': 3}

def func(request, *args, **kwargs):
    args = (2, 9)

4. name(作用:根据此名称生成自己想要的URL)
对URL路由关系进行命名,以后可以根据此名称生成自己想要的URL
url(r'^asdfasdfasdf/', views.index, name='i1'),
url(r'^yug/(\d+)/(\d+)/', views.index, name='i2'),
url(r'^buy/(?P<pid>\d+)/(?P<pid>\d+)/', views.index, name='i3'),

def func(request, *args,**kwargs):
  from django.urls import reverse
  
  url1 = reverse('i1')  # asdfasdfasdf/
  url1 = reverse('i2', args=(1,2))  # yug/1/2
  url1 = reverse('i2', kwargs={'pid':1,'nid':9})  # yug/1/9

xxx.html
  {% url "i1" %}   #   asdfasdfasdf/
  {% url "i2" 1 2 %}  # yug/1/2
  {% url "i3" pid=1 nid=9 %}   # yug/1/9



模板语言:
{% url "indexx" %}
{% url "indexx" 3 %}

# 注意:
  # 当前的URL
  request.path_info

2.视图

 request.GET
 request.POST
 request.FILES
# checkbox等多选的内容
request.POST.getlist()

# 上传文件,form标签要做特殊设置
obj.request..FILES.get('fff')
obj.name
f = open(obj.name, mode='wb')
for item in obj.chunks():
  f.write(item)
f.close()

4. FBV & CBV

function base view
url.py
  index -> 函数名
view.py
  def 函数(request):
    ...
===>
/index/ -> 函数名
/index/ -> 类
===>

建议:两者都用

3.模板

4.ORM操作

select * from tb where id >1
# 对应关系
models.tb.objects.filters(id__gt=1)
models.tb.objects.filters(id=1)
models.tb.objects.filters(id__lt=1)

1.Django请求生命周期

1.Django请求生命周期
-> URL对应关系 (匹配) -> 视图函数 -> 返回用户字符串
-> URL对应关系 (匹配) -> 视图函数 -> 打开一个HTML文件,读取内容

2. 创建django project
django-admin startproject mysite
'''
mysite
  mysite
    - 配置文件
    - url.py
    - settings.py
cd  mysite
python manage.py startapp cmdb
mysite
  mysite
    - 配置文件
    - url.py
    - settings.py
  cmdb
    - views.py
    - admin.py
    - models.py  # 创建数据库表

3,配置
模板路径
静态文件路径
# CSRF
4.编写程序
a.url.py
/index/  ->  func
b.views.py
def func(request):
  # 包含所有的请求数据
  ---
  return HttpResponse('字符串')
  return render(request,'index.html',{''})
  return redirect('URL')
c.模板语言
  return render (request, 'index.html', {'li': [11,22,33]})
  {% for item in %}
    <h1>{{ item }}</h1>
  {% endfor %}

**********索引 ************
<h2> {{ item.0 }} </h2>

GET:

• 获取数据

POST:

• 提交数据