BUILDING A PASTEBIN（创建pastebin小项目）

djang里的url.py在我们的项目里使用来控制进入站点的流向，所有进入的urls将会与urlpatterns里配置的正则表达式匹配。

开始：设计app （Designing a pastebin app）

Allow users to paste some text （允许用户复制）

Allow users to edit or delete the text （允许用户编辑和删除）

Allow users to view all texts （允许用户查看所有的文本信息）

Clean up texts older than a day （清除掉超过一天的文本内容）

Some ‘views’ that the user will see are（html展示）

A list view of all recent texts （列出最近的文本）

A detail view of any selected text （每个文本的详细信息）

An entry/edit form for a text （编辑文本界面）

A view to delete a text （删除界面）

我们将会用到的generic View

django.views.generic.DetailView

(用来显示每个文本的详细信息)

django.views.generic.ListView

（用来显示文本的列表，全部文本）

django.views.generic.DeleteView

（删除）

django.views.generic.UpdateView

（更改、编辑）

创建一个应用

django-admin manage.py startproject pastebin

（创建项目）

django-admin manage.py startapp app02

（创建 app02 应用）In pastebin/models.pyfrom django.db import models# Create your models here.class Paste(models.Model):    text = models.TextField()    name = models.CharField(max_length=40, null=True, blank=True)    created_on = models.DateTimeField(auto_now_add=True)    updated_on = models.DateTimeField(auto_now=True)    def __unicode__(self):        return self.name or str(self.id) auto_now_add 把当前时间给 created_on字段，并且每次提交后不可更改。 auto_now 与 auto_now_add 类似，但是每次更改完文本再次提交后会改变，显示当前提交的时间。 id 是默认创建的主键 Adding our app to the project

INSTALLED_APPS = ('django.contrib.admin','django.contrib.auth','django.contrib.contenttypes','django.contrib.sessions','django.contrib.messages','django.contrib.staticfiles',#'app01','app02',)

数据库的配置

DATABASES = {    'default': {        'ENGINE': 'django.db.backends.sqlite3',             'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),    }}

同步数据库

django-admin manage.py  makemigrations

　django-admin manage.py mirgate

配置app02/urls.py pastebin/urls.py

1、/pastebin/urls.py

from django.conf.urls import patterns, include, urlfrom django.contrib import adminurlpatterns = patterns('',      url(r'^admin/', include(admin.site.urls)),     (r'^pastebin/', include('app02.urls')),)

2、app/urls.py

'''@author: xaiowei'''from django.views.generic.list import ListViewfrom django.conf.urls import *from app02.models import Pastefrom django.conf.urls.i18n import urlpatternsfrom sre_parse import Patternfrom    django.views.generic import DetailViewfrom django.views.generic.edit import  CreateViewfrom django.conf.urls import patternsfrom gc import get_objectsfrom app02.views import MyDetailView,MyListView,show,MyDeleteView,MyUpdateViewurlpatterns = patterns ('',url(r'^paste/(?P
       
        \d+)/$',MyDetailView.as_view(),name='pastebin_paste_detail'),url(r'^pastes/$', MyListView.as_view(),name='pastebin_paste_list'),url(r'^index/$', 'app02.views.show'),url(r'^paste/delete/(?P
        
         \d+)$',MyDeleteView.as_view() , name='pastebin_paste_delete'),  DetailView读取的是pk或者slugurl  (r'^paste/edit/(?P
         
          \d+)$', MyUpdateView.as_view(), name='pastebin_paste_edit'),    UpdateView读取的也是pk或者slugurl(r'^$',CreateView.as_view(model=Paste)),                ) 配置模板 app02/templates/app02/paste_form.html


        首页    Create new Paste
    
        
                      {
       % csrf_token %}            
         
                           {
       { form.as_table }}            
         
           
             
        
    View All

app02/templates/app02/paste_detail.html


        detail{
       % if messages %}    
            
         
              {
       % for message in messages %}        
                      {
       { message }}         
        {
       % endfor %}    
         
    
        
{
       % endif %}Paste Details: 
    
                
         ID        
         {
      { object.id }}    
        
    
                
         Name        
         {
      { object.name }}    
        
    
                
         Text        
         {<div></div>      { object.text }}    
        
    
                
         Created        
         {
      { object.created_on }}    
        
    
                
         Modified        
         {
      { object.updated_on }}    
        
Actions
    
                
                   Edit this paste        
              
                     Delete this paste        
    
        
View All

app02/templates/app02/paste_list.html


        <h1>list</h1>    {
       % if show %}        Recent Pastes:
    
        
                 {
       % for paste in show %}        
                     {
      { paste }}        
        {
       % endfor %}    
        
    {
       % else %}        No recent pastes
    {
       % endif %}

app02/templates/app02/paste_confirm_delete.html


        Insert title here     Really delete paste {
      { object }}?
        This action cannot be undone
        
        
                 {
       % csrf_token %}

app02/views.py

from django.shortcuts import render# Create your views here.from django.views import genericfrom app02.models import Pastefrom django.core.urlresolvers import reverse_lazyclass MyDetailView(generic.DetailView):    model = Paste    template_name='app02/paste_detail.html'class MyListView(generic.ListView):    context_object_name='show'    template_name='app02/paste_list.html'        def get_queryset(self):        """Return the last five published questions."""        return Paste.objects.all()class MyDeleteView(generic.DeleteView):    model = Paste    success_url = reverse_lazy('pastebin_paste_list')class MyUpdateView(generic.UpdateView):    model = Paste  def show(request):    a = Paste.objects.all()    return render(request,'app02/index.html',{
      'a':a})