Django model类

from mysite.blog.models import BlogPost



node2:/app/mysite/blog#cat models.py
from django.db import models
from django.contrib import admin

# Create your models here.
class BlogPost(models.Model):
    title = models.CharField(max_length = 150)
    body = models.TextField()
    timestamp = models.DateTimeField()
    class Meta:
      ordering =('-timestamp',)
class BlogPostAdmin(admin.ModelAdmin):
    list_display = ('title','timestamp')
admin.site.register(BlogPost,BlogPostAdmin)


BlogPost 继承了class BlogPost(models.Model)类,

我们就获得了Django对象关系映射的全部里拉。


node2:/usr/local/lib/python2.7/site-packages/django#ls
apps  contrib  dispatch  __init__.py   __main__.pyc  shortcuts.pyc  test   views
bin   core     forms     __init__.pyc  middleware    template       urls
conf  db       http      __main__.py   shortcuts.py  templatetags   utils

node2:/usr/local/lib/python2.7/site-packages/django#



node2:/app/mysite/blog#cat view.py 
# -*- coding: utf-8 -*-
from __future__ import unicode_literals
# from django.shortcuts import render, render_to_response
from .models import *	
# Create your views here.
from django.http import HttpResponse
from django.template import loader

def index(req):
# get all blogpost objects
  blog_list = BlogPost.objects.all()
  print blog_list
  template = loader.get_template('index.html')
  context = {
  'blog_list':blog_list
  }
  return HttpResponse(template.render(context, req))
node2:/app/mysite/blog#



def index(req): 第5行每个Django视图函数都将django.http.HttpRequest对象作为它的第一个参数。


  blog_list = BlogPost.objects.all() 当我们把BlogPost类作为django.model.Model的一个子类时,

我们就获得了Django对象关系映射的全部里拉。

 template = loader.get_template('index.html')

这里我们只需告诉Django模板的名字就能创建模板对象template 


因为我们把它保存在app下的templates目录里,Django无需更多指示就能找到它。

node2:/app/mysite/blog/templates#cat index.html 
{% extends "base.html" %}
  {% block content %}
      {% for post in blog_list %}
      <h2>{{  post.title }}</h2>
      <p>{{ post.timestamp | date:"1,F jS"}}</p>
      <p>{{ post.body }}</p>
      {% endfor %}
  {% endblock %}