Python django

#coding:utf-8
#view

from django.shortcuts import render
from django.http import HttpResponse
from app1.models import Person
from django.http import JsonResponse
from django.http import HttpResponseRedirect   #跳转
from django.db import connection #执行自定义db
import include_test
from .forms import AddForm
# Create your views here.
 
def index(request):
    title = u"标题";
    info_dict = [{'site': u'名称1', 'content': u'T技术教程'},{'site': u'name2', 'content': u'技术教程2'}]
    b=Person.objects.all();
    return render(request, 'app1/home.htm',{'info_dict': info_dict,"title":title,"persion":b})

def add(request):
    a = request.GET['a'];
    b = request.GET['b'];
    c = int(a) + int(b);
    return HttpResponse(str(c));

def add2(request, a, b):
    c = int(a) + int(b);
    return HttpResponse(str(c));

#below is ajax test
def ajax_list(request):
    a = range(100)
    return JsonResponse(a, safe=False)
 
def ajax_dict(request):
    name_dict = {'twz': 'Love python and Django', 'zqxt': 'I am teaching Django'}
    return JsonResponse(name_dict)


def dictfetchall(cursor):
    #"将游标返回的结果保存到一个字典对象中"
    desc = cursor.description
    return [
        dict(zip([col[0] for col in desc], row))
        for row in cursor.fetchall()
    ]
# 引入我们创建的表单类
def index_from(request):
    rs=[];
    cursor = connection.cursor()
    if request.method == 'POST':# 当提交表单时
     
        a=request.POST['a']
        b= request.POST['b']
        #wirte to db
        sql="INSERT INTO `app1_person` ( `name`, `age`) VALUES ('"+a+"', '"+b+"')";
        print sql; #控制台输出   
        cursor.execute(sql);
        cursor.execute("SELECT * FROM app1_person order by id desc");
        #rs = cursor.fetchall()
        rs = dictfetchall(cursor)
        print(rs);
        return HttpResponseRedirect('/?from=1')  #跳转到index界面 
        #return HttpResponse(str(int(a) + int(b)))
     
    else:# 当正常访问时       
        cursor.execute("SELECT * FROM app1_person order by id desc");
        rs = dictfetchall(cursor)
        #rs = cursor.fetchall() #返回的是元组
    
    return render(request, 'app1/form.htm', {'rs':rs})

#coding:utf-8
"""helloworld URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
    https://docs.djangoproject.com/en/1.8/topics/http/urls/
Examples:
Function views
    1. Add an import:  from my_app import views
    2. Add a URL to urlpatterns:  url(r'^$', views.home, name='home')
Class-based views
    1. Add an import:  from other_app.views import Home
    2. Add a URL to urlpatterns:  url(r'^$', Home.as_view(), name='home')
Including another URLconf
    1. Add a URL to urlpatterns:  url(r'^blog/', include('blog.urls'))
"""
from django.conf.urls import include, url
from django.contrib import admin

from app1 import views as app1_views  # new
urlpatterns = [
    url(r'^admin/', include(admin.site.urls)),
    url(r'^$', app1_views.index, name='home'),  # new
    
    url(r'^add/$', app1_views.add, name='add'),

    #正则表达式中 d 代表一个数字，+ 代表一个或多个前面的字符，写在一起 d+ 就是一个或多个数字，用括号括起来的意思是保存为一个子组
    url(r'^add2/(d+)/(d+)/$', app1_views.add2, name='add2'),
    url(r'^add3/(d+)/(d+)/$', app1_views.add2, name='add3'),

    #ajax
    url(r'^ajax_list/$', app1_views.ajax_list, name='ajax-list'),
    url(r'^ajax_dict/$', app1_views.ajax_dict, name='ajax-dict'),
    
    #form 
    url(r'^index_from/$', app1_views.index_from, name='index_from'),

]

#coding:utf-8
from django.db import models
#from __future__ import unicode_literals
#from django.utils.encoding import python_2_unicode_compatible
# Create your models here.
import os
os.environ['DJANGO_SETTINGS_MODULE'] = 'helloworld.settings'
#DJANGO_SETTINGS_MODULE 环境配置
class Person(models.Model):
    name = models.CharField(max_length=30)
    age = models.IntegerField()
    def __unicode__ (self):  #用于后台显示出来操作主要看admin.py
        return self.name
class Blog(models.Model):
    name = models.CharField(max_length=100)
    tagline = models.TextField()
    def __unicode__ (self):
        return self.name
class Author(models.Model):
    name = models.CharField(max_length=50)
    email = models.EmailField()
    def __unicode__ (self):
        return self.name
class Entry(models.Model):
    blog = models.ForeignKey(Blog)
    headline = models.CharField(max_length=255)
    body_text = models.TextField()
    pub_date = models.DateField()
    mod_date = models.DateField()
    authors = models.ManyToManyField(Author)
    n_comments = models.IntegerField()
    n_pingbacks = models.IntegerField()
    rating = models.IntegerField()
    def __unicode__ (self):
        return self.blog

1. 新建一个 django project

1	django-admin.py startproject project-name

一个 project 为一个项目，project-name 项目名称，改成你自己的，要符合Python 的变量命名规则（以下划线或字母开头）

2. 新建 app

1 2	python manage.py startapp app-name 或 django-admin.py startapp app-name

一般一个项目有多个app, 当然通用的app也可以在多个项目中使用。

3. 同步数据库

1 2 3 4 5

python manage.py syncdb   注意：Django 1.7.1及以上的版本需要用以下命令 python manage.py makemigrations python manage.py migrate