一、启动项目：
django-admin start mysite1
cd mysite1
python manage.py startapp loginapp
根据上文敲命令就可以创建好了一个项目结构，之后就是修改配置文件，这里使用的数据库是MySQL的。
二、修改配置文件：
settings.py
"""
Django settings for mysite1 project. Generated by 'django-admin startproject' using Django 1.8. For more information on this file, see
https://docs.djangoproject.com/en/1.8/topics/settings/ For the full list of settings and their values, see
https://docs.djangoproject.com/en/1.8/ref/settings/
""" # Build paths inside the project like this: os.path.join(BASE_DIR, ...)
import os BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__))) # Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/1.8/howto/deployment/checklist/ # SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'u-=+xrj*5cr+z92==pmlct&c2ta+7o8ia8_y!(ne^*538_afr1' # SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True ALLOWED_HOSTS = [] # Application definition INSTALLED_APPS = (
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'loginapp'
) MIDDLEWARE_CLASSES = (
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'django.middleware.security.SecurityMiddleware',
) ROOT_URLCONF = 'mysite1.urls' TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
],
},
},
] WSGI_APPLICATION = 'mysite1.wsgi.application' # Database
# https://docs.djangoproject.com/en/1.8/ref/settings/#databases DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'mysite1',
'USER': 'root',
'HOST': '127.0.0.1',
'PORT': '',
}
} # Internationalization
# https://docs.djangoproject.com/en/1.8/topics/i18n/ LANGUAGE_CODE = 'en-us' TIME_ZONE = 'UTC' USE_I18N = True USE_L10N = True USE_TZ = True # Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/1.8/howto/static-files/ STATIC_URL = '/static/'
三、创建数据库：
mysql -h 127.0.0.1 -u root
create database mysite1
exit
然后编辑models.py文件：
from django.db import models # Create your models here.
class account(models.Model):
username = models.CharField(max_length=20)
password = models.CharField(max_length=256)
然后选择创建数据库表结构
$ python manage.py migrate # 创建表结构
$ python manage.py makemigrations loginapp # 让 Django 知道我们的模型有一些变更
$ python manage.py migrate loginapp # 创建表结构
四、编写urls.py文件：
from django.conf.urls import include, url
from django.contrib import admin
from loginapp import views urlpatterns = [
# Examples:
# url(r'^$', 'mysite1.views.home', name='home'),
# url(r'^blog/', include('blog.urls')), url(r'^admin/', include(admin.site.urls)),
url(r'^login/', 'loginapp.views.login'),
url(r'^main/', 'loginapp.views.main'),
url(r'^logout/', 'loginapp.views.logout'),
]
五、最重要的视图函数到了：
views.py
# -*- coding:utf-8 -*-
import hashlib
from django.shortcuts import render
from django.http import HttpResponse
from models import account
# Create your views here.
def get_md5(text):
md5 = hashlib.md5()
d5.update(text)
return md5.hexdigest() def login(request):
user = request.GET["user"]
pswd = request.GET["pswd"]
#pswd = get_md5(pswd)
result = account.objects.get(username=user)
try:
if pswd == result.password:
response = HttpResponse("Welcome %s, Login Success!"%user)
response.set_cookie("login_name",user)
response.set_cookie("login_code",1)
return response
else:
return HttpResponse("Sorry,Login Failed!")
except Excception,ex:
return HttpResponse("Sorry,Login Failed!") def main(request):
if "login_code" in request.COOKIES:
logincode = request.COOKIES["login_code"]
print logincode
print type(logincode)
if logincode == "":
return HttpResponse("Yes , sir!")
else:
return HttpResponse("Sorry , sir!") def logout(request):
user = request.GET["user"]
if "login_name" in request.COOKIES:
if user == request.COOKIES["login_name"]:
response = HttpResponse("ByeBye!")
response.set_cookie("login_code",0)
return response
else:
return HttpResponse("Sorry User Error!")
else:
return HttpResponse("Sorry User Error!")
六、总结：
1、数据库的对象应该是from modles.py import classname 这里就是数据库对象了，然后就是classname.objects.get或者其他操作；
2、get方法获取的是符合条件的数据的一项，是一个数据实例，其属性使用ret.name方式调用；
3、读写cookie，cookie在request.COOKIES中，字典结构，写的事后麻烦一些，需要response = HttpResponse等一类返回响应对象的函数的返回值。然后使用response.ser_cookie(key,value)方式设置，最后return response返回；
from models import account
#create a new user
account.objects.create(username=user,password=pswd)
##or
object = account(username=user,password=pswd)
object.save() #delete a user
account.objects.filter(username=user).delete() #update a user
account.objects.filter(username=user).update(password=pswd)
##or
object = account.objects.get(username=user)
object.password = pswd
object.save() #query for a user
account.objects.get(username=user,password=pswd)
##or
account.objects.all()
##or
account.objects.all().values(username)
account.objects.all().values_list(username,password)
