python中关于django对数据库Mysql的增删改查操作详解

# -*- coding: utf-8 -*-
from __future__ import unicode_literals
from django.http import HttpResponse
from polls.models import Test
from django.shortcuts import render
# Create your views here.
# 解决乱码
import sys
reload(sys)
sys.setdefaultencoding('utf-8')
# 数据库操作
def testdb(request):
 test1 = Test(name='温鸿雨2')
 test1.save()
 return HttpResponse("<p>数据添加成功！</p>")

# 查询数据库
def selectDB(request):

 # 通过objects这个模型管理器的all()获得所有数据行，相当于SQL中的SELECT * FROM
 list = Test.objects.all()
 returnvalue = []
 for v in list:
 returnvalue.append(v.name)
 print v.name

 print "++++++++++++获取单个对象++++++++++++++++++"
 # 获取单个对象
 response1 = Test.objects.filter(id=1)
 print response1
 for v1 in response1:
 returnvalue2 = "id : ", v1.id, " 姓名：", v1.name
 print returnvalue2

 print "++++++++++++限制返回的数据 相当于 SQL 中的 OFFSET 0 LIMIT 2;++++++++++++++++++"
 response2 = Test.objects.order_by('name')[0:2]
 returnvalue3 = {}
 for v2 in response2:
 returnvalue3[v2.id] = v2.name

 print returnvalue3.items()
 print "+++++++++++

"""pythondjango URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
 https://docs.djangoproject.com/en/1.11/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. Import the include() function: from django.conf.urls import url, include
 2. Add a URL to urlpatterns: url(r'^blog/', include('blog.urls'))
"""
from django.conf.urls import url
from django.contrib import admin
from BlogDjango import views
from polls import views as pollsviews, search, search2

urlpatterns = [
 url(r'^admin/', admin.site.urls),
 url(r'^hello/+d', views.hello),
 url(r'^base/', views.base),
 url(r'^testdb$', pollsviews.testdb),
 url(r'^querydb$', pollsviews.selectDB),
 url(r'^updateDB$', pollsviews.updateDB),
 url(r'^deleteDB$', pollsviews.deleteDB),
]

# -*- coding: utf-8 -*-
from __future__ import unicode_literals

from django.db import models

# Create your models here.

class Test(models.Model):

 name = models.CharField(max_length=20)