python django 增删改查操作 数据库Mysql

 # -*- 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("
数据添加成功！
") # 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 "+++++++++++输出结果：++++++++++++++++++++++++++++++" return HttpResponse(returnvalue3.items()) #修改数据可以使用 save() 或 update(): def updateDB(request): # 修改其中一个id=1的name字段，再save，相当于SQL中的UPDATE test1 = Test.objects.get(id=1) test1.name = 'Google' test1.save() # 另外一种方式 #Test.objects.filter(id=1).update(name='Google') # 修改所有的列 # Test.objects.all().update(name='Google') return HttpResponse("更新数据成功") def deleteDB(request): # 删除id=1的数据 test1 = Test.objects.get(id=3) test1.delete() return HttpResponse("删除数据成功") 

 """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)