python django 增删改查操作 数据库Mysql

# -*- coding: utf-8 -*-from __future__ import unicode_literalsfrom django.http import HttpResponsefrom polls.models import Testfrom django.shortcuts import render# Create your views here.# 解决乱码import sysreload(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 "+++++++++++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 ConfigurationThe `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 urlfrom django.contrib import adminfrom BlogDjango import viewsfrom polls import views as pollsviews, search, search2urlpatterns = [  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_literalsfrom django.db import models# Create your models here.class Test(models.Model):  name = models.CharField(max_length=20)