python django 增删改查操作 数据库Mysql
发布时间:2020-12-17 08:13:22 所属栏目:Python 来源:网络整理
导读:下面介绍一下django增删改查操作: 1、view.py # -*- 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
下面介绍一下django增删改查操作: 1、view.py # -*- 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 "+++++++++++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") 2、urls.py """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),] 3、models.py # -*- 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) 以上这篇python django 增删改查操作 数据库Mysql就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持编程小技巧。 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |