python django 增删改查操作 数据库Mysql

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("

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")

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脚本之家。

0.254872s