【下载文档:  python django 增删改查操作 数据库Mysql.txt 】

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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:
http://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)
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