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python django 增刪改查操作 數(shù)據(jù)庫Mysql

 更新時間:2017年07月27日 08:51:17   投稿:jingxian  
下面小編就為大家?guī)硪黄猵ython django 增刪改查操作 數(shù)據(jù)庫Mysql。小編覺得挺不錯的,現(xiàn)在就分享給大家,也給大家做個參考。一起跟隨小編過來看看吧

下面介紹一下django增刪改查操作:

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.
# 解決亂碼
import sys
reload(sys)
sys.setdefaultencoding('utf-8')
# 數(shù)據(jù)庫操作
def testdb(request):
  test1 = Test(name='溫鴻雨2')
  test1.save()
  return HttpResponse("<p>數(shù)據(jù)添加成功!</p>")

# 查詢數(shù)據(jù)庫
def selectDB(request):

  # 通過objects這個模型管理器的all()獲得所有數(shù)據(jù)行,相當于SQL中的SELECT * FROM
  list = Test.objects.all()
  returnvalue = []
  for v in list:
    returnvalue.append(v.name)
    print v.name

  print "++++++++++++獲取單個對象++++++++++++++++++"
  # 獲取單個對象
  response1 = Test.objects.filter(id=1)
  print response1
  for v1 in response1:
    returnvalue2 = "id : ", v1.id, " 姓名:", v1.name
    print returnvalue2

  print "++++++++++++限制返回的數(shù)據(jù) 相當于 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 "+++++++++++輸出結(jié)果:++++++++++++++++++++++++++++++"
  return HttpResponse(returnvalue3.items())

#修改數(shù)據(jù)可以使用 save() 或 update():
def updateDB(request):
  # 修改其中一個id=1的name字段,再save,相當于SQL中的UPDATE
  test1 = Test.objects.get(id=1)
  test1.name = 'Google'
  test1.save()

  # 另外一種方式 
  #Test.objects.filter(id=1).update(name='Google') 
  # 修改所有的列 
  # Test.objects.all().update(name='Google')

  return HttpResponse("更新數(shù)據(jù)成功")

def deleteDB(request):
  # 刪除id=1的數(shù)據(jù)
  test1 = Test.objects.get(id=3)
  test1.delete()
  return HttpResponse("刪除數(shù)據(jù)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)

以上這篇python django 增刪改查操作 數(shù)據(jù)庫Mysql就是小編分享給大家的全部內(nèi)容了,希望能給大家一個參考,也希望大家多多支持腳本之家。

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