增加、修改、删除

第一;,models.py建表

from django.db import models

# Create your models here.

class Book(models.Model): #必须继承models.Model这个类，jango才能识别Book是一张表
    name=models.CharField(max_length=20)#charfield字符串类型，长度20
    #price=models.FloatField()
    price=models.IntegerField ()
    pub_date=models.DateField()
    author=models.CharField(max_length=32,null=False)

class Author(models.Model):
    name=models.CharField(max_length=32)

第二 urls.py 建立连接

from django.conf.urls import url
from django.contrib import admin

from app import views

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'index',views.index),
    url(r'addbook',views.addbook),
    url(r'update',views.update),
    url(r'delete',views.delete),

]

第三：views.py 写处理函数

from django.shortcuts import render,HttpResponse
from app.models import *

# Create your views here.
def index(request):
    return render(request,"index.html")
def addbook(request):
    #Book，使用导入from app.models import *
    b=Book(name="java",price=99,author="qiqi",pub_date="1456-12-12")
    b.save()#save执行，则上面语句成功
    #Book.objects.create(name="",。。。)另一种添加数据，不需要save
    return HttpResponse("添加成功")
    #要想此句需要from django.shortcuts import render,HttpResponse
def update(request):
    Book.objects.filter(name="java").update(price="990")#修改方法一

    # #修改方法二
    # b=Book.objects.get(name="java")#拿到的b是列表类型是queryset集合的
    # b[0].price=100
    # b[0].save()
    return HttpResponse("修改成功")
def delete(request):
    Book.objects.filter(name="java").delete()
    return HttpResponse("删除成功")

输入python manage.py rnserver 8800 访问127.0.0.1：8800/index

第四部：index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .head{
            line-height: 40px;
            background-color: green;
            color: white;
            text-align: center;
        }

    </style>
</head>
<body>
<div class="outer">
    <div class="head">标题</div>
    <div class="content">
        <a href="/addbook/">添加书籍</a>
        <a href="delete">删除书籍</a>
        <a href="update">修改书籍</a>
    </div>
</div>
</body>
</html>

 

posted @ 2018-08-06 14:42  未来的技术  阅读(137)  评论(1)  编辑  收藏  举报