新建应用book
python manage.py startapp book
在settings.py注册应用
在book app 的model中编辑ORM类
from django.db import models
#定义图书模型类BookInfo
class BookInfo(models.Model):
btitle = models.CharField(max_length=20)#图书名称
bpub_date = models.DateField()#发布日期
bread = models.IntegerField(default=0)#阅读量
bcomment = models.IntegerField(default=0)#评论量
isDelete = models.BooleanField(default=False)#逻辑删除
class Meta:
verbose_name = "图书信息"
verbose_name_plural = verbose_name
db_table = "bookinfo"
#定义英雄模型类HeroInfo
class HeroInfo(models.Model):
hname = models.CharField(max_length=20)#英雄姓名
hgender = models.BooleanField(default=True)#英雄性别
isDelete = models.BooleanField(default=False)#逻辑删除
hcomment = models.CharField(max_length=200)#英雄描述信息
# on_delete=models.CASCADE 这就是默认的选项，级联删除，你无需显性指定它
hbook = models.ForeignKey('BookInfo',on_delete=models.CASCADE)
#英雄与图书表的关系为一对多，所以属性定义在英雄模型类中
class Meta:
verbose_name = "英雄信息"
verbose_name_plural = verbose_name
db_table = "heroinfo"
迁移数据
插入数据
insert into bookinfo(btitle,bpub_date,bread,bcomment,isDelete) values
('射雕英雄传','1980-5-1',12,34,0),
('天龙八部','1986-7-24',36,40,0),
('笑傲江湖','1995-12-24',20,80,0),
('雪山飞狐','1987-11-11',58,24,0);
insert into heroinfo(hname,hgender,hbook_id,hcomment,isDelete) values
('郭靖',1,1,'降龙十八掌',0),
('黄蓉',0,1,'打狗棍法',0),
('黄药师',1,1,'弹指神通',0),
('欧阳锋',1,1,'蛤蟆功',0),
('梅超风',0,1,'九阴白骨爪',0),
('乔峰',1,2,'降龙十八掌',0),
('段誉',1,2,'六脉神剑',0),
('虚竹',1,2,'天山六阳掌',0),
('王语嫣',0,2,'神仙姐姐',0),
('令狐冲',1,3,'独孤九剑',0),
('任盈盈',0,3,'弹琴',0),
('岳不群',1,3,'华山剑法',0),
('东方不败',0,3,'葵花宝典',0),
('胡斐',1,4,'胡家刀法',0),
('苗若兰',0,4,'黄衣',0),
('程灵素',0,4,'医术',0),
('袁紫衣',0,4,'六合拳',0);
编写视图函数
from django.shortcuts import render
from book.models import BookInfo, HeroInfo
# Create your views here.
def index(request):
list = BookInfo.objects.all()
return render(request, 'book/index.html', {'list':list})
配置路由
from django.contrib import admin
from django.urls import path
from demo.views import show
from book.views import index
urlpatterns = [
path('admin/', admin.site.urls),
path('demo/', show),
path('book/', index),
编写前端页面
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>欢迎来到终点小说网</h1>
<ul>
{% for book in list %}
<li>{{ book.btitle }}</li>
{% endfor %}
</ul>
<h1>英雄展示</h1>
</body>
</html>
-
删除操作
在html中更新
编辑路由
from django.contrib import admin
from django.urls import path
from demo.views import show
from book.views import index, delete
from django.conf.urls import url
urlpatterns = [
url(r'^delete/(\d+)/$', delete),
path('admin/', admin.site.urls),
path('demo/', show),
path('book/', index),
]
编写视图函数
from django.shortcuts import render, redirect
def delete(request, id):
print("delete 被调用, id=", id)
# 根据主键查询
bookinfo = BookInfo.objects.get(id=int(id))
print(bookinfo.btitle)
# 删除
bookinfo.delete()
# 转发
return redirect('/book/',)
然后点击就可以删除了
增加和修改
页面
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>欢迎来到终点小说网</h1>
<a href="/create/">增加一本小说</a>
<ul>
{% for book in list %}
<li>{{ book.btitle }}------<a href="/delete/{{ book.id }}">删除</a>
------<a href="/update/{{ book.id }}">修改阅读量为50等信息</a>
</li>
{% endfor %}
</ul>
<h1>英雄展示</h1>
</body>
</html>
路由
from django.contrib import admin
from django.urls import path
from demo.views import show
from book.views import index, create, delete, update
from django.conf.urls import url
urlpatterns = [
path('admin/', admin.site.urls),
path('demo/', show),
path('book/', index),
path('create/', create),
url(r'^delete/(\d+)/$', delete),
url(r'^update/(\d+)/$', update),
]
def create(request):
book = BookInfo()
book.btitle = "小李飞刀"
book.bcomment = 2222
book.bpub_date = date(1999, 1, 19)
book.save()
return redirect("/book")
def delete(request, id):
print("delete 被调用, id=", id)
# 根据主键查询
bookinfo = BookInfo.objects.get(id=int(id))
print(bookinfo.btitle)
# 删除
bookinfo.delete()
# 转发
return redirect('/book/')
def update(request, id):
bookinfo = BookInfo.objects.get(id=int(id))
bookinfo.btitle = "侠客行"
bookinfo.bcomment = 50
bookinfo.save()
return redirect('/book/')
后台管理
本地化
LANGUAGE_CODE = 'zh-hans'# 中国语言
TIME_ZONE = 'Asia/Shanghai' # 时区
创建超级管理员
python manage.py createsuperuser
注册模型类
from django.contrib import admin
# Register your models here.
from book.models import BookInfo, HeroInfo
admin.site.register(BookInfo)
admin.site.register(HeroInfo)
重新模型类str方法
def __str__(self):
return self.btitle
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