标签:default test 一对多 删除 imp query 方法 djang gen
如果要在django的模型中添加方法,推荐在模型的自定义管理其中添加方法。
不能使用__init__方法,因为模型继承的父类也有__init__方法。
模型models.py中
关键代码:
class BookInfoManager(models.Manager): # 自定义管理器:应用二 扩展方法 def create_book(self, btitle, bpub_date, bread): book = BookInfo() book.btitle = btitle book.bpub_date = bpub_date book.bread = bread book.save() return book # 定义图书模型类BookInfo class BookInfo(models.Model): book2 = BookInfoManager()
完整代码:
# coding=utf-8 from django.db import models class BookInfoManager(models.Manager): # 自定义管理器:应用一 更改默认查询集 def get_queryset(self): return super(BookInfoManager, self).get_queryset().filter(bread__gt=20) # 自定义管理器:应用二 扩展方法 def create_book(self, btitle, bpub_date, bread): book = BookInfo() book.btitle = btitle book.bpub_date = bpub_date book.bread = bread book.save() return book # 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 bcommet = models.IntegerField(default=0) # 评论量 isDelete = models.BooleanField(default=False) # 逻辑删除 # 创建自定义管理器 book = models.Manager() book2 = BookInfoManager() class Meta: # 元信息类 db_table = ‘bookinfo‘ # 指定表的名称 def __str__(self): return self.btitle # 打印时显示名称 # 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 hcontent = models.CharField(max_length=100) # 英雄描述信息 hbook = models.ForeignKey(‘BookInfo‘) # 英雄与图书表的关系为一对多,所以属性定义在英雄模型中 def __str__(self): return self.hname
视图views.py中
关键代码
def add(requst): book = BookInfo.book2.create_book("天龙八部2", date(2010, 1, 1), 60) return HttpResponse("<a href=‘/‘>首页</a>")
完整代码
from datetime import date from django.shortcuts import render from django.http import HttpResponse from .models import * # Create your views here. def index(request): # return HttpResponse("ok") # context = {‘title‘: "django1", "list": range(10)} # blist=BookInfo.book.all() blist = BookInfo.book2.all() context = {‘blist‘: blist} return render(request, "booktest/index.html", context) def add(requst): # 添加对象 # book = BookInfo() # book.btitle = "流星蝴蝶剑" # book.bpub_date = date(2017, 10, 1) # book.bread = 30 # book.save() book = BookInfo.book2.create_book("天龙八部2", date(2010, 1, 1), 60) return HttpResponse("<a href=‘/‘>首页</a>") def list(request): ‘‘‘ 列出所有的图书信息 ‘‘‘ # 查询所有图书对象 blist = BookInfo.objects.all() # 构造上下文,用于传递数据给模板 context = {‘list‘: blist} # 调用模板 return render(request, ‘booktest/list.html‘, context) pass def detail(request, id): ‘‘‘ 列出编号为id的图书,所有英雄信息 ‘‘‘ # 根据图书编号查询图书对象 book = BookInfo.objects.get(pk=id) # 构造上下文,将图书对象数据传递到模板 context = {‘b‘: book} # 调用模板 return render(request, ‘booktest/detail.html‘, context) pass
urls.py中
from django.conf.urls import include, url from booktest import views urlpatterns = [ url(r‘^$‘, views.index), url(r‘^index/$‘, views.index), url(r‘^list/$‘, views.list), url(r‘^add/$‘, views.add), url(r‘^detail(\d+)/$‘, views.detail), ]
标签:default test 一对多 删除 imp query 方法 djang gen
原文地址:https://www.cnblogs.com/andy9468/p/12853797.html