03-商品功能的设计

一 商品模型的设计

• 商品的模型设计，包含商品的数据设计，商品的类型。

• TypeInfo模型类中有title，isDelete等

• GoodsInfo包含商品的标题，图片，价格，是否删除，重量，点击量，简等

  model.py
  from django.db import models
  from tinymce.models import HTMLField
  class TypeInfo(models.Model):
    ttitle = models.CharField(max_length=20)
    isDelete = models.BooleanField(default=False)
    def __str__(self):
        return self.ttitle.encode('utf-8'）
  class GoodsInfo(models.Model):
    gtitle = models.CharField(max_length=20)
    gpic = models.ImageField(upload_to='df_goods')
    gprice = models.DecimalField(max_digits=5,decimal_places=2)
    isDelete = models.BooleanField(default=False)
    gunit = models.CharField(max_length=20,default='500g')
    gclick =models.IntegerField()
    gjianjie = models.CharField(max_length=200)
    gkucun = models.IntegerField()
    gcontent = HTMLField()
    gtype = models.ForeignKey(TypeInfo)
  
    def __str__(self):
        return  self.gtitle.encode('utf-8')
  

二 商品视图设计

• 商品视图包括商品首页，商品列表页，商品详情页等三个页面的设计

    viwes.py
  from django.shortcuts import render
  
  from .models import TypeInfo, GoodsInfo
  
  from django.core.paginator import Paginator
  def index(request):
    count = request.session.get('count')
    fruit = GoodsInfo.objects.filter(gtype__id=2).order_by("-id")[:4]
    fruit2 = GoodsInfo.objects.filter(gtype__id=2).order_by("-gclick")[:4]
    fish = GoodsInfo.objects.filter(gtype__id=4).order_by("-id")[:4]
    fish2 = GoodsInfo.objects.filter(gtype__id=4).order_by("-gclick")[:3]
    meat = GoodsInfo.objects.filter(gtype__id=1).order_by("-id")[:4]
    meat2 = GoodsInfo.objects.filter(gtype__id=1).order_by("-gclick")[:4]
    egg = GoodsInfo.objects.filter(gtype__id=5).order_by("-id")[:4]
    egg2 = GoodsInfo.objects.filter(gtype__id=5).order_by("-gclick")[:4]
    vegetables = GoodsInfo.objects.filter(gtype__id=3).order_by("-id")[:4]
    vegetables2 = GoodsInfo.objects.filter(gtype__id=3).order_by("-gclick")[:4]
    frozen = GoodsInfo.objects.filter(gtype__id=6).order_by("-id")[:4]
    frozen2 = GoodsInfo.objects.filter(gtype__id=6).order_by("-gclick")[:4]
  
    context = {'title': '首页', 'fruit': fruit,
               'fish': fish, 'meat': meat,
               'egg': egg,
               'vegetables': vegetables,
               'frozen': frozen,
               'fruit2': fruit2, 'fish2': fish2,
               'meat2': meat2,
               'egg2': egg2,
               'vegetables2': vegetables2,
               'frozen2': frozen2,
               'guest_cart': 1, 'page_name': 0,
               'count': count}
  
    return render(request , 'df_goods/index.html', context)
  
  def goodlist(request,typeid,pageid,sort):
    count = request.session.get('count')
  
    newgood = GoodsInfo.objects.all().order_by('-id')[:2]
    if sort =='1':
        sumGoodList = GoodsInfo.objects.filter(
            gtype_id = typeid).order_by('id')
    if sort=='2':
        sumGoodList = GoodsInfo.objects.filter(
            gtype_id = typeid).order_by('gprice')
  
    if sort =='3':
        sumGoodList = GoodsInfo.objects.filter(gtype_id=typeid).order_by('-gclick')
    paginator = Paginator(sumGoodList,15)
    goodList = paginator.page(int(pageid))
    pindexlist = paginator.page_range
  
    goodtype = TypeInfo.objects.get(id = typeid)
  
    context = {'title': '商品详情', 'list': 1,
               'guest_cart': 1, 'goodtype': goodtype,
               'newgood': newgood, 'goodList': goodList,
               'typeid': typeid, 'sort': sort,
               'pindexlist': pindexlist, 'pageid': int(pageid), 'count': count}
  
    # 渲染返回结果
    return render(request, 'df_goods/list.html', context)
  
  def detail(request,id):
    goods = GoodsInfo.objects.get(pk = int(id))
    goods.gclick = goods.gclick+1
    goods.save()
  
    goodtype = goods.gtype
  
    count = request.session.get('count')
    news = goods.gtype.goodsinfo_set.order_by('-id'[0:2])
  
    context = {'title': goods.gtype.ttitle, 'guest_cart': 1,
               'g': goods, 'newgood': news, 'id': id,
               'isDetail': True, 'list': 1, 'goodtype': goodtype, 'count': count}
    response = render(request, 'df_goods/detail.html', context)
  
    goods_ids = request.COOKIES.get('good_ids''')
    goods_id = '%d'%goods_ids
  
    if goods_ids!="":
        goods_id_list = goods_ids.split(',')
        if goods_id_list.count(goods_id)>=1:
            goods_id_list.remove(goods_id)
  
        goods_id_list.insert(0,goods_id)
  
        if len(goods_id_list) >= 6:
            # 超过五个则删除第6个
            del goods_id_list[5]
            # 添加商品id到cookies
        goods_ids = ','.join(goods_id_list)
    else:
        # 第一次添加，直接追加
            goods_ids = goods_id
    response.set_cookie('goods_ids', goods_ids)
  
    return response