第五步、商品首页

1、父模板和缓存的演示
2、首页的开发

index.html显示

{% extends 'base.html' %}
{% load static %}
{% load cache %}
{% block title %}天天生鲜-首页{% endblock %}

{% block topfiles %}
    <script type="text/javascript" src="{% static 'js/jquery-1.12.4.min.js' %}"></script>
    <script type="text/javascript" src="{% static 'js/jquery-ui.min.js' %}"></script>
    <script type="text/javascript" src="{% static 'js/slide.js' %}"></script>
{% endblock %}



{% cache 3600 body %}
{% block body %}


    <div class="navbar_con">
        <div class="navbar">
            <h1 class="fl">全部商品分类</h1>
            <ul class="navlist fl">
                <li><a href="{% url 'goods:index' %}">首页</a></li>
                <li class="interval">|</li>
                <li><a href="javascript:alert('待开发!');">手机生鲜</a></li>
                <li class="interval">|</li>
                <li><a href="javascript:alert('待开发!');">抽奖</a></li>
            </ul>
        </div>
    </div>

    <div class="center_con clearfix">
        <ul class="subnav fl">
            {% for type in types %}
                <li><a href="#model0{{ forloop.counter }}" class="{{ type.logo }}">{{ type.name }}</a></li>
            {% endfor %}
        </ul>
        <div class="slide fl">
            <ul class="slide_pics">
                {% for banner in GoodsBanner %}
                    <li><a href="{% url 'goods:detail' banner.sku.id %}"><img src="{{ banner.image.url }}" alt="幻灯片"></a></li>
                {% endfor %}

            </ul>
            <div class="prev"></div>
            <div class="next"></div>
            <ul class="points"></ul>
        </div>
        <div class="adv fl">
            {% for banner in PromotionBanner %}
                <a href="{{ banner.url }}"><img src="{{ banner.image.url }}" alt=""></a>
            {% endfor %}


        </div>
    </div>

    {% for type in types %}
        <div class="list_model">
            <div class="list_title clearfix">
                <h3 class="fl" id="model0{{ forloop.counter }}">{{ type.name }}</h3>
                <div class="subtitle fl">
                    <span>|</span>
                    {% for banner in type.tltle_banner %}
                        <a href="{% url 'goods:detail' banner.sku.id %}">{{ banner.sku.name }}</a>
                    {% endfor %}
                </div>
                <a href="{% url 'goods:list' type.id 1 %}" class="goods_more fr" id="fruit_more">查看更多 ></a>
            </div>

            <div class="goods_con clearfix">
                <div class="goods_banner fl"><img src="{{ type.image.url }}" alt=""></div>
                <ul class="goods_list fl">
                    {% for banner in type.img_banner %}
                        <li>
                            <h4><a href="#">{{ banner.sku.name }}</a></h4>
                            <a href="{% url 'goods:detail' banner.sku.id %}"><img src="{{ banner.sku.image.url }}" alt=""></a>
                            <div class="prize">¥ {{ banner.sku.price }}</div>
                        </li>
                    {% endfor %}
                </ul>
            </div>
        </div>
    {% endfor %}

{% endblock %}
{% endcache %}

detail.html显示

{% extends 'base_detail_list.html' %}
{% load static %}
{% block title %}天天生鲜-商品详情{% endblock %}

{% block main_content %}

    <div class="breadcrumb">
        <a href="{% url 'goods:index' %}">全部分类</a>
        <span>></span>
        <a href="{% url 'goods:index' %}">{{ sku.type.name }}</a>
        <span>></span>
        <a href="#">商品详情</a>
    </div>
    <div class="goods_detail_con clearfix">
        <div class="goods_detail_pic fl"><img src="{{ sku.image.url }}" alt=""></div>

        <div class="goods_detail_list fr">
            <h3>{{ sku.name }}</h3>
            <p>{{ sku.desc }}</p>
            <div class="prize_bar">
                <span class="show_pirze">¥<em>{{ sku.price }}</em></span>
                <span class="show_unit">单  位：{{ sku.unite }}</span>
            </div>
            <div class="goods_num clearfix">
                <div class="num_name fl">数 量：</div>
                <div class="num_add fl">
                    <input type="text" class="num_show fl" value="1">
                    <a href="javascript:;" class="add fr">+</a>
                    <a href="javascript:;" class="minus fr">-</a>
                </div>
            </div>
            <div>
                <p>其他规格：</p>
                <ul>
                    {% for sku in same_spu_skus %}
                        <li><a href="{% url 'goods:detail' sku.id %}">{{ sku.name }}</a></li>
                    {% endfor %}
                </ul>

            </div>


            <div class="total">总价：<em>16.80元</em></div>
            <div class="operate_btn">
                <a href="javascript:;" class="buy_btn">立即购买</a>
                <a href="javascript:;" sku_id="{{ sku.id }}" class="add_cart" id="add_cart">加入购物车</a>
            </div>
        </div>
    </div>

    <div class="main_wrap clearfix">
        <div class="l_wrap fl clearfix">
            <div class="new_goods">
                <h3>新品推荐</h3>
                <ul>
                    {% for sku in new_skus %}
                        <li>
                            <a href="{% url 'goods:detail' sku.id %}"><img src="{{ sku.image.url }}" alt=""></a>
                            <h4><a href="#">{{ sku.name }}</a></h4>
                            <div class="prize">￥{{ sku.price }}</div>
                        </li>
                    {% endfor %}
                </ul>
            </div>
        </div>

        <div class="r_wrap fr clearfix">
            <ul class="detail_tab clearfix">
                <li class="active">商品介绍</li>
                <li>评论</li>
            </ul>

            <div class="tab_content">
                <dl>
                    <dt>商品详情：</dt>
                    <dd>{{ sku.goods.detail|safe }}
                    </dd>
                </dl>
            </div>
            <div class="tab_content">
                <dl>
                    {% for order in sku_order %}
                        <dt>评论时间：{{ order.update_time }}&nbsp;&nbsp;用户名：{{ order.order.user.username }}</dt>
                        <dd>评论内容：{{ order.comment }}</dd>
                    {% endfor %}
                </dl>
            </div>
        </div>
    </div>
{% endblock %}

{% block bottom %}
    <div class="add_jump"></div>
    {% csrf_token %}
{% endblock %}
{% block bottomfiles %}
    <script type="text/javascript" src="{% static 'js/jquery-1.12.4.min.js' %}"></script>
    <script type="text/javascript">
        update_goods_amount();
        function update_goods_amount() {
            // 获取商品的数量和价格
            var price = $('.show_pirze').children('em').text();
            var count = $('.num_show').val();
            // 计算商品的总价
            price = parseFloat(price);
            count = parseInt(count);
            var amount = price * count;
            $('.total').children('em').text(amount.toFixed(2) + '元');

        }

        // 增加商品的数量
        $('.add').click(function () {
            // 获取商品原油的数目
            var count = $('.num_show').val();
            count = parseInt(count) + 1;
            $('.num_show').val(count);
            update_goods_amount();
        });


        // 减少商品的数量
        $('.minus').click(function () {
            // 获取商品原油的数目
            var count = $('.num_show').val();
            count = parseInt(count) - 1;
            if (count <= 0) {
                count = 1;
            }

            $('.num_show').val(count);
            update_goods_amount();
        });

        // 手动输入商品的数量
        $('.num_show').blur(function () {
            // 获取商品原油的数目
            var count = $(this).val();
            // 校验count是否合法
            if (isNaN(count) || count.trim().length == 0 || parseInt(count) <= 0) {
                count = 1
            }
            // 重新设置商品的数目
            $(this).val(parseInt(count));
            update_goods_amount();
        });

        // 获取add_cart div元素左上角坐标
        var $add_x = $('#add_cart').offset().top;
        var $add_y = $('#add_cart').offset().left;

        // 获取show_count div元素左上角坐标
        var $to_x = $('#show_count').offset().top;
        var $to_y = $('#show_count').offset().left;


        $('#add_cart').click(function () {
            // 获取商品的id和数量
            var sku_id = $(this).attr('sku_id');
            var count = $('.num_show').val();
            var scrf = $('input[name="csrfmiddlewaretoken"]').val();

            // 发起请求
            $.ajax({
                type: 'post',
                url: "{% url 'cart:add' %}",
                data: {
                    sku_id: sku_id,
                    count: count,
                    csrfmiddlewaretoken: scrf,
                },
                success: function (data) {
                    if (data.res === 5) {
                        $(".add_jump").css({'left': $add_y + 80, 'top': $add_x + 10, 'display': 'block'});
                        $(".add_jump").stop().animate({
                                'left': $to_y + 7,
                                'top': $to_x + 7
                            },
                            "fast", function () {
                                $(".add_jump").fadeOut('fast', function () {
                                    $('#show_count').html(data.total_count);
                                });
                            });
                    } else {
                        alert(data.errmsg)
                    }
                }
            });
        })
    </script>
{% endblock %}

list.html显示

{% extends 'base_detail_list.html' %}
{% block title %}天天生鲜-商品列表{% endblock %}

{% block main_content %}

    <div class="breadcrumb">
        <a href="#">全部分类</a>
        <span>></span>
        <a href="#">{{ type.name }}</a>
    </div>

    <div class="main_wrap clearfix">
        <div class="l_wrap fl clearfix">
            <div class="new_goods">
                <h3>新品推荐</h3>
                <ul>
                    {% for sku in new_skus %}
                        <li>
                            <a href="{% url 'goods:detail' sku.id %}"><img src="{{ sku.image.url }}" alt=""></a>
                            <h4><a href="{% url 'goods:detail' sku.id %}">{{ sku.name }}</a></h4>
                            <div class="prize">￥{{ sku.price }}</div>
                        </li>
                    {% endfor %}
                </ul>
            </div>
        </div>

        <div class="r_wrap fr clearfix">
            <div class="sort_bar">
                <a href="{% url 'goods:list' type.id 1 %}" {% if sort == 'default' %}class="active" {% endif %}>默认</a>
                <a href="{% url 'goods:list' type.id 1 %}?sort=price" {% if sort == 'price' %}class="active" {% endif %}>价格</a>
                <a href="{% url 'goods:list' type.id 1 %}?sort=hot" {% if sort == 'hot' %}class="active" {% endif %} >人气</a>
            </div>

            <ul class="goods_type_list clearfix">
                {% for sku in skus_page %}

                    <li>
                        <a href="{% url 'goods:detail' sku.id %}"><img src="{{ sku.image.url }}"></a>
                        <h4><a href="{% url 'goods:detail' sku.id %}">大兴大棚草莓</a></h4>
                        <div class="operate">
                            <span class="prize">￥{{ sku.price }}</span>
                            <span class="unit">{{ sku.price }}/{{ sku.unite }}</span>
                            <a href="{% url 'goods:detail' sku.id %}" class="add_goods" title="加入购物车"></a>
                        </div>
                    </li>
                {% endfor %}


            </ul>

            <div class="pagenation">
                {% if skus_page.has_previous %}
                    <a href="{% url 'goods:list' type.id skus_page.previous_page_number %}?sort={{ sort }}">上一页</a>
                {% endif %}
                {% for page in skus_page.paginator.page_range %}
                    {% if page == skus_page.number %}
                        <a href="{% url 'goods:list' type.id page %}" class="active">{{ page }}</a>
                    {% else %}
                        <a href="{% url 'goods:list' type.id page %}">{{ page }}</a>
                    {% endif %}
                {% endfor %}
                {% if skus_page.has_next %}
                    <a href="{% url 'goods:list' type.id skus_page.next_page_number %}?sort={{ sort }}">下一页></a>
                {% endif %}
            </div>
        </div>
    </div>
{% endblock %}

search.html显示

{% extends 'base_detail_list.html' %}
{% block title %}天天生鲜-商品搜索结果页面{% endblock %}

{% block main_content %}

    <div class="breadcrumb">
        <a href="#">{{ query }}</a>
        <span>></span>
        <a href="#">搜索结果如下:</a>
    </div>

    <div class="main_wrap clearfix">


        <ul class="goods_type_list clearfix">
            {% for item in page %}

                <li>
                    <a href="{% url 'goods:detail' item.object.id %}"><img src="{{ item.object.image.url }}"></a>
                    <h4><a href="{% url 'goods:detail' item.object.id %}">{{ item.object.name }}</a></h4>
                    <div class="operate">
                        <span class="prize">￥{{ item.object.price }}</span>
                        <span class="unit">{{ item.object.price }}/{{ sku.unite }}</span>
                        <a href="{% url 'goods:detail' item.object.id %}" class="add_goods" title="加入购物车"></a>
                    </div>
                </li>
            {% endfor %}
        </ul>

{#        <div class="pagenation">#}
{#            {% if skus_page.has_previous %}#}
{#                <a href="{% url 'goods:list' type.id skus_page.previous_page_number %}?sort={{ sort }}">上一页</a>#}
{#            {% endif %}#}
{#            {% for page in skus_page.paginator.page_range %}#}
{#                {% if page == skus_page.number %}#}
{#                    <a href="{% url 'goods:list' type.id page %}" class="active">{{ page }}</a>#}
{#                {% else %}#}
{#                    <a href="{% url 'goods:list' type.id page %}">{{ page }}</a>#}
{#                {% endif %}#}
{#            {% endfor %}#}
{#            {% if skus_page.has_next %}#}
{#                <a href="{% url 'goods:list' type.id skus_page.next_page_number %}?sort={{ sort }}">下一页></a>#}
{#            {% endif %}#}
{#        </div>#}
    </div>

{% endblock %}

base.py编写

from django.db import models


class BaseModel(models.Model):
    '''模型抽象基类'''
    create_time = models.DateTimeField(auto_now_add=True, verbose_name='创建时间')
    update_time = models.DateTimeField(auto_now_add=True, verbose_name='更新时间')
    delflag = models.BooleanField(default=False, verbose_name='删除标识')

    class Meta:
        abstract = True

goods.views.py编写

from django.shortcuts import render, redirect, reverse
from django.core.paginator import Paginator
from django.views import View
from goods.models import *
from order.models import OrderGoods
from django_redis import get_redis_connection


# Create your views here.


class IndexView(View):

    def get(self, request):
        # 获取商品种类
        types =     GoodsType.objects.all()
        # 获取首页轮播商品信息
        GoodsBanner = IndexGoodsBanner.objects.all().order_by('index')
        # 获取首页活动信息
        PromotionBanner = IndexPromotionBanner.objects.all().order_by('index')
        # 获取首页分类商品展示信息
        for type in types:
            type.img_banner = IndexTypeGoodsBanner.objects.filter(
                type=type, display_type=1).order_by('index')
            type.tltle_banner = IndexTypeGoodsBanner.objects.filter(
                type=type, display_type=0).order_by('index')

        # 获取购物车商品数量
        cart_count = 0
        if request.user.is_authenticated:
            coon = get_redis_connection('default')
            cart_key = 'cart_%d' % request.user.id
            cart_count = coon.hlen(cart_key)

        # 模板上下文
        context = {
            'types': types,
            'GoodsBanner': GoodsBanner,
            'PromotionBanner': PromotionBanner,
            'cart_count': cart_count,
        }

        return render(request, 'index.html', context)


class DetailView(View):
    def get(self, request, pk):
        # 查询商品id是否存在
        try:
            sku = GoodsSKU.objects.get(pk=pk)
        except GoodsSKU.DoesNotExist:
            return redirect(reverse('goods:index'))

        # 获取商品的分类信息
        types = GoodsType.objects.all()
        # 获取商品的评论
        sku_orders = OrderGoods.objects.filter(sku=sku).exclude(comment='')
        # 获取新品信息
        new_skus = GoodsSKU.objects.filter(
            type=sku.type).order_by('-create_time')[0:2]

        # 获取同一商品spu的其他规格商品
        same_spu_skus = GoodsSKU.objects.filter(goods=sku.goods).exclude(pk=pk)

        # 获取购物车商品数量
        cart_count = 0
        if request.user.is_authenticated:
            coon = get_redis_connection('default')
            cart_key = 'cart_%d' % request.user.id
            cart_count = coon.hlen(cart_key)

            # 添加用户的历史浏览记录
            coon = get_redis_connection('default')
            history_key = 'history_%d' % request.user.id
            # 移除之前的该商品id
            coon.lrem(history_key, 0, pk)
            # 把goods_id左侧插入redis列表
            coon.lpush(history_key, pk)
            # 取用户保存的最新5条信息
            coon.ltrim(history_key, 0, 4)

        context = {
            'sku': sku,
            'types': types,
            'sku_order': sku_orders,
            'new_skus': new_skus,
            'cart_count': cart_count,
            'same_spu_skus': same_spu_skus
        }

        return render(request, 'detail.html', context)


class ListView(View):
    def get(self, request, type_id, page):
        # 获取种类信息
        try:
            type = GoodsType.objects.get(pk=type_id)
        except GoodsType.DoesNotExist:
            return redirect(reverse('goods:index'))

        types = GoodsType.objects.all()

        sort = request.GET.get('sort', 'default')
        if sort == 'price':
            skus = GoodsSKU.objects.filter(type=type).order_by('price')
        elif sort == 'hot':
            skus = GoodsSKU.objects.filter(type=type).order_by('sales')
        else:
            skus = GoodsSKU.objects.filter(type=type).order_by('-id')

        paginator = Paginator(skus, 8)

        # 对页码进行容错处理
        try:
            page = int(page)
        except Exception:
            page = 1

        if page > paginator.num_pages:
            page = paginator.num_pages

        skus_page = paginator.page(page)

        # todo 页码的控制
        # 1 当总页数小于5页，页面上显示所有页面
        # 2 如果当前页是前三页  显示前5页的页码
        # 3 如果当前页是后三页码  显示后5页
        # 4 其他情况  显示当前页的前两页  当前页  当前页的后两页
        num_pages = paginator.num_pages
        if num_pages < 5:
            pages = range(1, num_pages + 1)
        elif page <= 3:
            pages = range(1, 6)
        elif num_pages - page <= 2:
            pages = range(num_pages - 4, num_pages + 1)
        else:
            pages = range(page - 2, page + 3)

        # 获取新品信息
        new_skus = GoodsSKU.objects.filter(
            type=type).order_by('-create_time')[0:2]

        # 获取购物车商品数量
        cart_count = 0
        if request.user.is_authenticated:
            coon = get_redis_connection('default')
            cart_key = 'cart_%d' % request.user.id
            cart_count = coon.hlen(cart_key)

        context = {
            'type': type,
            'types': types,
            'skus_page': skus_page,
            'new_skus': new_skus,
            'cart_count': cart_count,
            'sort': sort,
            'pages': pages
        }

        return render(request, 'list.html', context)

search_index.py编写

# 定义索引类
from haystack import indexes
from goods.models import GoodsSKU


class GoodsSKUIndex(indexes.SearchIndex, indexes.Indexable):
    text = indexes.CharField(document=True, use_template=True)

    def get_model(self):
        return GoodsSKU

    def index_queryset(self, using=None):
        return self.get_model().objects.all()

admin.py编写

from django.contrib import admin
from goods.models import *
# Register your models here.

admin.site.register(GoodsType)
admin.site.register(GoodsSKU)
admin.site.register(Goods)
admin.site.register(GoodsImage)
admin.site.register(IndexGoodsBanner)
admin.site.register(IndexTypeGoodsBanner)
admin.site.register(IndexPromotionBanner)

admins.py编写

import xadmin
from .models import *


class GoodsTypeAdmin(object):
    list_display = ['id', 'name', 'logo', 'image']
    list_display_links = ['id', 'name']
    search_fields = ['name', 'create_time', 'update_time']
    list_filter = ['create_time', 'update_time', 'delflag']


class GoodsSKUAdmin(object):
    list_display = ['id', 'name', 'detail']
    list_display_links = ['id', 'name']
    search_fields = ['name', 'create_time', 'update_time']
    list_filter = ['create_time', 'update_time', 'delflag']

class GoodsAdmin(object):
    list_display = ['id', 'type', 'goods', 'name', 'price', 'unite']
    list_display_links = ['id', 'name']
    search_fields = ['name', 'create_time', 'update_time']
    list_filter = ['create_time', 'update_time', 'delflag']

class GoodsImageAdmin(object):
    list_display = ['id', 'sku', 'image']
    list_display_links = ['id', 'sku']
    search_fields = ['name', 'create_time', 'update_time']
    list_filter = ['create_time', 'update_time', 'delflag']


xadmin.site.register(GoodsType, GoodsTypeAdmin)
xadmin.site.register(GoodsSKU, GoodsSKUAdmin)
xadmin.site.register(Goods, GoodsSKUAdmin)
xadmin.site.register(GoodsImage, GoodsImageAdmin)
xadmin.site.register(IndexGoodsBanner)
xadmin.site.register(IndexTypeGoodsBanner)
xadmin.site.register(IndexPromotionBanner)

urls.py编写

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from django.urls import path, re_path
from . import views


app_name = 'goods'

urlpatterns = [
    path('', views.IndexView.as_view(), name='index'),
    re_path(r'^goods/(?P<pk>\d+)$', views.DetailView.as_view(), name='detail'),
    re_path(r'^list/(?P<type_id>\d+)/(?P<page>\d+)$', views.ListView.as_view(), name='list')
]