Python项目Django结算订单接口设计和定义

结算订单逻辑分析
结算订单是从Redis购物车中查询出被勾选的商品信息进行结算并展示

后端接口定义

class OrderSettlementView(LoginRequiredMixin, View):
"""结算订单"""
def get(self, request):
"""提供订单结算页面"""
return render(request, 'place_order.html')


结算订单后端逻辑实现

class OrderSettlementView(LoginRequiredMixin, View):
"""结算订单"""
def get(self, request):
"""提供订单结算页面"""
# 获取登录用户

# 查询地址信息

# 从Redis购物车中查询出被勾选的商品信息

# 准备初始值

# 查询商品信息

# 补充运费

# 渲染界面
return render(request, 'place_order.html', context)


结算订单页面渲染

<h3 class="common_title">确认收货地址</h3>
<div class="common_list_con clearfix" id="get_site">
<dl>
{% if addresses %}
<dt>寄送到：</dt>
{% for address in addresses %}
<dd @click="nowsite={{ address.id }}"><input type="radio" v-model="nowsite" value="{{ address.id }}">{{ address.province }} {{ address.city }} {{ address.district }} （{{ address.receiver }} 收） {{ address.mobile }}</dd>
{% endfor %}
{% endif %}
</dl>
<a href="{{ url('users:address') }}" class="edit_site">编辑收货地址</a>
</div>
<h3 class="common_title">支付方式</h3>
<div class="common_list_con clearfix">
<div class="pay_style_con clearfix">
<input type="radio" name="pay_method" value="1" v-model="pay_method">
<label class="cash">货到付款</label>
<input type="radio" name="pay_method" value="2" v-model="pay_method">
<label class="zhifubao"></label>
</div>
</div>
<h3 class="common_title">商品列表</h3>
<div class="common_list_con clearfix">
<ul class="goods_list_th clearfix">
<li class="col01">商品名称</li>
<li class="col02">商品单位</li>
<li class="col03">商品价格</li>
<li class="col04">数量</li>
<li class="col05">小计</li>
</ul>
{% for sku in skus %}
<ul class="goods_list_td clearfix">
<li class="col01">{{loop.index}}</li>
<li class="col02"><img src="{{ sku.default_image.url }}"></li>
<li class="col03">{{ sku.name }}</li>
<li class="col04">台</li>
<li class="col05">{{ sku.price }}元</li>
<li class="col06">{{ sku.count }}</li>
<li class="col07">{{ sku.amount }}元</li>
</ul>
{% endfor %}
</div>
<h3 class="common_title">总金额结算</h3>
<div class="common_list_con clearfix">
<div class="settle_con">
<div class="total_goods_count">共<em>{{ total_count }}</em>件商品，总金额<b>{{ total_amount }}元</b></div>
<div class="transit">运费：<b>{{ freight }}元</b></div>
<div class="total_pay">实付款：<b>{{ payment_amount }}元</b></div>
</div>
</div>
<div class="order_submit clearfix">
<a @click="on_order_submit" id="order_btn">提交订单</a>
</div>
<script type="text/Javascript">
let default_address_id = {{ user.default_address.id }};
let payment_amount = {{ payment_amount }};
</script>


结算订单

orders/ views.py

from django.shortcuts import render
from django.views import View
from django.contrib.auth.mixins import LoginRequiredMixin
from users.models import Address
from goods.models import SKU, SPU
from django_redis import get_redis_connection
class OrderSettlementView(LoginRequiredMixin, View):
"""结算订单"""
def get(self, request):
# 查询用户收货地址(没有被删除的)
user = request.user
try:
addresses = Address.objects.filter(user=user, is_deleted=False)
except Exception as e:
addresses = None
redis_conn = get_redis_connection('carts')
# hash 所有的购物车数据 勾选和未勾选的{'b'1: 'b'2, 'b'2: 'b'3}
# 查询所有的商品
redis_cart = redis_conn.hgetall('cart_%s' % user.id)
# set 被勾选的商品id {b'1'}
# 被勾选的商品id
redis_selected = redis_conn.smembers('selected_%s' % user.id)
# 总计需要将商品数据重新构造出一个新的数据类型
# new_cat_dict --> {b'1':b'2'}->被勾选的商品的个数(1号商品有2件)
new_cart_dict = {}
for sku_id in redis_selected:
new_cart_dict[int(sku_id)] = int(redis_cart[sku_id])
# 取出所有的keys
sku_ids = new_cart_dict.keys()
# 查询出所有被勾选的商品在SKU里
skus = SKU.objects.filter(id__in=sku_ids)
# print(skus)
total_count = 0
total_amount = 0
for sku in skus:
# 给sku添加数量和小计和属性
sku.count = new_cart_dict[sku.id]
sku.amount = sku.price * sku.count
total_count += sku.count
total_amount += sku.amount
freight = 10
context = {
'addresses': addresses,
'skus': skus,
'total_count': total_count, # 购物车商品总件数
'total_amount': total_amount, # 总金额
'freight': freight, # 运费
'payment_amount': total_amount + freight, # 实际付款
}
return render(request, 'place_order.html', context=context)


orders/ urls.py

# @Time:2021/4/3 18:17
# @Author:Ellen
# @File:urls.py
from django.urls import path
from . import views
app_name = 'orders'
urlpatterns = [
# 展示订单
path('orders/settlement/', views.OrderSettlementView.as_view(), name='settlement')
]