Vue + Django API 前后端分离学习笔记 3.4 trade交易的model设计

桃扇骨 2022-02-05 11:21 94阅读 0赞

没啥特别的地方： 主要是业务逻辑方面要理顺

需要的表：

购物车表， 订单表， 订单的商品详情表

然后这里涉及到的两个知识点：

1. 导入UserProfile  可以用以下方法替代：

from django.contrib.auth import get_user_model
    User = get_user_model()
    
    # get_user_model源码：
    
    def get_user_model():
        """
        Return the User model that is active in this project.
        """
        try:
    # 注意这里  它是调用AUTH_USER_MODEL变量
            return django_apps.get_model(settings.AUTH_USER_MODEL, require_ready=False)
        except ValueError:
            raise ImproperlyConfigured("AUTH_USER_MODEL must be of the form 'app_label.model_name'")
        except LookupError:
            raise ImproperlyConfigured(
                "AUTH_USER_MODEL refers to model '%s' that has not been installed" % settings.AUTH_USER_MODEL
            )

另一个是在字段中的一个参数：

order_sn = models.CharField(max_length=30, unique=True, verbose_name=u'订单号')
    
    # 这个 unique 表示唯一

其他没了  上代码：

# -*- coding:utf-8 -*-
    
    from django.db import models
    from django.contrib.auth import get_user_model
    
    from goods.models import Goods
    
    from datetime import datetime
    
    User = get_user_model()
    
    # Create your models here.
    
    class ShoppingCart(models.Model):
        """
        购物车
        """
        user = models.ForeignKey(User, verbose_name=u'用户', on_delete=models.CASCADE)
        goods = models.ForeignKey(Goods, verbose_name=u'商品', on_delete=models.CASCADE)
        goods_num = models.IntegerField(default=0, verbose_name=u'购买数量')
        add_time = models.DateTimeField(default=datetime.now, verbose_name=u'添加时间')
    
        class Meat:
            verbose_name = u'购物车'
            verbose_name_plural = verbose_name
    
        def __str__(self):
            return "%s(%d)".format(self.goods.name, self.goods_num)
    
    
    class OrderInfo(models.Model):
        """
        订单
        """
        ORDER_STATUS = (
            ('success', u'成功'),
            ('cancel', u'取消'),
            ('paying', u'待支付')
        )
        user = models.ForeignKey(User, verbose_name=u'用户', on_delete=models.CASCADE)
        order_sn = models.CharField(max_length=30, unique=True, verbose_name=u'订单号')
        nonce_str = models.CharField(max_length=50, null=True, blank=True, verbose_name=u'随机加密串')
        trade_no = models.CharField(max_length=100, unique=True, null=True, blank=True, verbose_name=u'交易号')
        pay_status = models.CharField(choices=ORDER_STATUS, max_length=10, verbose_name=u'订单状态')
        post_script = models.CharField(max_length=11, verbose_name=u'订单留言')
        order_mount = models.FloatField(default=0.0, verbose_name=u'订单金额')
        pay_time = models.DateTimeField(null=True, blank=True, verbose_name=u'支付时间')
    
        #用户信息
        address = models.CharField(max_length=100, default='', verbose_name=u'收货地址')
        signer_name = models.CharField(max_length=20, default="", verbose_name=u'收货人')
        singer_mobile = models.CharField(max_length=11, verbose_name=u'联系电话')
    
        add_time = models.DateTimeField(default=datetime.now, verbose_name=u'添加时间')
    
        class Meta:
            verbose_name = u'订单'
            verbose_name_plural = verbose_name
    
        def __str__(self):
            return str(self.order_sn)
    
    
    class OrderGoods(models.Model):
        """
        订单的商品详情
        """
        order = models.ForeignKey(OrderInfo, verbose_name=u'订单信息', on_delete=models.CASCADE)
        goods = models.ForeignKey(Goods, verbose_name=u'商品', on_delete=models.CASCADE)
        goods_num = models.IntegerField(default=0, verbose_name=u'商品数量')
        add_time = models.DateTimeField(default=datetime.now, verbose_name=u'添加时间')
    
        class Meta:
            verbose_name = u'订单商品'
            verbose_name_plural = verbose_name
    
        def __str__(self):
            return str(self.order.order_sn)