新增地址前后端逻辑

1. 定义用户地址模型类

1.用户地址模型类

from utils.models import BaseModel

class Address(BaseModel):
    """用户地址"""
    user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='addresses', verbose_name='用户')
    title = models.CharField(max_length=20, verbose_name='地址名称')
    receiver = models.CharField(max_length=20, verbose_name='收货人')
    province = models.ForeignKey('areas.Area', on_delete=models.PROTECT, related_name='province_addresses', verbose_name='省')
    city = models.ForeignKey('areas.Area', on_delete=models.PROTECT, related_name='city_addresses', verbose_name='市')
    district = models.ForeignKey('areas.Area', on_delete=models.PROTECT, related_name='district_addresses', verbose_name='区')
    place = models.CharField(max_length=50, verbose_name='地址')
    mobile = models.CharField(max_length=11, verbose_name='手机')
    tel = models.CharField(max_length=20, null=True, blank=True, default='', verbose_name='固定电话')
    email = models.CharField(max_length=30, null=True, blank=True, default='', verbose_name='电子邮箱')
    is_deleted = models.BooleanField(default=False, verbose_name='逻辑删除')

    class Meta:
        db_table = 'tb_address'
        verbose_name = '用户地址'
        verbose_name_plural = verbose_name
        ordering = ['-update_time']

2.Address模型类说明

• Address模型类中的外键指向areas/models里面的Area 。指明外键时，可以使用应用名.模型类名来定义。
• ordering表示在进行Address查询时，默认使用的排序方式。
  • ordering = ['-update_time']: 根据更新的时间倒叙。

3.补充用户模型默认地址字段

class User(AbstractUser):
    """自定义用户模型类"""
    mobile = models.CharField(max_length=11, unique=True, verbose_name='手机号')
    email_active = models.BooleanField(default=False, verbose_name='邮箱验证状态')
    default_address = models.ForeignKey('Address', related_name='users', null=True, blank=True, on_delete=models.SET_NULL, verbose_name='默认地址')

    class Meta:
        db_table = 'tb_users'
        verbose_name = '用户'
        verbose_name_plural = verbose_name

    def __str__(self):
        return self.username

需要进行迁移。

  python manage.py makemigrations
  python manage.py migrate

2. 新增地址接口设计和定义

1.请求方式

2.请求参数：JSON

3.响应结果：JSON

3. 新增地址后端逻辑实现

提示：

• 用户地址数量有上限，最多20个，超过地址数量上限就返回错误信息

class CreateAddressView(LoginRequiredJSONMixin, View):
    """新增地址"""

    def post(self, request):
        """实现新增地址逻辑"""
        # 判断是否超过地址上限：最多20个
        # Address.objects.filter(user=request.user).count()
        count = request.user.addresses.count()
        if count >= constants.USER_ADDRESS_COUNTS_LIMIT:
            return http.JsonResponse({'code': RETCODE.THROTTLINGERR, 'errmsg': '超过地址数量上限'})

        # 接收参数
        json_dict = json.loads(request.body.decode())
        receiver = json_dict.get('receiver')
        province_id = json_dict.get('province_id')
        city_id = json_dict.get('city_id')
        district_id = json_dict.get('district_id')
        place = json_dict.get('place')
        mobile = json_dict.get('mobile')
        tel = json_dict.get('tel')
        email = json_dict.get('email')

        # 校验参数
        if not all([receiver, province_id, city_id, district_id, place, mobile]):
            return http.HttpResponseBadRequest('缺少必传参数')
        if not re.match(r'^1[3-9]\d{9}$', mobile):
            return http.HttpResponseBadRequest('参数mobile有误')
        if tel:
            if not re.match(r'^(0[0-9]{2,3}-)?([2-9][0-9]{6,7})+(-[0-9]{1,4})?$', tel):
                return http.HttpResponseBadRequest('参数tel有误')
        if email:
            if not re.match(r'^[a-z0-9][\w\.\-]*@[a-z0-9\-]+(\.[a-z]{2,5}){1,2}$', email):
                return http.HttpResponseBadRequest('参数email有误')

        # 保存地址信息
        try:
            address = Address.objects.create(
                user=request.user,
                title = receiver,
                receiver = receiver,
                province_id = province_id,
                city_id = city_id,
                district_id = district_id,
                place = place,
                mobile = mobile,
                tel = tel,
                email = email
            )

            # 设置默认地址
            if not request.user.default_address:
                request.user.default_address = address
                request.user.save()
        except Exception as e:
            logger.error(e)
            return http.JsonResponse({'code': RETCODE.DBERR, 'errmsg': '新增地址失败'})

        # 新增地址成功，将新增的地址响应给前端实现局部刷新
        address_dict = {
            "id": address.id,
            "title": address.title,
            "receiver": address.receiver,
            "province": address.province.name,
            "city": address.city.name,
            "district": address.district.name,
            "place": address.place,
            "mobile": address.mobile,
            "tel": address.tel,
            "email": address.email
        }

        # 响应保存结果
        return JsonResponse({'code': 0, 'errmsg': '新增地址成功', 'address':address_dict})