Django之自身關聯自身（樹狀）

## 首先非常感謝您的閱讀，由於項目需要，需要對地區參數進行配置，以下分享以下地區樹狀結構在Django中的應用
models.py``

class ChinaArea(models.Model):
    """
    中國省市區（縣）列表
    數據來源於高德地圖
    """
    uuid = models.CharField(max_length=64, unique=True, null=True)
    fatherUuid = models.ForeignKey('self', on_delete=models.CASCADE, to_field='uuid', null=True, default=None)
    level = models.CharField(max_length=32,verbose_name="級別")
    adcode = models.CharField(max_length=32,verbose_name="區域代碼")
    name = models.CharField(max_length=64,verbose_name="區域名")
    center = models.CharField(max_length=32,verbose_name="中心點")
    status = models.CharField(max_length=32, default='normal')
    createTime = models.DateTimeField(auto_now_add=True)
    updateTime = models.DateTimeField(auto_now=True)

數據存入數據庫

def area_create(request):
    """
    存儲地區信息
    :param request:
    :return:
    """
    url = "https://restapi.amap.com/v3/config/district"
    headers = {
        'User-Agent': 'Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; InfoPath.3)'}
    params = {
        "key": "高德web的key",
        "subdistrict": 3
    }
    res = requests.get(url, params=params, headers=headers)
    res.encoding = "utf-8"
    # html爲json格式的字符串
    data = res.text
    # 把json格式字符串轉爲python數據類型
    data = json.loads(data)
    if data['info'] == "OK":
        try:
            info = data["districts"][0]
            with transaction.atomic():
                uuid1 = get_uuid()
                country = ChinaArea(
                    uuid=uuid1,
                    level=info['level'],
                    adcode=info['adcode'],
                    name=info['name'],
                    center=info['center'],
                )
                country.save()
                for pro in info['districts']:
                    uuid2 = get_uuid()
                    province = ChinaArea(
                        uuid=uuid2,
                        fatherUuid=country,
                        level=pro['level'],
                        adcode=pro['adcode'],
                        name=pro['name'],
                        center=pro['center'],
                    )
                    province.save()
                    for cit in pro['districts']:
                        uuid3 = get_uuid()
                        city = ChinaArea(
                            uuid=uuid3,
                            fatherUuid=province,
                            level=cit['level'],
                            adcode=cit['adcode'],
                            name=cit['name'],
                            center=cit['center'],
                        )
                        city.save()
                        for are in cit['districts']:
                            uuid4 = get_uuid()
                            area = ChinaArea(
                                uuid=uuid4,
                                fatherUuid=city,
                                level=are['level'],
                                adcode=are['adcode'],
                                name=are['name'],
                                center=are['center'],
                            )
                            area.save()
        except Exception as e:
            logging.error(str(e))
            print(str(e))
            return http_return(400, '失敗')
    else:
        return http_return(400, '響應失敗')
    return http_return(200, '成功')

數據查詢接口提供

@check_admin_rule
def area_query(request):
    """
    區域信息獲取
    :param request:
    :return:
    """
    uuid = request.GET.get('uuid', '')
    areas = ChinaArea.objects.filter(level="province").all()
    if uuid != '':
        areas = ChinaArea.objects.filter(fatherUuid__uuid=uuid).all()
    areaList = []
    for area in areas:
        areaList.append({
            "uuid": area.uuid,
            "name": area.name,
        })
    return http_return(200, "成功", {"area": areaList})