【django后端分离】mysql原生查询命令后，RawQueryset类型的自定义序列化返回json格式

1：设置mysql原生分页

# 监控系统首页显示分页
def MyPagination(limitid,offsetid):
    limitid =str(limitid)
    offsetid =str(offsetid)

　　 # 这里是mysql原生代码
    show_goods =  "select dal_keywordtable.* from (select asin,min(ranking) as minRanking from `dal_keywordtable` GROUP BY asin) t2 LEFT JOIN dal_keywordtable on t2.asin = dal_keywordtable.asin and t2.minRanking = dal_keywordtable.ranking limit  " + limitid +  offset " + offsetid + ;"
    return show_goods


 用于测试调用
ret = MyPagination(1,2)
print(ret)


返回结果是： # 这里只是确认下参数是否被调用进去
select dal_keywordtable.* from (select asin,min(ranking) as minRanking from `dal_keywordtable` GROUP BY asin) t2 LEFT JOIN dal_keywordtable on t2.asin = dal_keywordtable.asin and t2.minRanking = dal_keywordtable.ranking limit  1 offset 2;    从第1个取 取2个

2：GET请求连接上找到传入的limit与offset:

from utils import orm   导入上面的分页连接，带参数调用这个方法


 从第offsetid开始取，取limitid个
        limitid = request._request.GET.get(limit")
        offsetid = request._request.GET.get(offset)
        raw_Pagination =MyPagination(limitid,offsetid)
        obj_rawqueryset = models.KeyWordTable.objects.raw(raw_Pagination) # 得到

3：序列化查询的RawQueryset类型，返回json格式：

 序列化
        json_data = {}
        data_list = []
        for obj in obj_rawqueryset:
            data = {}      要在遍历里面创建字典用于存数据
            (obj)
            data[goods_title"] = obj.goods_title
            data[src obj.src
            data[single_keyword obj.single_keyword
            data[asin obj.asin
            data[seed_asin obj.seed_asin
            data[ranking obj.ranking
            data[position obj.position
            data[time"] = obj.time.strftime('%Y-%m-%d')
            data_list.append(data)
        json_data[data'] = data_list
         Response(json_data)

 返回给前端的json格式：
{
    : [
        {
            ": Sloggers Women's Waterproof Rain and Garden Shoe with Comfort Insole,Blue Swirls,Size 6,Style 5117SWL06,https://images-na.ssl-images-amazon.com/images/I/41CSEL0bHeL._SS36_.jpg: null,1)">B077TDGR51B01H7X9ASA": 6666662019-12-02
        },{
            S1loggers Women's Waterproof Rain and Garden Shoe with Comfort Insole,1)">B077TDGR53B01H7X9ASBS2loggers Women's Waterproof Rain and Garden Shoe with Comfort Insole,1)">B077TDGR52B01H7X9ASC": 22019-12-03
        }
    ]
}