AttributeError: 'tuple' object has no attribute '_meta' 解决方案

查看错误信息：元组（tuple）对象中没有‘_meta’这个属性？
下面是我的代码

#导入json模块
import json
from django.core import serializers
from django.http import JsonResponse

def ajax_jz(request):
        #获取数据库连接，并获取游标
        cur = connection.cursor()
        #原生SQl语句（连表查询（没有主外键关系））
        sql ='select j.id,h.GPS,j.SystemStatus,j.YuLiu3 from tower_project_jizhan j inner join tower_project_hjinformation h on j.SheBei_Code= h.SheBei_Code'
        #执行命令
        cur.execute(sql)
        #返回查询到的所有数据
        resultData = cur.fetchall()
        for item in resultData:
            print(item)
        #对数据进行序列化，并转成JSON
        ajax_bmsValue = serializers.serialize("json", resultData)
        #返回数据
        return HttpResponse(ajax_bmsValue)

能够查询到数据，但把数据进行序列化时就出错了；是传递的类型不对，还是什么？django的序列化类位于django.core下面的serializers文件夹里面，base.py文件里面定义了序列器和反序列器的基类以及一些异常，init.py文件定义了如何根据格式来选择对应的序列器等内容
init.py

def get_deserializer(format):
if not _serializers:
    _load_serializers()
if format not in _serializers:
    raise SerializerDoesNotExist(format)
return _serializers[format].Deserializer


def serialize(format, queryset, **options):
    """
    Serialize a queryset (or any iterator that returns database objects) using
    a certain serializer.
    """
    s = get_serializer(format)()
    s.serialize(queryset, **options)
    return s.getvalue()

解决方案：
import json

return JsonResponse(json.dumps(data), safe=True)

def ajax_jz(request):
    #获取游标
    cur = connection.cursor()
    sql ='select j.id,h.GPS,j.SystemStatus,j.YuLiu3 from tower_project_jizhan j inner join tower_project_hjinformation h on j.SheBei_Code= h.SheBei_Code'
    cur.execute(sql)
    resultData = cur.fetchall()
    for item in resultData:
        print(item)
     #采用json.dumps
    return HttpResponse(json.dumps(resultData))
    #关闭连接
    cur.close()