Question

我有3个表 PC（ID，PcNAME，Brand）， CellPhoness（ID，CellPhoneName，Brand），打印机（ID，PrinterName，Brand） 。这三个表之间没有关系。我想在用户可以输入搜索字符串的地方运行查询，程序将在3个模型中搜索数据的存在位置，并以JSON响应的形式返回ID，名称和品牌。

Answer 1

The above answer lacks curly braces in the dictionary resulting the error.  
Just added braces in the above code.  

 def view(request):
        query = request.GET.get("query", None)
        pcs = PC.objects.all()
        cell_phones = CellPhone.objects.all()
        printers = Printer.objects.all()
    
        if query:
            pcs = pcs.filter(name__icontains=query)
            cell_phones = cell_phones.filter(name__icontains=query)
            printers = printers.filter(name__icontains=query)
    
        return JsonResponse({"pcs": PCSerializer(instances=pcs, many=True).data,
                            "cell_phones": CellPhoneSerializer(instances=cell_phones, many=True).data,
                            "printers": PrinterSerializer(instances=printers, many=True).data})

Answer 2

您可以执行以下操作：

从查询参数中获取查询文本
基于它的过滤器

返回序列化器数据

def view(request):
    query = request.GET.get("query", None)
    pcs = PC.objects.all()
    cell_phones = CellPhone.objects.all()
    printers = Printer.objects.all()

    if query:
        pcs = pcs.filter(name__icontains=query)
        cell_phones = cell_phones.filter(name__icontains=query)
        printers = printers.filter(name__icontains=query)

    return JsonResponse("pcs": PCSerializer(instances=pcs, many=True).data,
                        "cell_phones": CellPhoneSerializer(instances=cell_phones, many=True).data,
                        "printers": PrinterSerializer(instances=printers, many=True).data)

您需要为每个对象创建序列化器，请查看此https://www.django-rest-framework.org/api-guide/serializers/

在Django Rest Framework中搜索多个模型的表

2 个答案: