Question

我有一个名为已部署合同模型的模型，如下所示

function (doc) {

// Leidse plein
latitude = 52.3648111;
longitude = 4.8810906;

distance = Math.acos(
  Math.sin(doc.latitude * Math.PI / 180) * 
  Math.sin(latitude * Math.PI / 180) 
  + 
  Math.cos(doc.latitude * Math.PI / 180) * 
  Math.cos(latitude * Math.PI / 180) * 
  Math.cos((doc.longitude - longitude) * Math.PI / 180)) * 6371;

  // all poi's within 5km radius
  if(distance <= 5 ) {
      emit([doc.title,doc.latitude,doc.longitude], distance);
  }

 }

其中house_owner和house_tenant包含房主和房屋租户的电子邮件，它的序列化程序如下所示

from django.db import models


class DeployedContracts(models.Model):
    house_no = models.CharField(max_length=200, blank=False, default='')
    rent = models.IntegerField(blank=False)
    security_deposit = models.IntegerField(default=0, blank=False)
    house_owner = models.CharField(max_length=100, blank=False, default='')
    house_tenant = models.CharField(max_length=100, blank=False, default='')
    deployed_contract_address = models.CharField(max_length=100, blank='', default='')

    def save(self, *args, **kwargs):
        super(DeployedContracts, self).save(*args, **kwargs)

我想编写一个API视图，其中包含一个get方法，该方法将电子邮件作为参数并返回DeployedContract的所有对象，其中house_owner或house_tenant的电子邮件等于参数中提供的电子邮件。我怎么能在django做到这一点？

Answer 1

您可以导入Q object并尝试此操作：

from django.db.models import Q

qs = DeployedContracts.objects.filter(
    Q(house_owner__iexact=YOURPARAMETER) |
    Q(house_tentant__iexact=YOURPARAMETER)
)

阅读文档了解更多信息。

Answer 2

在get_queryset功能中实施过滤部分。并且可以使用django模型Q object实现 OR 操作。

现在，如果您使用任何参数调用api，它将返回所有DeployedContracts。如果您传递任何电子邮件，这将返回所有过滤结果

from django.db.models import Q

from rest_framework.response import Response
from rest_framework.views import APIView

from deployedcontracts.models import DeployedContracts

class DeployedContractsList(APIView):

    def get_queryset(self):
        deployed_contracts = DeployedContracts.objects.all()
        email = self.request.query_params.get('email')
        if email:
            deployed_contracts = deployed_contracts.filter(
                Q(house_owner__iexact=YOURPARAMETER) |
                Q(house_tentant__iexact=YOURPARAMETER)
            )
        return deployed_contracts

    def get(self, request, format=None):
        service_providers = self.get_queryset()
        serializer = DeployedContractsSerializer(service_providers, many=True)
        return Response(data=serializer.data)

Answer 3

from rest_framework.response import Response
from rest_framework.views import APIView
from django.db.models import Q


class DeployedContractsAPI(APIView):
    def get(self, request, *args, **kwargs):
        email = request.data.get('email', None)
        if email:
            queryset = DeployedContracts.objects.filter(Q(house_owner=email) | Q(house_tentant=email))
            serializer = DeployedContractsSerializer(queryset)
            return Response(data=serializer.data)
        return Response(data={"message": "email parameter not provided"})

您可以阅读有关Django Q expressions here

的更多信息

获取包含特定键django的所有对象

3 个答案: