legacy/pairent_backend/pairent_app/views.py

from rest_framework import viewsets
from rest_framework.response import Response
from rest_framework.views import APIView, View
from rest_framework.request import Request

from django.http import HttpResponseBadRequest

from .models import Apartament, User
from .serializer import (ApartamentListSerializer, 
                         ApartamentDetailSerializer)

import json

class ApartamentViewSet(viewsets.ReadOnlyModelViewSet):
    """Вывод списка квартир или отдельной квартиры"""

    def get_queryset(self):
        apartaments = Apartament.objects.all()
        return apartaments
    
    def get_serializer_class(self):
        if self.action == 'list':
            return ApartamentListSerializer
        elif self.action == "retrieve":
            return ApartamentDetailSerializer

class ApartamentGetManyViewSet(viewsets.ReadOnlyModelViewSet):
    """Вывод отдельных квартир для сравнения"""
    def get_queryset(self): # получение id квартир для избранного или сравнения
        pk = self.request.query_params.get("pk", None) # получение id пользователя

        if self.action == "retrieve": # если для страницы сравнения
            apartaments_id = User.objects.get(pk=pk).apartaments_for_comparison.split(',') # получение id квартир
        elif self.action == "list": # если для страницы избранного
            apartaments_id = User.objects.get(pk=pk).favorites_apartaments.split(',') # получение id квартир
        
        queryset = []
        for i in apartaments_id:
            queryset.append(Apartament.objects.get(pk=i))

        return queryset
    
    def retrieve(self, request, *args, **kwargs):
        queryset = self.get_queryset()
        apartaments = []
        for i in queryset:
            apartaments.append(ApartamentDetailSerializer(i).data)
        return Response({'results': apartaments})

    def list(self, request, *args, **kwargs):
        queryset = self.get_queryset()
        apartaments = []
        for i in queryset:
            apartaments.append(ApartamentListSerializer(i).data)
        return Response({'results': apartaments})

class ApartmentFilter(viewsets.ViewSet):
    """Вывод списка квартир или отдельной квартиры"""

    def list(self, req: Request):
        filters = dict(req.data);
        unfiltered = ApartamentDetailSerializer(Apartament.objects.all()[:100], many=True).data;
        filtered = [];

        for entry in unfiltered:
            if (filters['price_range']['from'] >= entry['price'] and (filters['price_range']['to'] != -1 and filters['price_range']['to'] <= entry['price'])):
                continue;
            if (filters['area_range']['from'] >= entry['perimetrs'] and (filters['area_range']['to'] != -1 and filters['area_range']['to'] <= entry['perimetrs'])):
                continue;
            if (filters['rooms'] != -1 and entry['rooms'] != filters['rooms']):
                continue;
            
            filtered.append(entry);

        return Response(filtered);