Django为过滤器动态查询

from django.db.models import Q
from rest_framework import generics
from .models import Article
from .serializers import ArticleSerializer

class ArticleList(generics.ListAPIView):
    serializer_class = ArticleSerializer

    def get_queryset(self):
        queryset = Article.objects.all()
        tag = self.request.query_params.get('tag', None)
        start_date = self.request.query_params.get('start_date', None)
        end_date = self.request.query_params.get('end_date', None)

        if tag is not None:
            queryset = queryset.filter(tags__name=tag)

        if start_date is not None and end_date is not None:
            queryset = queryset.filter(publish_date__range=[start_date, end_date])

        return queryset

from django.db.models import Q

class ArticleFilter:
    @staticmethod
    def filter_by_params(queryset, tag=None, start_date=None, end_date=None):
        filters = Q()

        if tag is not None:
            filters &= Q(tags__name=tag)

        if start_date is not None and end_date is not None:
            filters &= Q(publish_date__range=[start_date, end_date])

        return queryset.filter(filters)

# 在视图中使用
class ArticleList(generics.ListAPIView):
    serializer_class = ArticleSerializer

    def get_queryset(self):
        queryset = Article.objects.all()
        return ArticleFilter.filter_by_params(
            queryset,
            tag=self.request.query_params.get('tag'),
            start_date=self.request.query_params.get('start_date'),
            end_date=self.request.query_params.get('end_date')
        )