DRF 篩選

from rest_framework.generics import ListAPIView,CreateAPIView,UpdateAPIView,RetrieveAPIView,DestroyAPIView
from rest_framework.filters import BaseFilterBackend
from rest_framework import serializers
from rest_framework.pagination import PageNumberPagination
from newapi import models

class ArticleSerializer(serializers.ModelSerializer):
    author_name = serializers.CharField(source="author.username",required=False)
    class Meta:
        model = models.Article
        exclude = ['author']
        
class ArticleFilter(BaseFilterBackend):
    """
    查詢：根據URL中的cagetory參數查詢
    """
    def filter_queryset(self, request, queryset, view):
        val = request.query_params.get('cagetory')
        if val:
            return queryset.filter(category = val)
        return queryset

class ArticleView(ListAPIView,CreateAPIView):
    # queryset對象
    queryset = models.Article.objects.all()
    # 序列化
    serializer_class = ArticleSerializer
    # 篩選規則
    filter_backends = [ArticleFilter,]
    # 分頁
    pagination_class = PageNumberPagination

    def perform_create(self,serializer):
        serializer.save(author_id=2)