Django REST framework (DRF) 是一个强大而灵活的工具包,用于构建Web API,特别是基于Django的应用程序。在Python面试中,对DRF的理解与实际应用能力是衡量候选人Web服务开发能力的重要指标。本篇博客将深入浅出地探讨DRF面试中常见的问题、易错点以及应对策略,并结合实例代码进行讲解。
django-filter
库或内置filterset_fields
实现资源过滤。validate_
方法对关联字段、自定义逻辑进行验证,防止脏数据进入数据库。from rest_framework import serializers
class UserSerializer(serializers.ModelSerializer):
class Meta:
model = User
fields = ['username', 'email', 'password']
def validate_password(self, value):
if len(value) < 8:
raise serializers.ValidationError("Password must be at least 8 characters long.")
return value
from rest_framework.permissions import IsAuthenticatedOrReadOnly
class ArticleViewSet(viewsets.ModelViewSet):
queryset = Article.objects.all()
serializer_class = ArticleSerializer
permission_classes = [IsAuthenticatedOrReadOnly]
from rest_framework.versioning import URLPathVersioning
router = DefaultRouter()
router.versioning_class = URLPathVersioning
router.register(r'users', UserViewSet, basename='user')
class ArticleViewSet(viewsets.ModelViewSet):
queryset = Article.objects.all()
serializer_class = ArticleSerializer
pagination_class = PageNumberPagination
filter_backends = [DjangoFilterBackend]
filterset_fields = ['category', 'author']
from rest_framework.response import Response
class CustomAPIView(APIView):
def get(self, request):
data = {'message': 'Hello, World!'}
return Response(data, status=HTTP_200_OK)
以下是一个使用DRF构建简易博客文章API的示例,涵盖了上述部分知识点:
from django.contrib.auth.models import User
from rest_framework import routers, serializers, viewsets
from .models import Article
class UserSerializer(serializers.ModelSerializer):
class Meta:
model = User
fields = ['id', 'username']
class ArticleSerializer(serializers.ModelSerializer):
author = UserSerializer(read_only=True)
class Meta:
model = Article
fields = ['id', 'title', 'content', 'author', 'created_at']
class ArticleViewSet(viewsets.ModelViewSet):
queryset = Article.objects.all()
serializer_class = ArticleSerializer
router = routers.DefaultRouter()
router.register(r'articles', ArticleViewSet, basename='article')
urlpatterns = [
path('', include(router.urls)),
]
熟练掌握上述Django REST framework的关键知识点、规避常见错误,并通过实战项目积累经验,将有助于你在Python面试中展现优秀的API开发技能,从容应对DRF相关的问题挑战。
原创声明:本文系作者授权腾讯云开发者社区发表,未经许可,不得转载。
如有侵权,请联系 cloudcommunity@tencent.com 删除。
原创声明:本文系作者授权腾讯云开发者社区发表,未经许可,不得转载。
如有侵权,请联系 cloudcommunity@tencent.com 删除。