view > views.APIView > generics.GenericAPIView > viewsets.GenericViewSet
1.APIView(继承 view)官方范例:
class GoodsList(APIView):
"""
List all snippets, or create a new snippet.
""" def get(self, request, format=None):
Goods = Snippet.objects.all() serializer = GoodsSerializer(Goods, many=True) return Response(serializer.data)
重写get(),指定模型,并序列化(serializer)
serializer:
class GoodsSerializer(serializers.Serializer): # 类似与form的功能,但是能序列化为json
name = serializers.CharField(required=True, max_length=100)
click_num = serializers.IntegerField(default=0)
使用serializers.ModelSerializer:
# serializers.ModelSerializer 继承serializers.serializers(可不要指明每个字段,在fields里添加就好了)
class GoodsSerializer(serializers.ModelSerializer): # 类似与form的功能,但是能序列化为json
category = CategorySerializer() # 嵌套外键,获取外键的全部信息,注意CategorySerializer已定义
images = GoodsImageSerializer(many=True)
2.使用上层的generics.GenericAPIView:
在generics.GenericAPIView(view,views.APIView也是 )要重写get(),post()等方法,如果不重写表明不接受GET,POST等方法
覆盖内置变量queryset,serializer_class,get()调用了list是在mixins.ListModelMixin当中的,此函数帮助我们分页,
调用serializer完成序列化
class GoodsListView(mixins.ListModelMixin, generics.GenericAPIView):
"""
商品列表页
"""
queryset = Goods.objects.all()
serializer_class = GoodsSerializer
def get(self, request, *args, **kwargs):
return self.list(request, *args, **kwargs)
更简单的方法:generics帮我们封装好了一些方法可以直接用:
可以直接使用ListAPIView,因为已经帮我们填入了mixins.ListModelMixin和GenericAPIView:
class ListAPIView(mixins.ListModelMixin,
GenericAPIView):
"""
Concrete view for listing a queryset.
"""
def get(self, request, *args, **kwargs):
return self.list(request, *args, **kwargs)
上边的代码改为:
class GoodsListView(generics.ListAPIView):
"""
商品列表页
"""
queryset = Goods.objects.all()
serializer_class = GoodsSerializer
分页设置:在setting中设置:
REST_FRAMEWORK = { # rest-framework的配置
'PAGE_SIZE': 10, # 分页配置
}
自定义分页配置:
class GoodsPagination(PageNumberPagination): # 定制分页设置
page_size = 12
page_size_query_param = 'page_size'
page_query_param = "page"
max_page_size = 100
字段引用:
pagination_class = GoodsPagination
class SnippetList(APIView): """ List all snippets, or create a new snippet. """ def get(self, request, format=None): snippets = Snippet.objects.all() serializer = SnippetSerializer(snippets, many=True) return Response(serializer.data)
作者:天涯明月笙
链接:https://www.jianshu.com/p/6a6fa62d8152
來源:简书
简书著作权归作者所有,任何形式的转载都请联系作者获得授权并注明出处。
class SnippetList(APIView): """ List all snippets, or create a new snippet. """ def get(self, request, format=None): snippets = Snippet.objects.all() serializer = SnippetSerializer(snippets, many=True) return Response(serializer.data)
作者:天涯明月笙
链接:https://www.jianshu.com/p/6a6fa62d8152
來源:简书
简书著作权归作者所有,任何形式的转载都请联系作者获得授权并注明出处。
class SnippetList(APIView): """ List all snippets, or create a new snippet. """ def get(self, request, format=None): snippets = Snippet.objects.all() serializer = SnippetSerializer(snippets, many=True) return Response(serializer.data)
作者:天涯明月笙
链接:https://www.jianshu.com/p/6a6fa62d8152
來源:简书
简书著作权归作者所有,任何形式的转载都请联系作者获得授权并注明出处。
generics