from rest_framework import serializers

from goods.models import Goods, GoodsCategory

# 让goods的category字段全量显示

class CategorySerializer(serializers.ModelSerializer):

    class Meta:

        model = GoodsCategory

        fields = "__all__"  # 取所有字段

# 方式一

# class GoodsSerializer(serializers.Serializer):

#     name = serializers.CharField(required=True, max_length=100)

#     click_num = serializers.IntegerField(default=0)

#     goods_front_image=serializers.ImageField()

# 方式二: 用ModelSerializer

class GoodsSerializer(serializers.ModelSerializer):

    category = CategorySerializer()  # 重写category字段,从而实现ModelSerializer的嵌套

    class Meta:

        model = Goods

        # fields = ("name", "click_num", "market_price", "add_time")

        fields = "__all__"  # 取所有字段

from rest_framework import mixins

from rest_framework import generics

from rest_framework.views import APIView

from rest_framework.response import Response

from .models import Goods

from .serializers import GoodsSerializer

# # 方式一, APIview继承了View

# class GoodsListView(APIView):

#     """

#     List all snippets, or create a new snippet.

#     """

#

#     def get(self, request, format=None):

#         goods = Goods.objects.all()[:10]

#         goods_serializer = GoodsSerializer(goods, many=True)  # many:是否是querrySet对象

#         return Response(goods_serializer.data)

# # 方式二: 利用mixins.ListModelMixin, generics.GenericAPIView

# class GoodsListView(mixins.ListModelMixin, generics.GenericAPIView):

#     """

#     商品列表页

#     """

#     queryset = Goods.objects.all()[:10]

#     serializer_class = GoodsSerializer

#

#     def get(self, request, *args, **kwargs):

#         return self.list(request, *args, **kwargs)

# # 方式三,使用更加简便的generics.ListAPIView

# # 原理就是: ListAPIView里面继承了mixins.ListModelMixin, generics.GenericAPIView, 而且还封装了返回

class GoodsListView(generics.ListAPIView):

    """

    商品列表页

    """

    queryset = Goods.objects.all()

    serializer_class = GoodsSerializer

REST_FRAMEWORK = {

    # 解决 1.11.3版本下使用APIview会报'CSRFCheck' object has no attribute 'process_request'的问题

    # "DEFAULT_AUTHENTICATION_CLASSES": [],

    'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',

    'PAGE_SIZE': 10,

}

from rest_framework import mixins

from rest_framework import generics

from rest_framework.views import APIView

from rest_framework.response import Response

from rest_framework.pagination import PageNumberPagination  # 自定义分页

from .models import Goods

from .serializers import GoodsSerializer

# 自定义分页功能, 并实现动态分页, 继承PageNumberPagination

class GoodsPagination(PageNumberPagination):

    page_size = 10

    page_size_query_param = 'page_size'  # 指定每一页显示多少条

    page_query_param = "p"  # 指定要第几页

    max_page_size = 100

class GoodsListView(generics.ListAPIView):

    """

    商品列表页

    """

    queryset = Goods.objects.all()

    serializer_class = GoodsSerializer

    pagination_class = GoodsPagination  # 需要指定分页的类